{"id":11570,"date":"2026-01-24T15:11:15","date_gmt":"2026-01-24T15:11:15","guid":{"rendered":"https:\/\/fsxchemical.com\/?p=11570"},"modified":"2026-09-28T07:15:25","modified_gmt":"2026-09-28T07:15:25","slug":"wet-pick-up-vs-dry-chemical-add-on-digital-textile-pretreatment","status":"publish","type":"post","link":"https:\/\/fsxchemical.com\/vi\/blog\/wet-pick-up-vs-dry-chemical-add-on-digital-textile-pretreatment\/","title":{"rendered":"Ph\u01b0\u01a1ng ph\u00e1p thu h\u1ed3i \u01b0\u1edbt so v\u1edbi ph\u01b0\u01a1ng ph\u00e1p b\u1ed5 sung h\u00f3a ch\u1ea5t kh\u00f4 trong x\u1eed l\u00fd s\u01a1 b\u1ed9 v\u1ea3i k\u1ef9 thu\u1eadt s\u1ed1: N\u00ean ki\u1ec3m so\u00e1t th\u00f4ng s\u1ed1 n\u00e0o?"},"content":{"rendered":"\n<p class=\"wp-block-wd-paragraph wd-dc71c90e\"><em>Wet pick-up and dry chemical add-on describe two different parts of digital textile pretreatment. Wet pick-up tells the mill how much pretreatment liquor the fabric retains after application, while dry chemical add-on tells the mill how much nonvolatile chemistry is actually deposited on the textile after water is removed. Wet pick-up is therefore a key machine and moisture-control parameter; dry add-on is the more direct chemistry\/dosage parameter. Neither should be used alone. A stable production process controls the liquor concentration, measures wet pick-up or deposited wet add-on, calculates the resulting chemical add-on, verifies drying and residual moisture, and then confirms the finished print after fixation and washing.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-7b239aa1\">Wet Pick-Up vs. Dry Chemical Add-On: Which Number Should You Control?<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1dda2bc4\">The most useful answer is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9c29a7af\"><strong>Control both\u2014but use them for different purposes.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-49c7490b\"><strong>Wet pick-up<\/strong>&nbsp;tells you how much pretreatment liquor is retained by the fabric immediately after application.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-80f801f6\"><strong>Dry chemical add-on<\/strong>&nbsp;tells you how much chemical or active solids are actually delivered to the fabric after the water carrier is removed.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3403a6b8\">In production:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wet pick-up is a direct application \/ machine-control parameter.<\/li>\n\n\n\n<li>Bath concentration or solids is a formulation-control parameter.<\/li>\n\n\n\n<li>Dry chemical add-on is the calculated or verified dosage result created by those two variables together.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-914dbb5f\">A practical control chain is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-33714d6e\"><strong>Bath Concentration \u00d7 Wet Pick-Up \u2192 Chemical Add-On \u2192 Drying \/ Residual Moisture \u2192 Printing \u2192 Fixation \u2192 Wash-Off<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8ed4ef92\">Controlling only wet pick-up can miss changes in bath concentration.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-698ffccc\">Controlling only dry add-on can miss changes in water load, drying demand and chemical distribution.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-e561b369\">What Is Wet Pick-Up?<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7cdf4f3c\">Wet pick-up describes the mass of pretreatment liquor retained by the fabric relative to the original dry fabric mass.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9bded049\">It answers the question:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8980e562\"><strong>How Much Liquid Did the Fabric Take from the Application Process?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-36b81730\">Wet pick-up is affected by:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fabric absorbency<\/li>\n\n\n\n<li>Fiber type<\/li>\n\n\n\n<li>GSM and construction<\/li>\n\n\n\n<li>Nip pressure<\/li>\n\n\n\n<li>Roll condition<\/li>\n\n\n\n<li>Bath viscosity<\/li>\n\n\n\n<li>Fabric tension<\/li>\n\n\n\n<li>Line speed<\/li>\n\n\n\n<li>Application route<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0ad508bb\">It is therefore a process output, not simply a machine setting.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-1d9b2b11\">What Is Dry Chemical Add-On?<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-75ed934a\">Dry chemical add-on describes the amount of retained nonvolatile chemistry relative to the dry untreated fabric mass.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e4eede19\">It answers:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3ad08d05\"><strong>How Much Functional Chemistry Did the Fabric Actually Receive?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f494bfd5\">Depending on the purpose of the calculation, this can mean:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Total pretreatment solids add-on<\/li>\n\n\n\n<li>Polymer add-on<\/li>\n\n\n\n<li>Alkali add-on<\/li>\n\n\n\n<li>Urea \/ moisture-management add-on<\/li>\n\n\n\n<li>Another individual component add-on<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-281818cb\">This distinction matters because the total bath may contain both active chemistry and water.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bb8b84bf\">For formulation comparison, component-specific add-on is often more informative than product dosage alone.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-2cfd63a6\">How Wet Pick-Up and Dry Add-On Are Related<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-339a3d23\">The basic mass-balance relationship is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-068289fb\"><strong>Dry Add-On = Wet Pick-Up \u00d7 Chemical Concentration<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e13cae18\">when both values are expressed on compatible mass-percentage bases.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ad24fe06\">This means:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Higher wet pick-up increases chemical add-on when bath concentration stays constant.<\/li>\n\n\n\n<li>Higher bath concentration increases chemical add-on when wet pick-up stays constant.<\/li>\n\n\n\n<li>The same dry add-on can be produced by different combinations of wet pick-up and concentration.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0a7fd461\">This relationship is the key to understanding why wet pick-up and dry add-on should not be treated as competing measurements.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d7c8faf9\">They are linked variables describing different stages of the same mass balance.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-09dc5dfc\">Wet Pick-Up Calculation<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-11c31dc7\">A standard gravimetric calculation is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1f730200\"><strong>Wet Pick-Up (%) = (Wet Fabric Weight \u2212 Dry Fabric Weight) \u00f7 Dry Fabric Weight \u00d7 100<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9a71c9bc\">Example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dry fabric = 100 g<\/li>\n\n\n\n<li>Fabric immediately after pretreatment = 180 g<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-666fb7cb\">The retained liquor is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bb066e79\"><strong>180 \u2212 100 = 80 g<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e67ba8bb\">Therefore:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5ee7793d\"><strong>Wet Pick-Up = 80%<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8494a10c\">The wet fabric should be weighed promptly because evaporation before weighing will underestimate the actual pick-up.