{"id":4365,"date":"2025-11-24T00:00:40","date_gmt":"2025-11-24T00:00:40","guid":{"rendered":"https:\/\/fsxchemical.com\/?p=4365"},"modified":"2026-07-03T03:39:22","modified_gmt":"2026-07-03T03:39:22","slug":"the-purity-of-sodium-alginate-in-textile-printing-the-meaning-and-importance-of-specifications","status":"publish","type":"post","link":"https:\/\/fsxchemical.com\/ur\/blog\/the-purity-of-sodium-alginate-in-textile-printing-the-meaning-and-importance-of-specifications\/","title":{"rendered":"The Purity Of Sodium Alginate In Textile Printing: The Meaning And Importance Of Specifications"},"content":{"rendered":"<p class=\"wp-block-wd-paragraph wd-924058a9\">P<a href=\"https:\/\/fsxchemical.com\/ur\/applications\/sodium-alginate-application\/\" data-type=\"page\" data-id=\"6069\">urity is one of the specification parameters listed on sodium alginate technical datasheets, but it is not always clear what purity levels mean in practice for textile printing applications, or how much weight to give it relative to viscosity grade and degree of substitution when evaluating suppliers.<\/a><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e7a1c123\"><a href=\"https:\/\/fsxchemical.com\/ur\/applications\/sodium-alginate-application\/\" data-type=\"page\" data-id=\"6069\">This guide explains what sodium alginate purity specifications cover, how impurities can affect paste performance and print quality, and what purity level is appropriate for different textile printing applications.<\/a><\/p>\n\n\n\n<div class=\"wp-block-wd-divider wd-style-line wd-573ed9ba\"><\/div>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-30817f9c\">What Sodium Alginate Purity Specifications Cover<\/h2>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-01be4414\">Active Content and Common Impurities<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0c12e0d2\"><a href=\"https:\/\/fsxchemical.com\/ur\/applications\/sodium-alginate-application\/\" data-type=\"page\" data-id=\"6069\">Sodium alginate purity is typically expressed as active content \u2014 the percentage of the dry product that is actual sodium alginate polymer, as opposed to residual impurities from the manufacturing process. The main impurities in industrial sodium alginate are:<\/a><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Sodium chloride (NaCl)<\/strong> \u2014 the most significant impurity by volume, a byproduct of the sodium alginate synthesis and purification process<\/li>\n\n\n\n<li><strong>Sodium glycolate<\/strong> \u2014 another synthesis byproduct present at lower concentrations<\/li>\n\n\n\n<li><strong>Insoluble matter<\/strong> \u2014 undissolved particles that remain after standard dissolution<\/li>\n\n\n\n<li><strong>Heavy metals<\/strong> \u2014 trace elements from the seaweed raw material and processing equipment, typically measured separately and expressed in mg\/kg<\/li>\n\n\n\n<li><strong>\u0646\u0645\u06cc<\/strong> \u2014 water content in the powder, which affects the effective concentration of active material per unit weight<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4ddaa679\">I<a href=\"https:\/\/fsxchemical.com\/ur\/applications\/sodium-alginate-application\/\" data-type=\"page\" data-id=\"6069\">ndustrial-grade sodium alginate for textile applications typically has active content specifications starting at around 70% or above, with the balance being primarily NaCl. Higher-purity grades \u2014 used in food, pharmaceutical, or precision industrial applications \u2014 have active content specifications of 99% or higher with tightly controlled NaCl limits.<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-1817e9f2\">How Purity Is Measured and Reported<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0cf56ddc\">Active content in sodium alginate is typically measured on a dry-weight basis \u2014 the sample is dried to remove moisture before measurement. This means that a product with stated purity of 80% on a dry basis may have a lower effective active content on an as-received basis if the moisture content is significant.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-582e511b\">When comparing purity specifications between suppliers, confirm whether the stated value is on a dry basis or an as-received basis, and what the moisture specification is. A product with 85% active content (dry basis) and 10% moisture has an effective active content of approximately 76.5% as received \u2014 meaningfully lower than the dry-basis figure suggests.