{"id":3531,"date":"2026-07-29T09:00:00","date_gmt":"2026-07-29T09:00:00","guid":{"rendered":"https:\/\/www.hnlongtai.com\/?p=3531"},"modified":"2026-07-30T06:23:14","modified_gmt":"2026-07-30T06:23:14","slug":"how-to-reduce-flooding-and-floating-in-white-pigmented-coatings","status":"publish","type":"post","link":"https:\/\/www.hnlongtai.com\/zh\/how-to-reduce-flooding-and-floating-in-white-pigmented-coatings\/","title":{"rendered":"Flooding and Floating in White Coatings: Causes and Fixes"},"content":{"rendered":"\ufeff<p class=\"wp-block-paragraph\"><strong>How to Reduce Flooding and Floating in White Pigmented Coatings<\/strong> starts with one practical rule: evaluate the pigment inside the complete production formulation, not from TiO2 assay or a single supplier value. flooding and floating in white coatings performance depends on the pigment surface, formulation chemistry, dispersion process, film structure, and end-use requirement. A controlled trial should connect those variables to hiding, appearance, processing, durability, and cost.<\/p>\n<h2 class=\"wp-block-heading\">Table Of Contents<\/h2>\n<ul class=\"wp-block-list\"><li><a href=\"#why\">\u4e3a\u4ec0\u4e48\u914d\u65b9\u4f1a\u6539\u53d8\u7ed3\u679c<\/a><\/li><li><a href=\"#compare\">\u914d\u65b9\u5e08\u5e94\u8be5\u6bd4\u8f83\u4ec0\u4e48<\/a><\/li><li><a href=\"#trial\">\u53d7\u63a7\u7684\u5b9e\u9a8c\u5ba4\u5de5\u4f5c\u6d41\u7a0b<\/a><\/li><li><a href=\"#diagnose\">\u5982\u4f55\u8bca\u65ad\u5f31\u7ed3\u679c<\/a><\/li><li><a href=\"#buy\">\u4f9b\u5e94\u5546\u8d44\u683c\u6e05\u5355<\/a><\/li><li><a href=\"#faq\">\u5e38\u89c1\u95ee\u9898<\/a><\/li><\/ul>\n<h2 class=\"wp-block-heading\" id=\"why\">Why Flooding And Floating Control Changes Pigment Performance<\/h2>\n<p class=\"wp-block-paragraph\">Flooding is a relatively uniform color change across a film, while floating creates visible separation patterns at the surface. Differences in pigment mobility, density, surface energy, flocculation state, solvent flow, and drying rate drive both defects.<\/p>\n<p class=\"wp-block-paragraph\">For this reason, flooding and floating in white coatings should be treated as a formulation-and-process decision. A white base can appear uniform alone but develop streaks or shade variation after tinting. Reformulating colorant without checking TiO2 dispersion and rheology may move the defect instead of removing its cause. The useful question is not whether one certificate number is higher, but whether the candidate creates a stable, reproducible coating within the plant&#8217;s operating limits.<\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/www.hnlongtai.com\/wp-content\/uploads\/2026\/07\/titanium-dioxide-particle-size-distribution-coatings.png\" alt=\"flooding and floating in white coatings laboratory comparison with pigment distribution curves and coating drawdowns\" class=\"wp-image-3626\" srcset=\"https:\/\/www.hnlongtai.com\/wp-content\/uploads\/2026\/07\/titanium-dioxide-particle-size-distribution-coatings.png 1536w, https:\/\/www.hnlongtai.com\/wp-content\/uploads\/2026\/07\/titanium-dioxide-particle-size-distribution-coatings-300x200.png 