{"id":11589,"date":"2026-01-22T15:35:54","date_gmt":"2026-01-22T15:35:54","guid":{"rendered":"https:\/\/fsxchemical.com\/?p=11589"},"modified":"2026-09-28T09:32:26","modified_gmt":"2026-09-28T09:32:26","slug":"disperse-digital-prints-lose-sharpness-heat-fixation-migration-fabric-pretreatment","status":"publish","type":"post","link":"https:\/\/fsxchemical.com\/id\/blog\/disperse-digital-prints-lose-sharpness-heat-fixation-migration-fabric-pretreatment\/","title":{"rendered":"Why Disperse Digital Prints Lose Sharpness During Heat Fixation: Ink Migration, Fabric and Pretreatment Causes"},"content":{"rendered":"<p class=\"wp-block-wd-paragraph wd-e240f606\"><em>Direct disperse inkjet prints can look sharp immediately after printing yet become softer, wider or less defined after heat fixation. When this happens, the root cause is not automatically the printer. High-temperature fixation changes the mobility of disperse dye, residual ink vehicles, pretreatment polymers and the polyester substrate itself. If the printed image still contains mobile dye or liquid, heat can continue the redistribution that began during printing. If the pretreatment film softens or releases dye unevenly, edge definition can change during fixation. If the fabric shrinks, relaxes or changes geometry under heat and tension, measured line width and edge appearance can also change. The correct diagnosis compares image geometry before fixation, after fixation and after reduction clearing, while holding ink load, pretreatment add-on, fabric tension and thermal conditions under control.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-fd799023\">Why Do Disperse Digital Prints Lose Sharpness During Heat Fixation?<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5b7aadb6\">When a direct disperse inkjet print becomes less sharp only after heat fixation, the likely causes fall into three groups:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ink \/ dye migration:<\/strong>\u00a0the printed deposit remains sufficiently mobile that heat allows additional spreading or redistribution.<\/li>\n\n\n\n<li><strong>Pretreatment-film behavior:<\/strong>\u00a0the migration-control layer softens, redistributes or holds \/ releases disperse dye differently during heating.<\/li>\n\n\n\n<li><strong>Fabric movement:<\/strong>\u00a0polyester shrinks, relaxes or changes geometry under heat and tension, altering the apparent line width and edge shape.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5b13cc17\">The most useful diagnostic sequence is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-cefbefcb\"><strong>Measure Before Fixation \u2192 Heat Fix \u2192 Measure Again \u2192 Reduction Clear \/ Wash \u2192 Measure Again<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-fd23e9ee\">This identifies the stage where sharpness first changes.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-974dd158\">If the print is already blurry before fixation, the primary cause is more likely:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pra-perlakuan<\/li>\n\n\n\n<li>Penyebaran tinta<\/li>\n\n\n\n<li>Fabric construction<\/li>\n\n\n\n<li>Residual moisture<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e394bd79\">rather than the heat-fixation stage itself.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-86fd426a\">First Question: Was the Print Already Blurred Before Fixation?<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b2d56aa0\">This question prevents many incorrect process changes.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-16d933bf\">Compare the same diagnostic line or pattern at three checkpoints:<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-393708d8\">Checkpoint 1 \u2014 Immediately Before Heat Fixation<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-64e4cc48\">Measure printed line width and edge definition after any normal post-print stabilization \/ drying.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-5a8ada45\">Checkpoint 2 \u2014 Immediately After Heat Fixation<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9a8cc8c7\">Measure the same locations before washing.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-02ea0dc1\">Checkpoint 3 \u2014 After Reduction Clearing \/ Washing<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f7a9e5e4\">Measure the final commercial fabric.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7cdc6153\">Interpretation:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Before Fixation<\/th><th>After Fixation<\/th><th>After Clearing<\/th><th>Likely Direction<\/th><\/tr><\/thead><tbody><tr><td>Blurred<\/td><td>Blurred<\/td><td>Blurred<\/td><td>Printing \/ pretreatment problem already existed<\/td><\/tr><tr><td>Sharp<\/td><td>Less sharp<\/td><td>Less sharp<\/td><td>Heat-fixation migration \/ fabric movement<\/td><\/tr><tr><td>Sharp<\/td><td>Sharp<\/td><td>Cleaner \/ sharper<\/td><td>Surface dye removed; fixation may be acceptable<\/td><\/tr><tr><td>Sharp<\/td><td>Dark but softer<\/td><td>Large color loss<\/td><td>Surface dye \/ incomplete diffusion may be significant<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-59a628c6\">Three Main Sharpness-Loss Pathways During Heat Fixation<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-be679558\">A practical root-cause model is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9d73caf1\"><strong>Printed Ink Deposit + Pretreatment Surface + Polyester Geometry + Heat \/ Time \u2192 Final Image Geometry<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2c33b432\">These mechanisms interact.