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img alt=\"\" loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/printing-paste-viscosity-testing-analysis-4.jpg-2-4-768x1024.jpg\" class=\"wp-image-7946\" style=\"aspect-ratio:0.7499961852445258;width:437px;height:auto\" srcset=\"https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/printing-paste-viscosity-testing-analysis-4.jpg-2-4-768x1024.jpg 768w, https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/printing-paste-viscosity-testing-analysis-4.jpg-2-4-225x300.jpg 225w, https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/printing-paste-viscosity-testing-analysis-4.jpg-2-4-600x800.jpg 600w, https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/printing-paste-viscosity-testing-analysis-4.jpg-2-4-150x200.jpg 150w, https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/printing-paste-viscosity-testing-analysis-4.jpg-2-4.jpg 1086w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-wd-divider wd-style-line wd-672b0a87\"><\/div>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-357c89bc\">How Impurities Affect Textile Printing Paste Performance<\/h2>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-c96545ec\">Effect of Sodium Chloride on Paste Viscosity<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-13125331\"><a href=\"https:\/\/fsxchemical.com\/ur\/applications\/sodium-alginate-application\/\" data-type=\"page\" data-id=\"6069\">Sodium chloride is the most practically significant impurity for textile printing paste applications. NaCl is a monovalent salt that affects the ionic environment of the sodium alginate solution. At higher concentrations, NaCl suppresses the electrostatic repulsion between negatively charged alginate chains, causing them to pack more closely together \u2014 which reduces solution viscosity.<\/a><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5e53869f\">This means that two sodium alginate grades with the same stated viscosity specification but different NaCl content may produce different paste viscosity when dissolved at the same concentration in soft water. The lower-purity grade with higher NaCl content will typically produce lower paste viscosity than expected from the TDS value, because the TDS viscosity may have been measured under conditions that partially account for the ionic content of that specific grade.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1c23b6fb\">If you are switching between sodium alginate grades or suppliers and observing unexpected paste viscosity, NaCl content is one of the first variables to investigate. Request NaCl content data from both your current and prospective supplier and compare.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-b1286a44\">Effect of Insoluble Matter on Screen Printing<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0dc736a9\">Insoluble matter in sodium alginate \u2014 particles that do not dissolve under standard preparation conditions \u2014 can accumulate in screen mesh openings during printing. Fine screen mesh used for detailed patterns is more susceptible to blockage from insoluble particles than coarser mesh used for large-area prints.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0fa3f8cc\">Screen blockage from insoluble matter causes uneven paste transfer, incomplete pattern coverage, and the need for more frequent screen cleaning during a production run. For fine-line printing where screen mesh is tight, specifying a sodium alginate grade with lower insoluble matter (expressed as water-insoluble content on the TDS) is a practical quality measure.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-12f79c9b\">Insoluble matter is typically specified as a maximum percentage in the TDS \u2014 for example, water-insoluble content \u2264 0.6%. Lower values indicate a cleaner product with less risk of screen-related printing problems.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-17258ddd\">Effect of Heavy Metals on Fabric and Dye Interaction<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-515ef68d\">Trace heavy metals \u2014 particularly calcium, iron, and manganese \u2014 present in sodium alginate can interact with reactive dyes and affect print quality. Calcium and other divalent metals can crosslink alginate chains and increase paste viscosity or cause gelling at elevated concentrations. Iron can catalyze oxidative degradation of dyes and affect shade consistency.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4c71229d\">For most standard industrial textile printing applications, heavy metal levels in commercial sodium alginate are low enough not to cause significant problems. However, for color-sensitive applications where shade consistency is critical \u2014 or where buyer specifications include limits on heavy metal content in textile chemicals \u2014 requesting heavy metal analysis data from your supplier is worthwhile.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d13a9f87\">Heavy metal content is typically reported in mg\/kg (ppm) for individual metals. Common specifications include limits on total heavy metals and on specific metals of concern such as lead, arsenic, and mercury.