300w, https:\/\/www.hnlongtai.com\/wp-content\/uploads\/2026\/07\/titanium-dioxide-particle-size-distribution-coatings-1024x683.png 1024w, https:\/\/www.hnlongtai.com\/wp-content\/uploads\/2026\/07\/titanium-dioxide-particle-size-distribution-coatings-768x512.png 768w, https:\/\/www.hnlongtai.com\/wp-content\/uploads\/2026\/07\/titanium-dioxide-particle-size-distribution-coatings-18x12.png 18w, https:\/\/www.hnlongtai.com\/wp-content\/uploads\/2026\/07\/titanium-dioxide-particle-size-distribution-coatings-600x400.png 600w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<h2 class=\"wp-block-heading\" id=\"compare\">What To Compare Before Approving Flooding And Floating In White Coatings<\/h2>\n<p class=\"wp-block-paragraph\">Use drawdowns with and without rub-up, vertical and horizontal panels, controlled film thickness, viscosity profiles, color difference, and drying observations. Hold tint paste, mixing time, substrate, airflow, and application method constant. This prevents a stronger result from being created by a hidden change in the test rather than by the pigment.<\/p>\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u51b3\u7b56\u533a\u57df<\/th><th>\u6d4b\u91cf<\/th><th>\u4e3a\u4ec0\u4e48\u8fd9\u5f88\u91cd\u8981<\/th><\/tr><\/thead><tbody><tr><td>Pigment mobility and flocculation state<\/td><td>Rub-up, Delta E, surface pattern, sag<\/td><td>Separates color development from migration<\/td><\/tr><tr><td>\u5206\u6563\u8d28\u91cf<\/td><td>\u7ec6\u5ea6\u3001\u6b8b\u7559\u7269\u3001\u80fd\u91cf\u3001\u6e29\u5ea6<\/td><td>\u5c06\u5de5\u827a\u9650\u5236\u4e0e\u989c\u6599\u884c\u4e3a\u5206\u5f00<\/td><\/tr><tr><td>\u5e72\u819c\u6548\u7387<\/td><td>\u5bf9\u6bd4\u5ea6\u3001\u8272\u8c03\u5f3a\u5ea6\u3001\u5149\u6cfd\u5ea6<\/td><td>\u5728\u53d7\u63a7\u80f6\u7247\u6784\u5efa\u4e0b\u663e\u793a\u51fa\u6709\u7528\u7684\u5149\u5b66\u6027\u80fd<\/td><\/tr><tr><td>\u7a33\u5065\u6027<\/td><td>\u50a8\u5b58\u8001\u5316\u548c\u91cd\u590d\u6279\u6b21<\/td><td>\u68c0\u67e5\u7ed3\u679c\u662f\u5426\u7a33\u5b9a\u4e14\u53ef\u91cd\u590d<\/td><\/tr><\/tbody><\/table><\/figure>\n<p class=\"wp-block-paragraph\">Use supplier data to define the starting window, then verify flooding and floating in white coatings with your own raw materials. Laser-diffraction results should be interpreted under a declared method because ISO 13320 describes method-dependent equivalent-sphere distributions. A grind gauge, covered by ASTM D1210, measures coarse particles or agglomerates in a dispersion; it does not replace an optical-performance test.<\/p>\n<h2 class=\"wp-block-heading\" id=\"trial\">A Controlled Flooding And Floating In White Coatings Laboratory Workflow<\/h2>\n<p class=\"wp-block-paragraph\">Prepare a small matrix that varies dispersant and rheology strategy one factor at a time. Evaluate immediately and through drying because surface separation may appear only while solvent or water is leaving the film. Randomize sample order where practical and repeat the control so drift in mixing, application, or measurement becomes visible.