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-53a68e9c\">Misalnya:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-67f867d3\"><strong>High Ink Load + High Residual Moisture + Soft Pretreatment Film + High Thermal Severity<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4f0b8573\">can create more image movement than any factor alone.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6d8a5d90\">Therefore, do not solve a thermal sharpness problem by changing only one variable before the stage of first divergence is known.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-e0ccda64\">1. Ink \/ Dye Migration During Heating<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d0bed2a9\">Disperse ink contains dye particles \/ molecules, water and organic ink vehicles before fixation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7c07abf7\">As heating begins:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Residual liquid evaporates.<\/li>\n\n\n\n<li>Ink components change viscosity and mobility.<\/li>\n\n\n\n<li>Disperse dye gains thermal mobility.<\/li>\n\n\n\n<li>Dye begins diffusing toward and into polyester.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f40a9189\">If the printed deposit is not sufficiently stabilized before fixation, some movement can continue along:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fiber surfaces<\/li>\n\n\n\n<li>Yarn boundaries<\/li>\n\n\n\n<li>Inter-yarn capillaries<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-43b9273a\">This can widen edges or soften fine detail.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d2b4775e\">Do not confuse this with molecular dye diffusion into PET, which is required for fixation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c2e28602\">The problem is\u00a0<strong>uncontrolled lateral redistribution<\/strong>, not dye diffusion itself.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-37249833\">Residual Mobile Liquid Before Fixation<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-de1ee289\">Heat fixation is easier to control when the printed image enters the high-temperature zone in a reproducible moisture state.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-da2f103b\">If the image contains too much mobile liquid:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The liquid phase can move before evaporation is complete.<\/li>\n\n\n\n<li>Capillary pathways can continue transporting dye.<\/li>\n\n\n\n<li>High-ink-load areas can remain mobile longer than fine lines.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2c52f3c1\">Possible causes include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Insufficient post-print drying<\/li>\n\n\n\n<li>Excessive ink load<\/li>\n\n\n\n<li>High pretreatment residual moisture<\/li>\n\n\n\n<li>Local wet spots from nonuniform pretreatment<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6fad0e34\">If only high-coverage areas soften during fixation, test the mobile-liquid hypothesis before changing the pretreatment polymer.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-e977248f\">High Surface Dye Concentration<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e9546581\">Pretreatment is often designed to keep disperse ink near the printable surface before fixation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a050fcd3\">This improves image sharpness.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-41438d85\">But a very high surface concentration means the thermofixation stage must move more dye from the surface environment into polyester.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-85297551\">If the dye is trapped in a strong polymer film or the fixation window is insufficient, more color can remain as surface \/ floating dye.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-473302af\">Possible symptoms include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Very dark appearance before washing<\/li>\n\n\n\n<li>Significant K\/S loss after reduction clearing<\/li>\n\n\n\n<li>Lower rubbing fastness<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-dbd8bf86\">High surface color before clearing should therefore not be treated as proof of successful fixation.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-4a9d76ff\">Excessive Thermal Severity<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3af68b0b\">High temperature and long time increase molecular mobility.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-eac41d83\">Within the useful fixation window, this helps disperse dye enter PET.