{"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\/bn\/blog\/wet-pick-up-vs-dry-chemical-add-on-digital-textile-pretreatment\/","title":{"rendered":"Wet Pick-Up vs. Dry Chemical Add-On in Digital Textile Pretreatment: Which Number Should You Control?"},"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>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.<\/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\/bn\/wp-json\/wp\/v2\/posts\/11570","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fsxchemical.com\/bn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fsxchemical.com\/bn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fsxchemical.com\/bn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fsxchemical.com\/bn\/wp-json\/wp\/v2\/comments?post=11570"}],"version-history":[{"count":2,"href":"https:\/\/fsxchemical.com\/bn\/wp-json\/wp\/v2\/posts\/11570\/revisions"}],"predecessor-version":[{"id":11572,"href":"https:\/\/fsxchemical.com\/bn\/wp-json\/wp\/v2\/posts\/11570\/revisions\/11572"}],"wp:attachment":[{"href":"https:\/\/fsxchemical.com\/bn\/wp-json\/wp\/v2\/media?parent=11570"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fsxchemical.com\/bn\/wp-json\/wp\/v2\/categories?post=11570"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fsxchemical.com\/bn\/wp-json\/wp\/v2\/tags?post=11570"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}