<\/p>\n<ol class=\"wp-block-list\"><li>\u5728\u6253\u5f00\u6837\u672c\u4e4b\u524d\u5b9a\u4e49\u901a\u8fc7\/\u5931\u8d25\u9650\u5236\u3002.<\/li><li>\u5728\u76f8\u540c\u6e29\u5ea6\u4e0b\u8c03\u8282\u539f\u6750\u6599\u548c\u9762\u677f\u3002.<\/li><li>\u8bb0\u5f55\u5145\u7535\u987a\u5e8f\u3001\u901f\u5ea6\u3001\u65f6\u95f4\u3001\u6279\u91cf\u6e29\u5ea6\u548c\u80fd\u91cf\u3002.<\/li><li>\u5728\u5b8c\u6210\u653e\u4e0b\u4e4b\u524d\u6d4b\u8bd5\u78e8\u673a\u5e95\u5ea7\u3002.<\/li><li>\u6d82\u62b9\u7b49\u91cf\u7684\u6e7f\u819c\u6216\u5e72\u819c\u539a\u5ea6\u5e76\u4f7f\u7528\u76f8\u540c\u7684\u56fa\u5316\u65f6\u95f4\u8868\u3002.<\/li><li>\u91cd\u590d\u5173\u952e\u6d4b\u91cf\u5e76\u4fdd\u7559\u6807\u8bb0\u7684\u6837\u54c1\u3002.<\/li><\/ol>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/www.hnlongtai.com\/wp-content\/uploads\/2026\/07\/titanium-dioxide-particle-size-coatings-test-workflow.png\" alt=\"flooding and floating in white coatings coatings laboratory workflow from particle analysis and dispersion to drawdown and gloss testing\" class=\"wp-image-3627\" srcset=\"https:\/\/www.hnlongtai.com\/wp-content\/uploads\/2026\/07\/titanium-dioxide-particle-size-coatings-test-workflow.png 1536w, https:\/\/www.hnlongtai.com\/wp-content\/uploads\/2026\/07\/titanium-dioxide-particle-size-coatings-test-workflow-300x200.png 300w, https:\/\/www.hnlongtai.com\/wp-content\/uploads\/2026\/07\/titanium-dioxide-particle-size-coatings-test-workflow-1024x683.png 1024w, https:\/\/www.hnlongtai.com\/wp-content\/uploads\/2026\/07\/titanium-dioxide-particle-size-coatings-test-workflow-768x512.png 768w, https:\/\/www.hnlongtai.com\/wp-content\/uploads\/2026\/07\/titanium-dioxide-particle-size-coatings-test-workflow-18x12.png 18w, https:\/\/www.hnlongtai.com\/wp-content\/uploads\/2026\/07\/titanium-dioxide-particle-size-coatings-test-workflow-600x400.png 600w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<h2 class=\"wp-block-heading\" id=\"diagnose\">How To Diagnose Disappointing Flooding And Floating In White Coatings Results<\/h2>\n<p class=\"wp-block-paragraph\">Strong rub-up color change indicates unequal flocculation. Cellular patterns can point to surface-tension gradients or convection, while vertical shade differences may involve sag and pigment settling. Change one variable at a time and preserve the original control. Otherwise, simultaneous changes to dispersant, shear, binder, and pigment loading make the cause impossible to identify.<\/p>\n<h3 class=\"wp-block-heading\">\u4e0e\u5149\u5b66\u62e5\u6324\u5206\u5f00\u5206\u6563<\/h3>\n<p class=\"wp-block-paragraph\">If fineness improves but hiding does not, check film thickness, pigment volume concentration, extender spacing, and refractive-index contrast. If tint strength or gloss changes after a rub-up or after letdown, investigate flocculation. This distinction keeps a flooding and floating in white coatings project from becoming an endless increase in milling time.