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-620e7e39\">Dry Chemical Add-On Calculation<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-035542b3\">If the retained pretreatment liquor contains 5% active solids by weight and wet pick-up is 80%:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-102cb2a9\"><strong>Dry Add-On (%) = 80 \u00d7 5 \u00f7 100 = 4%<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-865f5bfd\">This means that, theoretically, 100 g of original dry fabric carries approximately 4 g of active dry chemistry after the carrier water is removed.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b5fb234d\">The simplified formula is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-27525adc\"><strong>Dry Add-On (% owf) = Wet Pick-Up (%) \u00d7 Active Bath Concentration (wt%) \u00f7 100<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-309d745d\">This calculation assumes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The bath is homogeneous.<\/li>\n\n\n\n<li>The retained liquor has the same concentration as the measured bath.<\/li>\n\n\n\n<li>No significant chemical is selectively lost before drying.<\/li>\n\n\n\n<li>The concentration and pick-up use compatible mass bases.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-b74fccdd\">Supplied Product Concentration vs. Active Solids<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2bc499df\">A common calculation error is to treat supplied product dosage as if it were dry solids.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1f31a1b7\">Consider a liquid pretreatment product that itself contains only part active solids.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5da9cad3\">The mass balance becomes:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8dd44bb6\"><strong>Dry Active Add-On = Wet Pick-Up \u00d7 Product Concentration in Bath \u00d7 Product Solids Fraction<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2e88cddf\">When expressed as percentages:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9e2b805f\"><strong>Dry Active Add-On (%) = WPU (%) \u00d7 Bath Product Concentration (%) \u00d7 Product Solids (%) \u00f7 10,000<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0bf5406e\">For powder products that are essentially all nonvolatile material, product dosage and solids dosage can be much closer.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-08248b3d\">For liquid emulsions, dispersions or compound products, solids content should be known before making a dry-add-on comparison.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-c9818fa6\">How to Handle Bath Concentration in g\/L<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-59ef9e18\">Textile formulations are often written in g\/L rather than weight percent.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-291136d3\">For accurate conversion, bath density should be considered.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3a48fb51\">A practical relationship is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6a2073e0\"><strong>Concentration (wt%) = Concentration (g\/L) \u00f7 [10 \u00d7 Bath Density (g\/mL)]<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c54a411d\">If bath density is close to 1.00 g\/mL, then 50 g\/L is approximately 5 wt%.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b3748943\">But for higher-solids or high-density baths, assuming density = 1 can introduce calculation error.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7dbbd550\">Use measured density when accurate add-on comparison matters.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-ac3ccfa5\">Worked Example: Same Fabric, Same Bath<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-cbba9251\">Assume:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dry fabric mass = 100 g<\/li>\n\n\n\n<li>Wet pick-up = 80%<\/li>\n\n\n\n<li>Active bath solids = 5 wt%<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d6530dcc\">The fabric retains:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9069d468\"><strong>80 g of pretreatment liquor.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2fd82962\">Theoretical active solids delivered:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d6b9c7d5\"><strong>80 g \u00d7 5% = 4 g<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-94a2a879\">Dry chemical add-on:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-58c7c046\"><strong>4 g \u00f7 100 g fabric \u00d7 100 = 4% owf<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3b786864\">This example illustrates why wet pick-up is not the same as chemical add-on.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1200536c\">The fabric picked up 80% liquid but only 4% dry active chemistry.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-35ac192f\">Same Dry Add-On Can Still Give Different Printing Results<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-61ffa042\">This is one of the most important points.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c46ef8c2\">Consider two theoretical routes:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Condition<\/th><th>Wet Pick-Up<\/th><th>Bath Active Solids<\/th><th>Theoretical Dry Add-On<\/th><\/tr><\/thead><tbody><tr><td>A<\/td><td>80%<\/td><td>5.0%<\/td><td>4.0%<\/td><\/tr><tr><td>B<\/td><td>60%<\/td><td>6.67%<\/td><td>Approximately 4.0%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7bafd17c\">The dry chemical add-on is approximately the same.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-64530c01\">But Condition A carries more water into the fabric and dryer.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-acdf4700\">This can change:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Drying energy<\/li>\n\n\n\n<li>Drying time<\/li>\n\n\n\n<li>Residual moisture<\/li>\n\n\n\n<li>Chemical migration<\/li>\n\n\n\n<li>Fabric swelling<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ad90e1b3\">Therefore:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7cf5715b\"><strong>Same Dry Add-On \u2260 Same Pretreatment Process.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-38471251\">The water carrier still matters.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-4fed8209\">Same Wet Pick-Up Can Give Different Dry Add-On<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7c3ca7f3\">The reverse is also true.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bc092297\">If two baths both run at 70% wet pick-up but one contains more active solids, the chemical add-on is different.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e53b4fe8\">For example:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Condition<\/th><th>Wet Pick-Up<\/th><th>Bath Active Solids<\/th><th>Theoretical Dry Add-On<\/th><\/tr><\/thead><tbody><tr><td>A<\/td><td>70%<\/td><td>4%<\/td><td>2.8%<\/td><\/tr><tr><td>B<\/td><td>70%<\/td><td>6%<\/td><td>4.2%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-63a196f5\">Therefore, a mill cannot say:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-17f71895\"><strong>\u201cBoth fabrics had 70% pick-up, so they received the same pretreatment.\u201d<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0e8c6b75\">The bath concentration must also be controlled.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-1b69ce73\">Which Number Should Production Control First?