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-325f1374\">Beyond the useful window, additional thermal severity can increase the risk of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Unwanted dye redistribution<\/li>\n\n\n\n<li>Shade change for thermally sensitive dye combinations<\/li>\n\n\n\n<li>Pretreatment-film softening \/ change<\/li>\n\n\n\n<li>Fabric shrinkage or relaxation<\/li>\n\n\n\n<li>Higher energy use<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-281f69b7\">The correct target is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bb5e244f\"><strong>Enough Thermal Energy for Fixation, but Not Maximum Thermal Exposure.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-87f8cb9e\">Disperse Dye Class and Thermal Mobility<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-268915fc\">Disperse dyes differ in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Molecular size<\/li>\n\n\n\n<li>Energy class<\/li>\n\n\n\n<li>Diffusion rate<\/li>\n\n\n\n<li>Sublimation fastness<\/li>\n\n\n\n<li>Thermal stability<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9ef079a8\">A heat-fixation condition that preserves sharpness for one color may not behave identically with:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A different disperse red<\/li>\n\n\n\n<li>Blue<\/li>\n\n\n\n<li>Yellow<\/li>\n\n\n\n<li>Black mixture<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-24503e9c\">Multi-color patterns can therefore show color-specific edge changes.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f6a08927\">Validate the full CMYK \/ production ink set rather than one laboratory color only.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-ffe04166\">2. Pretreatment Film and Polymer Causes<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-539a1a21\">The pretreatment film controls ink spreading before fixation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c604188d\">During heating, the same film is exposed to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Higher temperature<\/li>\n\n\n\n<li>Residual moisture loss<\/li>\n\n\n\n<li>Dye diffusion<\/li>\n\n\n\n<li>Possible polymer softening or structural change<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-79deb9a4\">Therefore:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-25b41ea4\"><strong>Pretreatment Performance Must Survive the Fixation Stage, Not Just the Printing Stage.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-84f46a92\">A pretreatment that creates excellent initial sharpness but unstable thermal behavior can still produce poor final image definition.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-4e204dc7\">Pretreatment Film Softening or Structural Change<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1c96366c\">Different polymers respond differently to heat and moisture loss.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0e2b1e5a\">During fixation, a polymer film may:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Remain relatively rigid<\/li>\n\n\n\n<li>Soften<\/li>\n\n\n\n<li>Lose water and contract<\/li>\n\n\n\n<li>Change adhesion to the fiber<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5271c185\">For compound pretreatments containing film-forming components, thermal response can be especially important.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-93051718\">If sharpness is stable before heating but deteriorates only at higher fixation severity, compare the pretreatment film under lower and reference thermal conditions.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3a96267b\">Do not assume the dye alone is responsible.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-193084bd\">When Pretreatment Polymer Add-On Is Too Low<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-09441ac7\">Low polymer add-on generally creates the sharpness defect before fixation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4e35a061\">Typical symptoms include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wider lines<\/li>\n\n\n\n<li>Fuzzy edges<\/li>\n\n\n\n<li>More yarn-direction spreading<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c60c5647\">Heat fixation may make the defect more visually obvious, but it cannot recreate lost geometric definition.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-facd687e\">If pre-fixation sharpness already fails, increase focus on:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pretreatment add-on<\/li>\n\n\n\n<li>Reologi<\/li>\n\n\n\n<li>Wet pick-up<\/li>\n\n\n\n<li>Fabric surface condition<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1fbe86c8\">rather than fixation first.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-528a6d72\">When Pretreatment Polymer Add-On Is Too High<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5ef47248\">Excess polymer can create:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Very high surface hold<\/li>\n\n\n\n<li>Heavy film<\/li>\n\n\n\n<li>High surface dye concentration<\/li>\n\n\n\n<li>Greater after-treatment load<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8a5d52e2\">During fixation, the dye must transfer from that polymer-rich surface environment into polyester.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d2aefc31\">Published disperse-inkjet literature notes that macromolecular pretreatments can improve sharpness while also inhibiting dye penetration into the fiber if the surface barrier is too strong.