<\/p>\n<h3 class=\"wp-block-heading\">\u8ba1\u7b97\u4ea4\u4ed8\u4ef7\u503c<\/h3>\n<p class=\"wp-block-paragraph\">Compare cost at the dosage that actually passes, including dispersion time, yield loss, solvent or water adjustment, and rework risk. The cheapest price per tonne is not necessarily the lowest cost per passing litre of paint. A stable flooding and floating in white coatings grade can create value through higher throughput and fewer corrections even when its invoice price is higher.<\/p>\n<h2 class=\"wp-block-heading\" id=\"buy\">Flooding And Floating In White Coatings Supplier Qualification Checklist<\/h2>\n<p class=\"wp-block-paragraph\">Ask TiO2 and colorant suppliers for compatibility data, recommended dispersants, density and surface-treatment information, and troubleshooting support in the complete tinted formulation. Also confirm specification limits, test methods, change-notification practice, certificate availability, traceability, packaging, lead time, and technical support.<\/p>\n<ul class=\"wp-block-list\"><li>\u5c06\u7b49\u7ea7\u4e0e\u7c98\u5408\u5242\u3001\u5de5\u827a\u3001\u5149\u6cfd\u548c\u66dd\u5149\u76f8\u5339\u914d\u3002.<\/li><li>\u8bf7\u6c42\u6d4b\u8bd5\u65b9\u6cd5,\u800c\u4e0d\u4ec5\u4ec5\u662f\u5178\u578b\u503c\u3002.<\/li><li>\u5728\u5b8c\u5168\u6279\u51c6\u4e4b\u524d\u8bd5\u7528\u591a\u4e2a\u751f\u4ea7\u6279\u6b21\u3002.<\/li><li>\u4fdd\u7559\u7ecf\u6279\u51c6\u7684\u5bf9\u7167\u548c\u4fdd\u7559\u7684\u6837\u54c1\u3002.<\/li><li>\u56f4\u7ed5\u9884\u6d4b\u5de5\u5382\u6027\u80fd\u7684\u5c5e\u6027\u8bbe\u7f6e\u4f20\u5165\u68c0\u67e5\u3002.<\/li><\/ul>\n<p class=\"wp-block-paragraph\">Longtai\u4f9b\u5e94\u91d1\u7ea2\u77f3\u4e8c\u6c27\u5316\u949b\u6d82\u6599,\u652f\u6301\u5e94\u7528\u578b\u5206\u7ea7\u7b5b\u9009 \u5ba1\u6838 the <a href=\"https:\/\/www.hnlongtai.com\/zh\/product\/titanium-dioxide\/\">\u4e8c\u6c27\u5316\u949b\u4ea7\u54c1\u8303\u56f4<\/a>, \u7136\u540e\u4f7f\u7528\u6211\u4eec\u7684\u6307\u5357 <a href=\"https:\/\/www.hnlongtai.com\/zh\/how-to-test-the-dispersibility-of-titanium-dioxide\/\">\u6d4b\u8bd5tio2\u5206\u6563\u6027<\/a> \u548c\u7406\u89e3 <a href=\"https:\/\/www.hnlongtai.com\/zh\/titanium-dioxide-quality-inspection\/\">\u4e8c\u6c27\u5316\u949b\u8d28\u91cf\u68c0\u9a8c<\/a>.<\/p>\n<h2 class=\"wp-block-heading\" id=\"faq\">\u5e38\u89c1\u95ee\u9898<\/h2>\n<h3 class=\"wp-block-heading\">TDS\u53ef\u4ee5\u9009\u62e9\u6700\u4f73\u7b49\u7ea7\u5417?<\/h3>\n<p class=\"wp-block-paragraph\">No. A TDS is useful for screening, but flooding and floating in white coatings must be verified in the target formulation because binder, additives, shear, pigment volume concentration, and film build affect the result.<\/p>\n<h3 class=\"wp-block-heading\">\u5019\u9009\u4eba\u662f\u5426\u5e94\u8be5\u4f7f\u7528\u76f8\u540c\u7684\u5206\u6563\u5242\u5242\u91cf?<\/h3>\n<p class=\"wp-block-paragraph\">1\u6b21\u56fa\u5b9a\u5242\u91cf\u6bd4\u8f83, \u66b4\u9732\u7075\u654f\u5ea6, \u7136\u540e\u5206\u522b\u4f18\u5316\u6709\u524d\u9014\u7684\u5019\u9009\u8005, \u4e0d\u540c\u7684\u8272\u7d20\u8868\u9762\u53ef\u4ee5\u6709\u4e0d\u540c\u7684\u7a33\u5b9a\u5242\u91cf\u7a97\u53e3, \u4e0d\u516c\u5e73\u7684\u5242\u91cf\u53ef\u4ee5\u62d2\u7edd\u5408\u9002\u7684\u7b49\u7ea7\u3002.