<\/p>\n\n\n\n<div class=\"wp-block-wd-divider wd-style-line wd-2790e6de\"><\/div>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-78f00df3\"><a href=\"https:\/\/fsxchemical.com\/ur\/applications\/digta-printe-application\/\" data-type=\"page\" data-id=\"6094\">Purity Requirements by Application in Textile Printing<\/a><\/h2>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-bfae5348\">Standard Reactive Dye Screen Printing<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-892063e3\">For standard reactive dye flat screen and rotary screen printing on cotton, medium-purity industrial grades are generally adequate. The primary performance requirements \u2014 viscosity, DS, and solubility \u2014 are typically met by grades with active content in the range of 70% to 85% (dry basis), provided that NaCl content is within an acceptable range for your paste formulation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c501b893\">If your paste formulation uses hard water or contains other ionic components (alkali, salt), the impact of NaCl from the sodium alginate itself is proportionally smaller. For operations using softened or deionized water where ionic content is tightly controlled, the NaCl contribution from lower-purity alginate grades becomes more significant and may warrant specifying a higher-purity grade.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img alt=\"\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/Digital-printing-on-fabric-roll-to-roll-2-3-1024x576.webp\" class=\"wp-image-7941\" style=\"aspect-ratio:1.7777844545263348;width:537px;height:auto\" srcset=\"https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/Digital-printing-on-fabric-roll-to-roll-2-3-1024x576.webp 1024w, https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/Digital-printing-on-fabric-roll-to-roll-2-3-300x169.webp 300w, https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/Digital-printing-on-fabric-roll-to-roll-2-3-768x432.webp 768w, https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/Digital-printing-on-fabric-roll-to-roll-2-3-1536x864.webp 1536w, https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/Digital-printing-on-fabric-roll-to-roll-2-3-600x338.webp 600w, https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/Digital-printing-on-fabric-roll-to-roll-2-3-150x84.webp 150w, https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/Digital-printing-on-fabric-roll-to-roll-2-3.webp 1672w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-415bec48\"><a href=\"https:\/\/fsxchemical.com\/ur\/applications\/digta-printe-application\/\" data-type=\"page\" data-id=\"6094\">Fine-Line and High-Detail Printing<\/a><\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f4730e4e\">For fine-line printing with tight screen mesh \u2014 detailed pattern work, fine-count yarn substrates, or high-resolution designs \u2014 lower insoluble matter and more consistent viscosity become more important. In these applications, specifying a grade with tighter insoluble matter limits and documented batch-to-batch viscosity consistency is a practical quality measure.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3dace977\"><a href=\"https:\/\/fsxchemical.com\/ur\/applications\/digta-printe-application\/\" data-type=\"page\" data-id=\"6094\">Higher-purity grades are not always necessary for fine-line printing \u2014 a medium-purity grade with low insoluble matter and consistent viscosity may perform adequately. The key is to confirm insoluble matter specification and viscosity batch consistency, not simply to specify the highest available purity.<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-253bd354\">Digital Pre-Treatment Formulations<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-fc14685d\">For digital inkjet pre-treatment paste, sodium alginate is used at lower concentrations than in screen printing paste. At these concentrations, the relative contribution of NaCl from lower-purity grades to total ionic strength in the pre-treatment solution is higher than in concentrated screen paste. For pre-treatment applications where ionic content needs to be controlled, a higher-purity grade may be appropriate.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b081630b\">Insoluble matter is also more critical in pre-treatment applications, particularly in spray systems where undissolved particles can block spray nozzles. Specifying a grade with low insoluble matter content is recommended for spray pre-treatment systems regardless of whether overall purity is a primary concern.