<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8a8001f1\">For a padding process, production should normally control:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Bath composition \/ concentration<\/strong><\/li>\n\n\n\n<li><strong>Actual wet pick-up<\/strong><\/li>\n\n\n\n<li><strong>Calculated chemical add-on<\/strong><\/li>\n\n\n\n<li><strong>Residual moisture after drying<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c74beb40\">These variables serve different functions.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d375df7d\">Wet pick-up is usually easier to measure frequently on the line.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9d8885a1\">Dry add-on is the more useful number when comparing chemical dosage across:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Different bath concentrations<\/li>\n\n\n\n<li>Different application routes<\/li>\n\n\n\n<li>Different pretreatment products<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1e75b691\">The strongest control plan links them rather than choosing one.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-93b948fd\">Wet Pick-Up Is a Machine Result; Dry Add-On Is a Chemistry Result<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e763c112\">A useful way to separate responsibilities is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1b341a8d\"><strong>Machine \/ Application Side \u2192 Wet Pick-Up<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8c0e5de6\"><strong>Formulation Side \u2192 Bath Concentration \/ Solids<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-fadd13ad\"><strong>Fabric Chemistry Side \u2192 Dry Add-On<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a2828ffe\"><strong>Drying Side \u2192 Residual Moisture \/ Distribution<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e8816178\">This makes troubleshooting clearer.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1afec9a3\">If wet pick-up changes while bath solids remain stable, investigate application mechanics.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-986833ae\">If pick-up is stable but add-on changes, investigate bath concentration or formulation preparation.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-2fda1c68\">Padding: Why Wet Pick-Up Is Essential<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7b395888\">Padding applies chemistry by wetting the fabric and then squeezing out excess liquor.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-70ec6177\">The wet pick-up is directly influenced by:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nip pressure<\/li>\n\n\n\n<li>Roll hardness \/ condition<\/li>\n\n\n\n<li>Fabric absorbency<\/li>\n\n\n\n<li>Fabric speed<\/li>\n\n\n\n<li>Bath viscosity<\/li>\n\n\n\n<li>Fabric tension<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-71939867\">Nominal padder pressure is only a machine input.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e83aaf64\">Measured wet pick-up is the more direct process result.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c9b30a6d\">For reactive digital pretreatment, changing pick-up changes both:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chemical add-on<\/li>\n\n\n\n<li>Water carried into drying<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f4216cd6\">which is why it should be recorded in every meaningful trial.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-e1dd1ad9\">Coating: Why Coating Weight Can Be More Useful Than Pick-Up<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b48a3e49\">For a coating process, especially surface-localized coating, the most practical control may be:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wet coating weight<\/li>\n\n\n\n<li>Dry coating weight<\/li>\n\n\n\n<li>g\/m\u00b2 add-on<\/li>\n\n\n\n<li>% owf add-on<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-31ae1292\">rather than a padding-style pick-up number.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3234a43d\">The same mass-balance principle still applies:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6e31ee8a\"><strong>Wet Coating Add-On \u00d7 Solids Fraction \u2192 Dry Coating Add-On<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-dbe0198a\">Coating also requires control of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gap<\/li>\n\n\n\n<li>Tension<\/li>\n\n\n\n<li>Rheology<\/li>\n\n\n\n<li>Fabric thickness<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8402eaa3\">because the dry add-on must remain uniform across width.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-a25b659b\">Spray: Control Deposited Mass, Not Pump Flow Alone<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-59e47fc2\">In spray application, pump flow or nozzle output does not automatically equal fabric add-on.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a650c317\">Some sprayed liquid can be affected by:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Overspray<\/li>\n\n\n\n<li>Nozzle overlap<\/li>\n\n\n\n<li>Edge loss<\/li>\n\n\n\n<li>Droplet bounce \/ poor wetting<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-aa61a396\">Therefore, production should verify actual deposited mass on fabric.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8424053b\">Useful controls include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Total wet spray add-on<\/li>\n\n\n\n<li>Dry solids add-on<\/li>\n\n\n\n<li>Widthwise deposition uniformity<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1ab08bce\">Do not compare spray with padding solely from liters of liquor used.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-55c91b19\">Wet-on-Wet Printing: Pick-Up Also Becomes a Moisture Variable<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b5abdaa5\">In controlled wet-on-wet printing, wet pick-up does two jobs at once.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-dd0426d4\">It determines:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chemical add-on<\/li>\n\n\n\n<li>Moisture present when printing begins<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-293839b2\">This makes wet pick-up especially important.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d0ce161c\">Two fabrics with the same theoretical dry add-on can behave differently if one carries more water at the moment of inkjet printing.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4a883e8c\">Record:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Initial wet pick-up<\/li>\n\n\n\n<li>Time between pretreatment and printing<\/li>\n\n\n\n<li>Fabric moisture immediately before printing<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-67a29774\">The correct target is a reproducible wet-state window\u2014not maximum wetness.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-d38fcec9\">Dry Pretreatment: Dry Add-On Becomes More Visible<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2eba4446\">In the conventional dry route:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-77c2ca10\"><strong>Pretreat \u2192 Dry \u2192 Print \u2192 Steam \/ Fix \u2192 Wash<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2762b12a\">most carrier water is removed before printing.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9f72dab6\">Therefore, the remaining dry chemistry becomes a central variable.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a8b616af\">However, the drying process can redistribute that chemistry.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ff0de7a0\">Two fabrics with equal total dry add-on can still differ if:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>One has more surface-localized polymer.<\/li>\n\n\n\n<li>One has more face-to-back migration.<\/li>\n\n\n\n<li>One has uneven alkali distribution.