<\/p>\n<h3 class=\"wp-block-heading\">\u5e94\u8be5\u6279\u51c6\u591a\u5c11\u6279?<\/h3>\n<p class=\"wp-block-paragraph\">Evaluate multiple representative lots when supply risk matters. One laboratory sample demonstrates potential; repeated lots show whether flooding and floating in white coatings remains inside the process and performance window.<\/p>\n<p class=\"wp-block-paragraph\"><strong>\u9700\u8981\u6210\u7ee9\u63a8\u8350\u5417?<\/strong> <a href=\"https:\/\/www.hnlongtai.com\/zh\/contact-us\/\">\u8054\u7cfb\u9f99\u6cf0<\/a> \u51ed\u501f\u60a8\u7684\u7c98\u5408\u5242\u3001\u914d\u65b9\u7c7b\u578b\u3001\u5e94\u7528\u65b9\u6cd5\u3001\u76ee\u6807\u7279\u6027\u548c\u5f53\u524d\u63a7\u5236\u7b49\u7ea7\u3002\u6211\u4eec\u53ef\u4ee5\u63a8\u8350\u4e00\u4e2a\u8d77\u59cb\u6837\u54c1\u548c\u4e00\u4e2a\u5b9e\u7528\u7684\u6bd4\u8f83\u8ba1\u5212\u3002.<\/p>\n<p class=\"wp-block-paragraph\"><strong>\u65b9\u6cd5\u53c2\u8003:<\/strong> <a href=\"https:\/\/www.iso.org\/standard\/69111.html\" rel=\"nofollow noopener\" target=\"_blank\">ISO 13320:2020,\u7c92\u5ea6\u5206\u6790 \u8f6c\u5411?\u6fc0\u5149\u884d\u5c04\u65b9\u6cd5<\/a>; <a href=\"https:\/\/store.astm.org\/products-services\/standards-and-publications\/standards\/paint-standards-and-related-coating-standards.html\" rel=\"nofollow noopener\" target=\"_blank\">ASTM \u6cb9\u6f06\u548c\u6d82\u6599\u6807\u51c6,\u5305\u62ec D1210<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>\ufeff How to Reduce Flooding and Floating in White Pigmented Coatings starts with one practical rule: evaluate the pigment inside the complete production formulation, not from TiO2 assay or a single supplier value. flooding and floating in white coatings performance depends on the pigment surface, formulation chemistry, dispersion process, film structure, and end-use requirement. A [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3626,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-3531","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.hnlongtai.com\/zh\/wp-json\/wp\/v2\/posts\/3531","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hnlongtai.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hnlongtai.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hnlongtai.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hnlongtai.com\/zh\/wp-json\/wp\/v2\/comments?post=3531"}],"version-history":[{"count":3,"href":"https:\/\/www.hnlongtai.com\/zh\/wp-json\/wp\/v2\/posts\/3531\/revisions"}],"predecessor-version":[{"id":3840,"href":"https:\/\/www.hnlongtai.com\/zh\/wp-json\/wp\/v2\/posts\/3531\/revisions\/3840"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hnlongtai.com\/zh\/wp-json\/wp\/v2\/media\/3626"}],"wp:attachment":[{"href":"https:\/\/www.hnlongtai.com\/zh\/wp-json\/wp\/v2\/media?parent=3531"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hnlongtai.com\/zh\/wp-json\/wp\/v2\/categories?post=3531"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hnlongtai.com\/zh\/wp-json\/wp\/v2\/tags?post=3531"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}