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f95e0071\">Therefore, a darker and sharper pre-fixation image is not automatically the optimum final process.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-554daf67\">Surface Localization vs. Deep Pretreatment Penetration<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6e54b303\">Total polymer add-on does not describe where the polymer is located.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-dbe4feaa\">Two pretreatments can have the same dry add-on but different:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Surface concentration<\/li>\n\n\n\n<li>Yarn penetration<\/li>\n\n\n\n<li>Face-to-back distribution<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1514911d\">This can change both:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pre-fixation sharpness<\/li>\n\n\n\n<li>Thermal dye-release behavior<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5dadad39\">A highly surface-localized film may hold edges strongly but require a more carefully balanced fixation window.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-db01e3d0\">A deeply penetrated polymer layer may provide less surface sharpness but create a different dye-diffusion pathway.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-fedb7301\">Salts and Other Pretreatment Auxiliaries<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-dd6a2fba\">Some published polyester pretreatment systems use salts or ionic auxiliaries to modify:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Polymer rheology<\/li>\n\n\n\n<li>Ink-fabric interaction<\/li>\n\n\n\n<li>Droplet spreading<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3258e3ed\">These auxiliaries remain in or on the fabric during heat fixation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3442b988\">Their influence depends on:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ion type<\/li>\n\n\n\n<li>Polymer chemistry<\/li>\n\n\n\n<li>Konsentrasi<\/li>\n\n\n\n<li>Wash-off route<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5226e926\">Do not generalize one published salt system to every disperse pretreatment.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-fbd28437\">3. Fabric and Mechanical Causes<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9c1e3064\">A loss of apparent sharpness after fixation can also result from the fabric changing shape rather than the dye moving laterally.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6bd0e99e\">Polyester fabrics can:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Shrink<\/li>\n\n\n\n<li>Relax<\/li>\n\n\n\n<li>Change width<\/li>\n\n\n\n<li>Change loop \/ yarn geometry<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8ac2cf59\">during high-temperature treatment.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-af86caf5\">If line width changes together with fabric dimensions, separate geometric fabric change from true ink migration.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-d34adf17\">Thermal Shrinkage and Fabric Relaxation<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ac2851e8\">Suppose a printed line is measured before fixation and the fabric later shrinks in one direction.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5945e7e5\">The line width, spacing and edge geometry can all appear different after heating even if the dye boundary did not migrate significantly.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d8f573c6\">Therefore, record:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fabric width before fixation<\/li>\n\n\n\n<li>Fabric width after fixation<\/li>\n\n\n\n<li>Length change<\/li>\n\n\n\n<li>GSM where relevant<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-009f0582\">when analyzing line-width change.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b93f5888\">Normalize image measurements if fabric dimensional change is significant.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-4f9c395d\">Fabric Tension During Fixation<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5c607877\">Continuous thermofixation equipment can hold fabric under tension while it is heated.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9d39aec8\">Tension can change:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Width<\/li>\n\n\n\n<li>Ketebalan<\/li>\n\n\n\n<li>Yarn spacing<\/li>\n\n\n\n<li>Knit-loop geometry<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d8131520\">If tension differs from the laboratory fixation method, the production print can show different edge appearance even at similar thermal severity.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-83b40d8d\">Record tension \/ overfeed \/ width-setting conditions where the equipment allows.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-cfd84471\">Warp \/ Weft and Wale \/ Course Direction Effects<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-220e14ad\">Polyester inkjet sharpness is direction-dependent because liquid follows textile structure.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8cf32e2b\">Research on woven and warp-knitted polyester has shown that printed lines can have different width and diffusion behavior depending on direction.