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-938391a4\">Dry add-on should therefore be connected to distribution\u2014not treated as the complete pretreatment description.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-62d8b361\">Water Load and Drying Energy<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-540149e1\">Wet pick-up directly changes the amount of carrier water entering the dryer.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f318ee34\">Higher wet pick-up generally increases:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Water to evaporate<\/li>\n\n\n\n<li>Drying energy<\/li>\n\n\n\n<li>Required residence time<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7a80b43e\">Textile finishing references have long used lower-wet-pick-up application methods to reduce drying load when the same required dry add-on can be maintained through a more concentrated bath.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c9c46838\">But lower wet pick-up is not automatically better.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-20964962\">The pretreatment must still:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Apply uniformly<\/li>\n\n\n\n<li>Wet the textile correctly<\/li>\n\n\n\n<li>Deliver the required chemical add-on<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-e21f705f\">Wet Pick-Up and Chemical Migration During Drying<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0ec0bff3\">More water means more liquid must move through and out of the textile during drying.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-90bab406\">Soluble pretreatment chemicals can move with that water.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-989f2413\">Possible effects include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Surface concentration changes<\/li>\n\n\n\n<li>Face-to-back migration<\/li>\n\n\n\n<li>Edge-center distribution differences<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5ab7d760\">Therefore, two routes with the same dry add-on but different wet pick-up can produce different final chemical distribution.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a9670dce\">This is another reason wet pick-up remains important even after dry add-on has been calculated.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-84518ab1\">Dry Add-On Does Not Describe Chemical Distribution<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e6eaf7ef\">Dry add-on is a mass value.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-652f7fc1\">It does not tell you whether chemistry is:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>On the printable face<\/li>\n\n\n\n<li>Inside yarns<\/li>\n\n\n\n<li>On the reverse side<\/li>\n\n\n\n<li>Even across fabric width<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1e6ab523\">For digital printing, distribution strongly affects:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ink localization<\/li>\n\n\n\n<li>Penetration<\/li>\n\n\n\n<li>Color yield<\/li>\n\n\n\n<li>Fixation<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-dde971f7\">Therefore:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-79d8b5b4\"><strong>Dry Add-On Controls \u201cHow Much\u201d; Application and Drying Control \u201cWhere.\u201d<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-9547d515\">Component-Specific Add-On: Polymer, Alkali and Urea<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f52f7a49\">Total dry solids can hide component differences.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8fe00416\">A reactive pretreatment may contain:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Migration-control polymer<\/li>\n\n\n\n<li>Alkali<\/li>\n\n\n\n<li>Urea \/ moisture-management chemistry<\/li>\n\n\n\n<li>Other auxiliaries<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-719c1b94\">For a fixed wet pick-up, the add-on of each component follows its concentration in the bath.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-dae4c2c0\">This means mills can calculate separate theoretical add-ons for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Polymer<\/li>\n\n\n\n<li>Alkali<\/li>\n\n\n\n<li>Urea<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-52862c33\">when troubleshooting color or fixation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-336c2edb\">This is more informative than total solids alone when the formulation itself changes.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-58810595\">Effect on Color Yield<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-dd783d9d\">Low chemical add-on can reduce the ability of pretreatment to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Control ink localization<\/li>\n\n\n\n<li>Provide sufficient alkali<\/li>\n\n\n\n<li>Manage moisture during fixation<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9124ddd8\">Increasing add-on into the useful range can improve post-wash color.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9dec76ff\">But:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-789c8587\"><strong>More Add-On \u2260 Unlimited Color Increase.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8d1b28ec\">Excess polymer or total chemistry can increase:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Surface-film thickness<\/li>\n\n\n\n<li>Drying demand<\/li>\n\n\n\n<li>Wash-off demand<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3ead5d3f\">and can change hand.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-54283147\">Build an add-on working curve instead of maximizing dosage.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-7aea8e71\">Effect on Bleeding and Edge Definition<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-198e6fe4\">Insufficient polymer add-on can reduce migration control.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c1799637\">Excessive wet pick-up can also create too much moisture before drying or printing.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-325b21b7\">Therefore, bleeding can appear at both ends of the process window for different reasons.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-14a38422\">Evaluate:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wet pick-up<\/li>\n\n\n\n<li>Polymer add-on<\/li>\n\n\n\n<li>Residual moisture<\/li>\n\n\n\n<li>Printed line width<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-79e15db1\">together.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-c026d600\">Effect on Ink Penetration<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ef48ab86\">The amount and location of polymer affect how deeply ink penetrates.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-18e90b50\">If dry polymer add-on is too low, ink can move deeper into the textile.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6a2d778e\">If polymer is high but distributed too deeply because wet pick-up is high, the surface may still not receive the same localization effect as a lower-pick-up surface-biased route.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a1840b3a\">Compare:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Face-side K\/S<\/li>\n\n\n\n<li>Reverse-side show-through<\/li>\n\n\n\n<li>Dry add-on<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-05632f81\">rather than treating total add-on alone as proof of correct distribution.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-91f7d3b2\">Effect on Reactive Dye Fixation<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-08d6f53c\">Reactive fixation depends on sufficient alkali and moisture.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0f442b79\">If wet pick-up or bath concentration changes, alkali add-on changes unless the formula is compensated.