<\/p>\n\n\n\n<div class=\"wp-block-wd-divider wd-style-line wd-f6e4d11a\"><\/div>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-383b2816\">Comparing Purity Specifications Between Suppliers<\/h2>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-72f7238a\">What to Request Beyond the Active Content Number<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-57833d53\">Active content alone is not sufficient to evaluate sodium alginate purity for textile printing. When comparing grades from different suppliers, request the following in addition to the active content specification:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>NaCl content<\/strong> \u2014 maximum percentage on dry basis<\/li>\n\n\n\n<li><strong>Water-insoluble content<\/strong> \u2014 maximum percentage<\/li>\n\n\n\n<li><strong>Moisture content<\/strong> \u2014 to calculate effective active content as received<\/li>\n\n\n\n<li><strong>Heavy metal data<\/strong> \u2014 total heavy metals and any specific metals relevant to your buyer specifications<\/li>\n\n\n\n<li><strong>CoA from recent production batches<\/strong> \u2014 to verify that specification values are consistently achieved in practice<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-97c6f48c\">A supplier who can provide all of these data points promptly is operating to reasonable industrial supply standards. Reluctance to provide impurity data is worth noting in your evaluation.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-baf0e74a\">When Higher Purity Is Worth the Premium<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ffcdbf84\">Higher-purity sodium alginate grades cost more than standard industrial grades, and the premium is not always justified by performance requirements. Higher purity is worth specifying when:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Your paste formulation is sensitive to ionic content (low-salt paste systems, soft water preparation)<\/li>\n\n\n\n<li>Fine screen mesh is in use and insoluble matter causes screen blockage in your current grade<\/li>\n\n\n\n<li>Your buyer specifications include limits on impurity levels or heavy metal content in textile chemicals<\/li>\n\n\n\n<li>You are using sodium alginate in spray pre-treatment systems where particle contamination is a concern<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3a9a3df9\">For standard screen printing applications with medium to coarse mesh and no specific buyer impurity requirements, a medium-purity industrial grade with documented viscosity consistency will typically perform adequately at lower cost.<\/p>\n\n\n\n<div class=\"wp-block-wd-divider wd-style-line wd-6d6d8e84\"><\/div>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-cea29ca2\">Practical Steps for Evaluating Purity in Your Supply Chain<\/h2>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-56f8342c\">Running a Purity-Focused Supplier Comparison Trial<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-33f72938\">I<a href=\"https:\/\/fsxchemical.com\/ur\/%d8%ae%d9%90%d8%af%d9%85%d9%8e%d8%aa\/%d9%85%d8%b7%d8%a7%d8%a8%d9%82%d8%aa-%d9%be%d8%b0%db%8c%d8%b1-%d9%86%d9%85%d9%88%d9%86%db%92\/\" data-type=\"page\" data-id=\"5906\">f you are comparing sodium alginate grades with different purity levels, a structured trial gives you objective data for the decision. Prepare paste from each grade at the same concentration using the same water source, mixing procedure, and temperature. Measure and compare:<\/a><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Paste viscosity at preparation and after 24 hours of storage<\/li>\n\n\n\n<li>Visual clarity of the dissolved paste (cloudiness may indicate insoluble matter)<\/li>\n\n\n\n<li>Filtration behavior (pass a sample through a fine mesh and check for retained particles)<\/li>\n\n\n\n<li>Print quality on your standard fabric and screen, including pattern sharpness and screen behavior over a defined number of print strokes<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9662c140\">Document the results alongside the CoA data for each grade. This gives you a direct comparison of whether the purity difference translates into a meaningful performance difference in your specific application.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-61868be7\">Incorporating Purity Checks into Incoming Quality Control<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-762de081\">For operations where paste consistency is critical, incorporating basic purity checks into incoming material quality control is a practical safeguard. At minimum, measuring paste viscosity on a sample dissolved at a standard concentration confirms whether the received batch is within the viscosity range specified on the CoA.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5d3e0481\">For more rigorous control, insoluble matter testing on a sample of each incoming batch can be done with basic laboratory equipment (dissolution, filtration through a tared filter, drying, and weighing). This provides a direct measure of one of the most practically significant impurity parameters for screen printing applications.