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-56fde268\">Therefore, measure:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Horizontal \/ vertical test lines<\/li>\n\n\n\n<li>Warp \/ weft on woven fabrics<\/li>\n\n\n\n<li>Wale \/ course on knits<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a9e83548\">before and after fixation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8d7f59c9\">A thermal change in one direction only can point toward fabric geometry or directional diffusion rather than a universal pretreatment problem.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-34b2c7bd\">Woven Polyester<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0fe64155\">Woven construction creates specific capillary pathways at yarn intersections.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a490ed43\">During fixation, dimensional stability is often better than on highly elastic knits, but:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Weave type<\/li>\n\n\n\n<li>Thread density<\/li>\n\n\n\n<li>Yarn type<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-73831acb\">still affect image sharpness.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bfda1715\">Keep fabric construction constant during fixation studies.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-e299b413\">Knitted Polyester<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b88a48fb\">Knitted fabrics can change more strongly under thermal and mechanical conditions.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-02b5cc38\">Possible effects include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Loop relaxation<\/li>\n\n\n\n<li>Width change<\/li>\n\n\n\n<li>Stretch recovery<\/li>\n\n\n\n<li>Local geometry change<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4e302432\">A printed edge can therefore look softer after fixation partly because the substrate geometry changed.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-abaf81f4\">Record wale \/ course line widths and dimensional change separately.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-61ecf27f\">Microfiber \/ Fine-Filament Polyester<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8500504e\">Microfiber polyester has high surface area and fine capillary structure.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f326326c\">It can show different:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pretreatment retention<\/li>\n\n\n\n<li>Penyebaran tinta<\/li>\n\n\n\n<li>Dye diffusion<\/li>\n\n\n\n<li>Heat response<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-fdef02bf\">from conventional filament polyester.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9b9d97b5\">Do not use one thermal-sharpness window for all PET constructions.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-a6d7e1db\">Residual Moisture Before Heat Fixation<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-77657cc7\">Incoming moisture changes the first part of the heating cycle.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1ce8571c\">If moisture is high:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>More heat is initially consumed by evaporation.<\/li>\n\n\n\n<li>Fabric temperature can rise more slowly.<\/li>\n\n\n\n<li>The printed deposit can remain mobile for longer.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ba8cbee6\">If moisture varies across width, thermal sharpness can also vary across width.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0c5bda4d\">Control the moisture state before comparing temperature\/time conditions.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-1abe35e7\">Post-Print Drying Before Fixation<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5fc55150\">Where the process includes post-print drying or stabilization, its function is to immobilize the wet printed image sufficiently for handling and later fixation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f0fcc416\">If it is insufficient:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wet ink can continue to spread.<\/li>\n\n\n\n<li>Contact transfer can occur.<\/li>\n\n\n\n<li>Heat-fixation blur can actually begin before the high-temperature zone.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-06a0f405\">If it is too aggressive:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The printed surface can become highly concentrated with dye and auxiliaries.<\/li>\n\n\n\n<li>The subsequent fixation response can change.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0e6afb3c\">Record this stage separately from thermofixation.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-75c626f7\">Temperature and Time Interaction<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7e1c40ee\">Temperature increases disperse-dye mobility and PET segmental mobility.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d208cd0e\">Time controls how long these processes continue.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0b6a496b\">Higher temperature can often allow shorter time, but:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6ad79f54\"><strong>Temperature and Time Are Not Perfect Substitutes.