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f749a472\">This can produce:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Different fixation<\/li>\n\n\n\n<li>Different wash-off loss<\/li>\n\n\n\n<li>Different post-wash K\/S<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d3bdc14c\">For reactive printing, component-specific alkali add-on can therefore be more useful than total pretreatment solids when fixation is the problem.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-845ac001\">Effect on Wash-Off and Fabric Hand<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f61c7d3e\">Higher dry chemical add-on means more pretreatment material must remain useful during printing and later be removed or tolerated after fixation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ad2413b5\">Excessive add-on can increase:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wash-off demand<\/li>\n\n\n\n<li>Residual film<\/li>\n\n\n\n<li>Harsh or coated hand<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7b69603a\">The commercial target is the lowest stable chemical add-on that achieves the required:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Color<\/li>\n\n\n\n<li>Definition<\/li>\n\n\n\n<li>Fixation<\/li>\n\n\n\n<li>Fabric hand<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-941d2ea5\">Cotton<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-379ad45b\">Cotton wet pick-up varies with:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Scouring<\/li>\n\n\n\n<li>Mercerization<\/li>\n\n\n\n<li>GSM<\/li>\n\n\n\n<li>Weave \/ knit structure<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f254ddc7\">A pick-up target developed on one cotton construction should not be transferred automatically to another.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8ac8a262\">Normalize trials by:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Measured wet pick-up<\/li>\n\n\n\n<li>Calculated dry add-on<\/li>\n\n\n\n<li>Final print result<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-54e52486\">Viscose \/ Modal<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-79aaec6c\">Viscose and modal often absorb more liquid and swell strongly.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b301ac3e\">This can increase:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wet pick-up<\/li>\n\n\n\n<li>Water load<\/li>\n\n\n\n<li>Drying demand<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5d4c713b\">For viscose, a lower bath concentration may still produce high chemical add-on if wet pick-up is high.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e1af393d\">This is why bath recipe alone cannot define the treatment level.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-0e60daed\">Lyocell<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-950593f4\">Lyocell should be validated independently because moisture uptake and fabric construction can differ from both cotton and viscose.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1295d349\">Record actual wet pick-up and add-on rather than relying on fiber category alone.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-6cb04184\">Woven vs. Knit<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9028c895\">Knitted fabrics can change:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Width<\/li>\n\n\n\n<li>GSM<\/li>\n\n\n\n<li>Thickness<\/li>\n\n\n\n<li>Absorbency under tension<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4e696809\">during processing.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c5b1f6b6\">This can change measured wet pick-up even at the same padder pressure.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8f1d149e\">Woven fabrics are often dimensionally more stable but still require fabric-specific validation.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-81c8a794\">Widthwise Uniformity<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7eee18e7\">Average wet pick-up can hide left-center-right differences.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2e5ebdd4\">Use fixed positions such as:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7957b8ba\"><strong>Left \u2192 Left-Middle \u2192 Center \u2192 Right-Middle \u2192 Right<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0670ae1a\">At each position, compare:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wet pick-up \/ coating add-on<\/li>\n\n\n\n<li>Calculated dry add-on<\/li>\n\n\n\n<li>Residual moisture<\/li>\n\n\n\n<li>Post-wash K\/S<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8d6dbde6\">If dry add-on differs across width, investigate application uniformity before changing the formulation.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-1803e436\">Why Pick-Up and Add-On Drift During Production<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-415691cb\">Wet pick-up can drift because of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Roll wear \/ pressure changes<\/li>\n\n\n\n<li>Fabric-lot changes<\/li>\n\n\n\n<li>Line-speed changes<\/li>\n\n\n\n<li>Bath viscosity \/ temperature changes<\/li>\n\n\n\n<li>Fabric tension changes<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2d2705fb\">Bath concentration can drift because of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Water evaporation<\/li>\n\n\n\n<li>Make-up errors<\/li>\n\n\n\n<li>Incorrect replenishment<\/li>\n\n\n\n<li>Incomplete mixing<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-80e1966e\">This means dry chemical add-on can drift even when only one side of the equation changes.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5258bc6f\">Monitor both.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-dfef1dcb\">Calculated Add-On vs. Measured Add-On<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-672f6cf4\">Calculated add-on is useful for process design and daily control.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b4c4623e\">But it is theoretical.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-51ed2a5e\">Measured add-on can be useful for verification, especially when:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A new application route is introduced.<\/li>\n\n\n\n<li>A new product has different solids.<\/li>\n\n\n\n<li>Production differs from laboratory results.<\/li>\n\n\n\n<li>Bath carryover or nonuniformity is suspected.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4d548399\">Calculated and measured values should be compared on the same conditioned mass basis.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-bdf8141d\">How to Verify Dry Add-On<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-41ff509d\">A gravimetric verification can compare the conditioned fabric mass before treatment with the conditioned dry mass after pretreatment and drying.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1f7d1d6a\">However, the method must account for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Residual moisture<\/li>\n\n\n\n<li>Fabric conditioning<\/li>\n\n\n\n<li>Natural fabric-weight variability<\/li>\n\n\n\n<li>Volatile or thermally changing components<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8fb37710\">For critical component-specific verification, a chemical analytical method may be more appropriate than total weight gain.