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img alt=\"\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/Rotary-screen-paste-feeding-system-1024x576.webp\" class=\"wp-image-7943\" style=\"aspect-ratio:1.7777844545263348;width:548px;height:auto\" srcset=\"https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/Rotary-screen-paste-feeding-system-1024x576.webp 1024w, https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/Rotary-screen-paste-feeding-system-300x169.webp 300w, https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/Rotary-screen-paste-feeding-system-768x432.webp 768w, https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/Rotary-screen-paste-feeding-system-1536x864.webp 1536w, https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/Rotary-screen-paste-feeding-system-600x338.webp 600w, https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/Rotary-screen-paste-feeding-system-150x84.webp 150w, https:\/\/fsxchemical.com\/wp-content\/uploads\/2025\/11\/Rotary-screen-paste-feeding-system.webp 1672w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-wd-divider wd-style-line wd-e68d8452\"><\/div>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-50c16a87\">How FSX Chemical Supports Purity-Sensitive Procurement<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f6a8f295\"><a href=\"https:\/\/fsxchemical.com\/ur\/contact-us\/\" data-type=\"page\" data-id=\"20\">FSX Chemical supplies sodium alginate grades for textile printing with full technical documentation including active content, NaCl content, water-insoluble matter, and moisture specifications. Batch-specific certificates of analysis are provided as standard with each order.<\/a><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0bb07247\">If your application has specific purity requirements \u2014 for buyer specifications, fine-line printing, or ionic-sensitive formulations \u2014 our technical team can discuss which grade specification is appropriate and provide comparison data to support your evaluation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-18cdb955\"><strong>Next steps:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Request a TDS<\/strong> \u2014 review active content, NaCl, insoluble matter, and moisture specifications for your target grade<\/li>\n\n\n\n<li><strong>Request Multi-Batch CoA Data<\/strong> \u2014 verify that purity specifications are consistently achieved across production batches<\/li>\n\n\n\n<li><strong>Request a Sample<\/strong> \u2014 run a purity-focused paste trial before bulk ordering<\/li>\n\n\n\n<li><a href=\"https:\/\/fsxchemical.com\/ur\/contact-us\/\" data-type=\"page\" data-id=\"20\"><strong>Contact Our Technical Team<\/strong> \u2014 for guidance on purity grade selection for your specific application and buyer requirem<\/a>ents\ud83d\udce7 <strong>Email<a href=\"https:\/\/fsxchemical.com\/ur\/contact-us\/\">: Service@fsxchemical.com<\/a><\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Sodium alginate purity specifications cover more than a single number. This guide explains what active content, NaCl, insoluble matter, and heavy metal data mean for textile printing paste performance \u2014 and when higher purity is worth specifying over a standard industrial grade.<\/p>","protected":false},"author":2,"featured_media":7938,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_titles_title":"Sodium Alginate Purity in Textile Printing: The Meaning and Importance of Specifications | FSX Chemical","_seopress_titles_desc":"What do sodium alginate purity specifications mean for textile printing? This guide covers active ingredient content, sodium chloride content, insoluble matter and heavy metal content, and when higher purity is needed to justify the price.","_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":[1141,1119,395,1145,1126,87,1114],"class_list":["post-4365","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-guides","tag-cmc-purity","tag-grade-selection","tag-printing-paste","tag-reactive-dye-printing","tag-screen-printing","tag-sodium-alginate","tag-textile-printing"],"acf":[],"_links":{"self":[{"href":"https:\/\/fsxchemical.com\/ur\/wp-json\/wp\/v2\/posts\/4365","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fsxchemical.com\/ur\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fsxchemical.com\/ur\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fsxchemical.com\/ur\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/fsxchemical.com\/ur\/wp-json\/wp\/v2\/comments?post=4365"}],"version-history":[{"count":7,"href":"https:\/\/fsxchemical.com\/ur\/wp-json\/wp\/v2\/posts\/4365\/revisions"}],"predecessor-version":[{"id":8463,"href":"https:\/\/fsxchemical.com\/ur\/wp-json\/wp\/v2\/posts\/4365\/revisions\/8463"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/fsxchemical.com\/ur\/wp-json\/wp\/v2\/media\/7938"}],"wp:attachment":[{"href":"https:\/\/fsxchemical.com\/ur\/wp-json\/wp\/v2\/media?parent=4365"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fsxchemical.com\/ur\/wp-json\/wp\/v2\/categories?post=4365"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fsxchemical.com\/ur\/wp-json\/wp\/v2\/tags?post=4365"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}