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-84ab1a04\">Different combinations can create different:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dye diffusion<\/li>\n\n\n\n<li>Thermal migration<\/li>\n\n\n\n<li>Pretreatment-film response<\/li>\n\n\n\n<li>Fabric shrinkage<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f3d0fe67\">Build a controlled temperature \u00d7 time matrix instead of changing only temperature.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-e54b2bc1\">Machine Setpoint vs. Actual Fabric Temperature<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-cd25a421\">The air or machine setpoint is not automatically the fabric temperature.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-afbc518d\">Actual fabric heating depends on:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fabric GSM<\/li>\n\n\n\n<li>Incoming moisture<\/li>\n\n\n\n<li>Airflow<\/li>\n\n\n\n<li>Line speed<\/li>\n\n\n\n<li>Equipment loading<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3416cadd\">Two fabrics can pass through the same machine setting but reach different thermal histories.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-86b7d64e\">For precise troubleshooting, use direct or validated indirect fabric-temperature measurement where practical.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-60aca8ae\">Airflow and Widthwise Thermal Uniformity<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-717bad77\">If image sharpness changes only in one width zone after fixation, check thermal uniformity.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9ddb0e79\">Possible causes include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Uneven airflow<\/li>\n\n\n\n<li>Blocked nozzles<\/li>\n\n\n\n<li>Top \/ bottom imbalance<\/li>\n\n\n\n<li>Uneven fabric tension<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-75e5b234\">Bandingkan:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8cce74ce\"><strong>Left \u2192 Center \u2192 Right<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c3d23061\">for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pre-fixation line width<\/li>\n\n\n\n<li>Post-fixation line width<\/li>\n\n\n\n<li>Post-clearing K\/S<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9f478987\">A width-specific change is unlikely to be caused by one globally uniform ink formulation alone.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-ee4b2b30\">How to Measure Sharpness Loss Quantitatively<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0bcf99f4\">Use a fixed diagnostic image with known digital geometry.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bfe6ab23\">Useful metrics include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Printed line width<\/li>\n\n\n\n<li>Line-width change percentage<\/li>\n\n\n\n<li>Edge roughness<\/li>\n\n\n\n<li>Long \/ short axis of printed droplets<\/li>\n\n\n\n<li>Droplet spread area<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5718297a\">A useful line-width change calculation is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9eee14e3\"><strong>Sharpness Change (%) = (Post-Fixation Line Width \u2212 Pre-Fixation Line Width) \u00f7 Pre-Fixation Line Width \u00d7 100<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-42367c1e\">Positive values indicate line broadening after fixation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-009e6fb7\">Also record fabric dimensional change so geometric shrinkage is not mistaken for dye migration.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-3d41cf31\">Build a Before \/ After Fixation Sharpness Map<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Measurement<\/th><th>Before Fixation<\/th><th>After Fixation<\/th><th>After Clearing<\/th><\/tr><\/thead><tbody><tr><td>Horizontal line width<\/td><td>Measure<\/td><td>Measure<\/td><td>Measure<\/td><\/tr><tr><td>Vertical line width<\/td><td>Measure<\/td><td>Measure<\/td><td>Measure<\/td><\/tr><tr><td>Edge roughness<\/td><td>Measure \/ score<\/td><td>Measure \/ score<\/td><td>Measure \/ score<\/td><\/tr><tr><td>K\/S<\/td><td>Optional reference<\/td><td>Measure<\/td><td>Final value<\/td><\/tr><tr><td>Fabric width \/ length<\/td><td>Measure<\/td><td>Measure<\/td><td>Measure if relevant<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8a76f960\">This map identifies whether image geometry changes during thermal fixation or mainly during after-treatment.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-c97995a2\">Why Sharpness Should Also Be Checked After Reduction Clearing<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b56d196c\">Reduction clearing or the validated wash-off process removes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Unfixed \/ surface disperse dye<\/li>\n\n\n\n<li>Residual pretreatment polymer<\/li>\n\n\n\n<li>Other surface residues<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-30fb6b54\">After clearing, edges can sometimes appear cleaner because loose surface color has been removed.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-913f07aa\">Conversely, a print that looked dark before washing may lose color and reveal that fixation was incomplete.