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e9f6478d\">Routine production usually relies on:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a41445ff\"><strong>Controlled Bath Concentration + Measured Pick-Up + Periodic Verification<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-0bd66a7e\">Wet Pick-Up vs. Dry Add-On Control Table<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Parameter<\/th><th>What It Tells You<\/th><th>Best Use<\/th><\/tr><\/thead><tbody><tr><td>Wet pick-up<\/td><td>How much liquor the fabric retains<\/td><td>Padding \/ application control, water load<\/td><\/tr><tr><td>Bath concentration<\/td><td>How much chemistry exists per unit liquor<\/td><td>Formula \/ preparation control<\/td><\/tr><tr><td>Calculated dry add-on<\/td><td>How much chemistry should reach the fabric<\/td><td>Dosage comparison \/ process design<\/td><\/tr><tr><td>Measured dry add-on<\/td><td>How much total retained dry mass is actually present<\/td><td>Verification \/ troubleshooting<\/td><\/tr><tr><td>Residual moisture<\/td><td>How much water remains after drying<\/td><td>Printing \/ fixation moisture control<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-19cff925\">No single column replaces the others.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-b47e6a7f\">Build a Pick-Up \u00d7 Solids Working Window<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Condition<\/th><th>Wet Pick-Up<\/th><th>Bath Solids<\/th><th>Calculated Add-On<\/th><th>Print Evaluation<\/th><\/tr><\/thead><tbody><tr><td>A<\/td><td>Lower<\/td><td>Reference<\/td><td>Calculate<\/td><td>Color \/ bleeding \/ penetration<\/td><\/tr><tr><td>B<\/td><td>Reference<\/td><td>Reference<\/td><td>Control<\/td><td>Current benchmark<\/td><\/tr><tr><td>C<\/td><td>Higher<\/td><td>Reference<\/td><td>Calculate<\/td><td>Drying \/ hand \/ wash-off<\/td><\/tr><tr><td>D<\/td><td>Reference<\/td><td>Lower<\/td><td>Calculate<\/td><td>Chemical sensitivity<\/td><\/tr><tr><td>E<\/td><td>Reference<\/td><td>Higher<\/td><td>Calculate<\/td><td>Add-on sensitivity<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b35976ac\">Change one factor at a time in the first screen.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-751458c6\">Then test interactions only after the individual effects are understood.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-18595902\">Build a Same-Add-On \/ Different-Pick-Up Matrix<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6143927e\">This is one of the most useful advanced trials.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7c39dbe5\">Create two or more conditions with approximately the same dry chemical add-on but different wet pick-up.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a0ce4ea2\">For example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Higher pick-up + lower solids<\/li>\n\n\n\n<li>Lower pick-up + higher solids<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6960e91f\">Then compare:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Drying energy \/ time<\/li>\n\n\n\n<li>Residual moisture<\/li>\n\n\n\n<li>Chemical migration<\/li>\n\n\n\n<li>Bleeding<\/li>\n\n\n\n<li>Penetration<\/li>\n\n\n\n<li>Post-wash K\/S<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-65a48770\">This reveals whether the process is sensitive to the water carrier independently from the dry chemical dose.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-ba91dd78\">Recommended Laboratory Workflow<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Condition and weigh one representative dry fabric lot.<\/strong><\/li>\n\n\n\n<li><strong>Prepare the pretreatment at a measured bath concentration \/ solids level.<\/strong><\/li>\n\n\n\n<li><strong>Apply under a defined padding, coating or spray condition.<\/strong><\/li>\n\n\n\n<li><strong>Measure actual wet pick-up \/ wet add-on immediately.<\/strong><\/li>\n\n\n\n<li><strong>Calculate total and component-specific theoretical add-on.<\/strong><\/li>\n\n\n\n<li><strong>Dry under controlled conditions.<\/strong><\/li>\n\n\n\n<li><strong>Measure residual moisture.<\/strong><\/li>\n\n\n\n<li><strong>Where needed, verify dry add-on gravimetrically.<\/strong><\/li>\n\n\n\n<li><strong>Print one diagnostic pattern.<\/strong><\/li>\n\n\n\n<li><strong>Steam \/ fix and wash identically.<\/strong><\/li>\n\n\n\n<li><strong>Compare K\/S, bleeding, penetration, fastness and hand.<\/strong><\/li>\n\n\n\n<li><strong>Build a production working window rather than one perfect number.<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0216ae6d\">For controlled pretreatment matching, use&nbsp;<a href=\"https:\/\/fsxchemical.com\/service\/samples-matching\/\">Samples &amp; Matching<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-1c9378de\">Production Control Plan<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5b367849\">A practical production sheet can record:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fabric fiber \/ construction \/ GSM<\/li>\n\n\n\n<li>Bath product concentration<\/li>\n\n\n\n<li>Bath solids \/ active content where relevant<\/li>\n\n\n\n<li>Bath density where required<\/li>\n\n\n\n<li>Bath pH \/ viscosity \/ temperature<\/li>\n\n\n\n<li>Measured wet pick-up<\/li>\n\n\n\n<li>Calculated dry add-on<\/li>\n\n\n\n<li>Widthwise variation<\/li>\n\n\n\n<li>Dryer temperature \/ speed<\/li>\n\n\n\n<li>Residual moisture<\/li>\n\n\n\n<li>Post-wash color \/ quality checks<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bc512eb0\">Production does not need to measure every variable continuously.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-de249840\">The control plan should identify:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Which variables are checked every run<\/li>\n\n\n\n<li>Which are checked periodically<\/li>\n\n\n\n<li>Which trigger a requalification<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b9b4a8f4\">The objective is stable chemical delivery\u2014not paperwork for its own sake.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-1fe8da97\">Common Pick-Up \/ Add-On Mistakes<\/h2>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-fe9141c7\">1. Treating Wet Pick-Up as Chemical Add-On<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4067344a\">Wet pick-up includes mostly carrier liquid; chemical add-on depends on bath concentration.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-f9f9cb7a\">2. Controlling Only Bath Concentration<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-78ab6346\">The same bath can deliver different chemistry when pick-up changes.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-b27efeda\">3. Comparing Two Products Without Correcting for Solids<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1e2fbe0b\">Liquid products with different active solids should not be compared by supplied-product dosage alone.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-b6a4167b\">4. Comparing Padding and Spray by Liters Used<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-49b99b1e\">Actual deposited dry active mass is the more useful basis.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-561cc813\">5. Assuming Same Dry Add-On Means Same Process<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bacd934e\">Different wet pick-up changes water load, drying and migration.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-1ba1008f\">6. Measuring Pick-Up Too Late<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e052c2b3\">Evaporation between application and weighing lowers the measured wet weight.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-c698013d\">7. Ignoring Residual Moisture in Dry-Add-On Verification<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2fe9c1d6\">Moisture regain can distort gravimetric dry-add-on measurements.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-2dc1b4a2\">8. Maximizing Dry Add-On<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-616ec1f9\">Excess chemistry can increase wash-off demand, hand problems and cost without improving print quality.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-6c04d813\">Troubleshooting Table<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Observed Problem<\/th><th>First Variables to Check<\/th><th>Do Not Assume<\/th><\/tr><\/thead><tbody><tr><td>Wet pick-up stable but color changes<\/td><td>Bath concentration \/ solids, ink, fixation<\/td><td>Pick-up proves chemical add-on is unchanged<\/td><\/tr><tr><td>Bath concentration stable but color changes<\/td><td>Actual pick-up, fabric absorbency, application uniformity<\/td><td>Same recipe means same fabric dose<\/td><\/tr><tr><td>Same dry add-on but drying behavior differs<\/td><td>Wet pick-up \/ water load, fabric structure<\/td><td>Equal add-on creates an equivalent process<\/td><\/tr><tr><td>High pick-up causes bleeding<\/td><td>Residual moisture, polymer add-on, drying<\/td><td>More chemistry always improves control<\/td><\/tr><tr><td>Low pick-up gives weak post-wash color<\/td><td>Polymer \/ alkali add-on, steaming<\/td><td>More ink is the first correction<\/td><\/tr><tr><td>Production differs from lab<\/td><td>Actual pick-up, bath solids, drying, width profile<\/td><td>Lab machine settings transfer directly<\/td><\/tr><tr><td>Liquid product appears inefficient vs. powder<\/td><td>Product solids \/ active content and actual add-on<\/td><td>Equal kg dosage means equal dry chemistry<\/td><\/tr><tr><td>Measured dry add-on looks too high<\/td><td>Conditioning, residual moisture, fabric-weight variation<\/td><td>All measured weight gain is pretreatment solids<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-6654000c\">Total Cost in Use<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-663d30e5\">Wet pick-up and dry add-on affect cost in different ways.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1a872b13\">Wet pick-up changes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Water load<\/li>\n\n\n\n<li>Drying energy<\/li>\n\n\n\n<li>Line capacity<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-48ccdfb4\">Dry add-on changes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chemical consumption<\/li>\n\n\n\n<li>Wash-off demand<\/li>\n\n\n\n<li>Fabric hand<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5d0cc12a\">A useful model is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1f2afd66\"><strong>Total Cost in Use = Pretreatment Dry Add-On + Water \/ Drying + Printing + Fixation + Washing + Rework + Quality Loss<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c4e47c99\">The lowest-cost process is not automatically the lowest wet pick-up or lowest chemical add-on.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0b66a46d\">It is the lowest stable combination that delivers the required finished quality.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-e4858971\">What Information Should You Send to a Supplier?<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-47bc031f\">For useful pick-up \/ add-on matching, provide:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fabric fiber \/ construction \/ GSM<\/li>\n\n\n\n<li>Current pretreatment product \/ TDS<\/li>\n\n\n\n<li>Product solids \/ active content if known<\/li>\n\n\n\n<li>Bath concentration<\/li>\n\n\n\n<li>Application method<\/li>\n\n\n\n<li>Measured wet pick-up \/ coating \/ spray add-on<\/li>\n\n\n\n<li>Calculated or measured dry add-on if available<\/li>\n\n\n\n<li>Bath viscosity \/ pH<\/li>\n\n\n\n<li>Drying conditions<\/li>\n\n\n\n<li>Residual moisture<\/li>\n\n\n\n<li>Ink system<\/li>\n\n\n\n<li>Steaming \/ washing<\/li>\n\n\n\n<li>Main target: lower chemical cost, lower drying load, better color, less bleeding or more uniform fixation<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bd2489ce\">FSX Chemical can use this information through&nbsp;<a href=\"https:\/\/fsxchemical.com\/service\/samples-matching\/\">Samples &amp; Matching<\/a>&nbsp;to compare pretreatment dosage on a consistent dry-add-on basis.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4e66c239\">Review&nbsp;<a href=\"https:\/\/fsxchemical.com\/product\/digital-printing-paste\/\">Digital Textile Printing Pretreatment<\/a>,&nbsp;<a href=\"https:\/\/fsxchemical.com\/blog\/textile-printing-thickener-testing-parameters\/\">Textile Printing Thickener Testing Parameters<\/a>&nbsp;and&nbsp;<a href=\"https:\/\/fsxchemical.com\/applications\/\">Textile Printing Applications<\/a>&nbsp;for related process control.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-852a484c\">How Should a Mill Control Wet Pick-Up and Dry Chemical Add-On?<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6bbe790c\">A practical workflow is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1da25321\"><strong>Control Bath Concentration \u2192 Measure Actual Wet Pick-Up \u2192 Calculate Chemical Add-On \u2192 Verify Width Uniformity \u2192 Dry \u2192 Measure Residual Moisture \u2192 Print \u2192 Fix \u2192 Wash \u2192 Confirm Final Performance<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bd303ee4\">The key principles are:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Wet pick-up tells you how much pretreatment liquor the fabric retained; it does not directly tell you how much dry chemistry was delivered.<\/strong><\/li>\n\n\n\n<li><strong>Dry chemical add-on is calculated from wet pick-up and bath active concentration, but the calculation should use compatible mass bases and product solids where relevant.<\/strong><\/li>\n\n\n\n<li><strong>Wet pick-up remains important even when dry add-on is matched because it changes water load, drying and chemical migration.<\/strong><\/li>\n\n\n\n<li><strong>Dry add-on tells you how much chemistry is present but not where it is distributed through or across the textile.<\/strong><\/li>\n\n\n\n<li><strong>For production, wet pick-up is an excellent application-control variable while dry add-on is a stronger chemistry-normalization variable.<\/strong><\/li>\n\n\n\n<li><strong>The most reliable digital pretreatment process controls both and validates the final result after fixation and washing.<\/strong><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-a16393e0\">Frequently Asked Questions<\/h2>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-e0096525\">1. What is wet pick-up in digital textile pretreatment?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c24997cf\">It is the mass of pretreatment liquor retained by the fabric after application, expressed relative to the original dry fabric mass.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-2be11645\">2. What is dry chemical add-on?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6a7d18be\">It is the amount of dry or active pretreatment chemistry delivered to the fabric relative to the untreated dry fabric mass.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-d0e9602c\">3. How do I calculate wet pick-up?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-daa91feb\">Wet Pick-Up (%) = (Wet Fabric Weight \u2212 Dry Fabric Weight) \u00f7 Dry Fabric Weight \u00d7 100.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-5e8f7a27\">4. How do I calculate dry add-on?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c3cb5cc6\">For a homogeneous bath on a compatible mass basis, Dry Add-On (%) = Wet Pick-Up (%) \u00d7 Active Bath Concentration (wt%) \u00f7 100.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-18cb9374\">5. Which is more important: wet pick-up or dry add-on?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8a8ce67d\">Both. Wet pick-up controls liquid and water load; dry add-on describes chemistry dosage. Production should link the two rather than choose one.