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bdc9c934\">Final sharpness should therefore be judged on the finished fabric.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-933cc0de\">Sharpness vs. Color Yield<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b30b7712\">Sharpness and K\/S are separate performance dimensions.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-50d89b80\">A pretreatment can produce:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Very narrow lines<\/li>\n\n\n\n<li>Strong surface color<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-aee7b2bf\">before fixation, yet still lose significant K\/S after clearing if dye transfer into PET is insufficient.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ebdd5078\">Another system can produce slightly more penetration but better fixation and higher final color.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a72d7e5f\">Evaluasi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Line width<\/li>\n\n\n\n<li>Post-clearing K\/S<\/li>\n\n\n\n<li>Ketahanan<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-fc39e724\">separately before selecting the final condition.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-e2b7da2d\">Sharpness vs. Dye Penetration<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bc000cd9\">Two types of \u201cpenetration\u201d should be separated:<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-cd88511c\">Liquid Ink Penetration<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-326d1bd3\">Occurs mainly before fixation through yarn and fabric capillaries.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-cf7282ab\">Molecular Dye Diffusion into PET<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6a787fa9\">Occurs during heat fixation and is required for proper disperse-dye fixation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3081611b\">A strong pretreatment should reduce uncontrolled liquid penetration while still allowing adequate molecular dye diffusion during fixation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-72f8c634\">Confusing these mechanisms can lead to excessive polymer dosage or excessive heat.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-cbcc8d39\">Sharpness vs. Fixation Quality<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c07917c9\">A sharp print is not necessarily well fixed.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1747f148\">A well-fixed print is not necessarily geometrically sharp.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e3cf6571\">Final approval should include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ketajaman<\/li>\n\n\n\n<li>K\/S<\/li>\n\n\n\n<li>Rubbing \/ washing fastness<\/li>\n\n\n\n<li>White-ground cleanliness where relevant<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0b7833ba\">This is especially important for high-surface-hold pretreatments.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-24405ebb\">Same Ink, Different Fabric: Why Fixation Sharpness Can Change<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b61fabb0\">The same disperse ink can behave differently on:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Woven polyester<\/li>\n\n\n\n<li>Warp knit<\/li>\n\n\n\n<li>Stretch knit<\/li>\n\n\n\n<li>Microfiber<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-dd72ee17\">because the fabric changes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Capillary pathways<\/li>\n\n\n\n<li>Heat transfer<\/li>\n\n\n\n<li>Tension response<\/li>\n\n\n\n<li>Dimensional stability<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a122bde9\">Therefore, a heat-fixation sharpness specification should be fabric-specific.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-1cecfa4b\">Same Pretreatment, Different Heat-Fixation Result<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0171214f\">Even with identical pretreatment concentration, differences in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wet pick-up<\/li>\n\n\n\n<li>Polymer surface distribution<\/li>\n\n\n\n<li>Pengeringan<\/li>\n\n\n\n<li>Residual moisture<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1a5c235e\">can change the surface entering fixation.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-fd5ceb80\">This is why one pretreatment batch can perform differently on two production lots without the chemical itself being inconsistent.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c36243d4\">Record the full process, not product dosage alone.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-21534b05\">What Pretreatment-Free Disperse Ink Research Tells Us<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a79c5308\">Recent research has created direct disperse inks whose viscosity or thixotropic structure increases after deposition on polyester.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3e73e249\">The purpose is to suppress ink bleeding without conventional fabric pretreatment.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-94fe53ab\">This work confirms an important mechanism:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0938ec51\"><strong>Controlling Local Ink Mobility Before Fixation Preserves Image Geometry.