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-45198c7d\">6. Can two fabrics have the same wet pick-up but different chemical add-on?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b8c40a8f\">Yes. If bath concentration differs, the dry chemical add-on differs even when wet pick-up is identical.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-a5a240a7\">7. Can two processes have the same dry add-on but different wet pick-up?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bec5ceb2\">Yes. A lower-pick-up process can use a more concentrated bath to achieve similar dry add-on. Drying and migration can still differ.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-22e35063\">8. Is dry add-on the same as pretreatment product dosage?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-801a18ec\">Not always. Liquid commercial products may contain only part active solids, so product concentration and product solids content must both be considered.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-1aa27882\">9. Why is bath density important when using g\/L?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-88380c38\">Because g\/L is mass per liquid volume, while add-on calculations are often performed on a mass fraction basis. Bath density allows conversion to wt% more accurately.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-7af0d053\">10. Should coating and spray also be controlled by wet pick-up?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e19aec17\">The same mass-balance principle applies, but wet\/dry coating weight or deposited spray add-on may be more practical than padding-style wet pick-up.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-9e2dc355\">11. Why can equal dry add-on produce different color?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c5c33033\">Because water load, penetration, drying, migration and where the chemistry is located can differ even when total retained dry mass is equal.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-b690ea35\">12. What should I send FSX Chemical for pick-up and add-on troubleshooting?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8dc44773\">Send the fabric, current pretreatment\/TDS, product solids if known, bath concentration, measured pick-up or wet add-on, application route, drying, moisture, ink, steaming and final print problem.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-fd52a2a8\">Control the Liquid Applied and the Chemistry Left Behind<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0a7f492a\">If your digital textile pretreatment shows unstable color, bleeding, drying cost or fabric-to-fabric variation, FSX Chemical can help separate wet pick-up from actual dry chemical add-on and build a controlled trial around your fabric and application equipment.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d04da806\">Start with&nbsp;<a href=\"https:\/\/fsxchemical.com\/service\/samples-matching\/\">Samples &amp; Matching<\/a>&nbsp;and provide your current bath concentration, product solids and measured application add-on.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b79b34f7\">Review\u00a0<a href=\"https:\/\/fsxchemical.com\/product\/digital-printing-paste\/\">Digital Textile Printing Pretreatment<\/a>\u00a0for current FSX pretreatment routes\ud83d\udce7\u00a0<strong>Email<a href=\"https:\/\/fsxchemical.com\/contact-us\/\">: Service@fsxchemical.com<\/a><\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a2fed840\"><strong>The correct control strategy is not wet pick-up versus dry add-on. Wet pick-up controls how much liquor and water enter the fabric; dry add-on controls how much chemistry remains. Stable digital pretreatment requires both numbers to remain inside a validated process window, together with uniform distribution, controlled drying and acceptable final printing performance.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u201cH\u1ea5p th\u1ee5 \u01b0\u1edbt\u201d v\u00e0 \u201cl\u01b0\u1ee3ng h\u00f3a ch\u1ea5t b\u00e1m d\u00ednh kh\u00f4\u201d m\u00f4 t\u1ea3 hai kh\u00eda c\u1ea1nh kh\u00e1c nhau c\u1ee7a qu\u00e1 tr\u00ecnh ti\u1ec1n x\u1eed l\u00fd d\u1ec7t may k\u1ef9 thu\u1eadt s\u1ed1. \u201cH\u1ea5p th\u1ee5 \u01b0\u1edbt\u201d cho nh\u00e0 m\u00e1y bi\u1ebft l\u01b0\u1ee3ng dung d\u1ecbch ti\u1ec1n x\u1eed l\u00fd m\u00e0 v\u1ea3i gi\u1eef l\u1ea1i sau khi x\u1eed l\u00fd, trong khi \u201cl\u01b0\u1ee3ng h\u00f3a ch\u1ea5t b\u00e1m d\u00ednh kh\u00f4\u201d cho nh\u00e0 m\u00e1y bi\u1ebft l\u01b0\u1ee3ng h\u00f3a ch\u1ea5t kh\u00f4ng bay h\u01a1i th\u1ef1c s\u1ef1 b\u00e1m tr\u00ean v\u1ea3i sau khi n\u01b0\u1edbc \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf. Do \u0111\u00f3, \u0111\u1ed9 h\u1ea5p th\u1ee5 \u01b0\u1edbt l\u00e0 m\u1ed9t th\u00f4ng s\u1ed1 quan tr\u1ecdng li\u00ean quan \u0111\u1ebfn m\u00e1y m\u00f3c v\u00e0 ki\u1ec3m so\u00e1t \u0111\u1ed9 \u1ea9m; trong khi l\u01b0\u1ee3ng h\u00f3a ch\u1ea5t kh\u00f4 b\u00e1m d\u00ednh l\u00e0 th\u00f4ng s\u1ed1 tr\u1ef1c ti\u1ebfp h\u01a1n v\u1ec1 h\u00f3a ch\u1ea5t v\u00e0 li\u1ec1u l\u01b0\u1ee3ng. Kh\u00f4ng n\u00ean s\u1eed d\u1ee5ng ri\u00eang l\u1ebb b\u1ea5t k\u1ef3 th\u00f4ng s\u1ed1 n\u00e0o trong hai th\u00f4ng s\u1ed1 n\u00e0y. M\u1ed9t quy tr\u00ecnh s\u1ea3n xu\u1ea5t \u1ed5n \u0111\u1ecbnh s\u1ebd ki\u1ec3m so\u00e1t n\u1ed3ng \u0111\u1ed9 dung d\u1ecbch x\u1eed l\u00fd, \u0111o l\u01b0\u1eddng \u0111\u1ed9 h\u1ea5p th\u1ee5 \u01b0\u1edbt ho\u1eb7c l\u01b0\u1ee3ng h\u00f3a ch\u1ea5t \u01b0\u1edbt b\u00e1m d\u00ednh, t\u00ednh to\u00e1n l\u01b0\u1ee3ng h\u00f3a ch\u1ea5t b\u00e1m d\u00ednh thu \u0111\u01b0\u1ee3c, ki\u1ec3m tra qu\u00e1 tr\u00ecnh s\u1ea5y kh\u00f4 v\u00e0 \u0111\u1ed9 \u1ea9m c\u00f2n l\u1ea1i, sau \u0111\u00f3 x\u00e1c nh\u1eadn ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m in ho\u00e0n thi\u1ec7n sau khi c\u1ed1 \u0111\u1ecbnh v\u00e0 gi\u1eb7t.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_titles_title":"Wet Pick-Up vs. Dry Chemical Add-On in Digital Textile Pretreatment: Which Number Should You Control?","_seopress_titles_desc":"Learn the difference between wet pick-up and dry chemical add-on in digital textile pretreatment, how to calculate both, and which values should be controlled in production.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","footnotes":""},"categories":[1],"tags":[1628,1142,1641,1642,1623,1599,1322,1446],"class_list":["post-11570","post","type-post","status-publish","format-standard","hentry","category-technical-guides","tag-chemical-add-on","tag-digital-textile-printing","tag-dry-chemical-add-on","tag-dry-solids","tag-fabric-padding","tag-pretreatment","tag-reactive-inkjet-printing","tag-wet-pick-up"],"acf":[],"_links":{"self":[{"href":"https:\/\/fsxchemical.com\/vi\/wp-json\/wp\/v2\/posts\/11570","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fsxchemical.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fsxchemical.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fsxchemical.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fsxchemical.com\/vi\/wp-json\/wp\/v2\/comments?post=11570"}],"version-history":[{"count":2,"href":"https:\/\/fsxchemical.com\/vi\/wp-json\/wp\/v2\/posts\/11570\/revisions"}],"predecessor-version":[{"id":11572,"href":"https:\/\/fsxchemical.com\/vi\/wp-json\/wp\/v2\/posts\/11570\/revisions\/11572"}],"wp:attachment":[{"href":"https:\/\/fsxchemical.com\/vi\/wp-json\/wp\/v2\/media?parent=11570"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fsxchemical.com\/vi\/wp-json\/wp\/v2\/categories?post=11570"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fsxchemical.com\/vi\/wp-json\/wp\/v2\/tags?post=11570"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}