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8899e6a2\">But these are purpose-designed ink systems.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9ad7de3a\">They do not mean that conventional disperse ink should be modified casually or that every production fabric can eliminate pretreatment.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-36f0cca2\">Recommended Root-Cause Diagnostic Sequence<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Measure line width \/ sharpness before fixation.<\/strong><\/li>\n\n\n\n<li><strong>Record fabric dimensions before fixation.<\/strong><\/li>\n\n\n\n<li><strong>Freeze ink load, pretreatment and post-print drying.<\/strong><\/li>\n\n\n\n<li><strong>Run the current thermofixation condition.<\/strong><\/li>\n\n\n\n<li><strong>Measure sharpness and dimensions again.<\/strong><\/li>\n\n\n\n<li><strong>Reduction clear \/ wash using one fixed method.<\/strong><\/li>\n\n\n\n<li><strong>Measure final K\/S, sharpness and fastness.<\/strong><\/li>\n\n\n\n<li><strong>If sharpness changes only during heating, build a temperature \u00d7 time matrix.<\/strong><\/li>\n\n\n\n<li><strong>If high surface dye remains, test pretreatment add-on \/ film effects.<\/strong><\/li>\n\n\n\n<li><strong>If line geometry changes with fabric dimensions, investigate tension \/ shrinkage.<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-682f5be7\">This sequence separates three different problems that can otherwise look identical in the finished fabric.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-7c560af7\">Build a Temperature \u00d7 Time Sharpness Matrix<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-aeda4176\">Start from the validated ink \/ equipment baseline rather than from a generic temperature.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Condition<\/th><th>Suhu<\/th><th>Time<\/th><th>Pre-Fix Sharpness<\/th><th>Post-Fix Sharpness<\/th><th>Post-Clearing K\/S<\/th><\/tr><\/thead><tbody><tr><td>A<\/td><td>Lower controlled<\/td><td>Longer<\/td><td>Reference<\/td><td>Measure<\/td><td>Measure<\/td><\/tr><tr><td>B<\/td><td>Reference<\/td><td>Reference<\/td><td>Reference<\/td><td>Kontrol<\/td><td>Kontrol<\/td><\/tr><tr><td>C<\/td><td>Higher controlled<\/td><td>Shorter<\/td><td>Reference<\/td><td>Measure<\/td><td>Measure<\/td><\/tr><tr><td>D<\/td><td>Reference<\/td><td>Shorter<\/td><td>Reference<\/td><td>Measure<\/td><td>Measure<\/td><\/tr><tr><td>E<\/td><td>Higher controlled<\/td><td>Reference<\/td><td>Reference<\/td><td>Thermal stress check<\/td><td>Measure<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-214f8d97\">The exact temperature and time range should come from the disperse ink supplier, dye class, polyester construction and equipment.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-844ebe9c\">Build a Pretreatment \u00d7 Heat-Fixation Matrix<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Pretreatment Condition<\/th><th>Lower Thermal Severity<\/th><th>Reference Thermal Severity<\/th><th>Higher Thermal Severity<\/th><\/tr><\/thead><tbody><tr><td>Lower polymer add-on<\/td><td>Uji Coba<\/td><td>Uji Coba<\/td><td>Diagnostic<\/td><\/tr><tr><td>Reference add-on<\/td><td>Uji Coba<\/td><td>Kontrol<\/td><td>Uji Coba<\/td><\/tr><tr><td>Higher polymer add-on<\/td><td>Diagnostic<\/td><td>Uji Coba<\/td><td>Uji Coba<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-48cf42fd\">For each condition, compare:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pre-fix line width<\/li>\n\n\n\n<li>Post-fix line width<\/li>\n\n\n\n<li>Post-clearing K\/S<\/li>\n\n\n\n<li>Ketahanan<\/li>\n\n\n\n<li>Hand<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-dac8bf97\">This identifies whether increasing thermal severity is compensating for an overly heavy surface film rather than solving the root cause efficiently.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-69028fa1\">Build a Fabric-Tension \/ Thermal Matrix<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9fd00959\">If the problem appears mainly on knits or stretch fabrics, hold chemistry constant and compare:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reference tension \/ width setting<\/li>\n\n\n\n<li>Lower controlled tension<\/li>\n\n\n\n<li>Alternative overfeed \/ relaxation setting where equipment permits<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-97e7f8d3\">at one fixed thermal condition.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d6c76fc6\">Measure:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fabric width \/ length<\/li>\n\n\n\n<li>Horizontal line width<\/li>\n\n\n\n<li>Vertical line width<\/li>\n\n\n\n<li>K\/S<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3fc5fd80\">This separates fabric-geometry effects from dye migration.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-396f17f0\">Recommended Laboratory Workflow<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Use one representative polyester fabric lot.<\/strong><\/li>\n\n\n\n<li><strong>Freeze the disperse ink, printhead, print mode and ink load.<\/strong><\/li>\n\n\n\n<li><strong>Apply one controlled pretreatment condition.<\/strong><\/li>\n\n\n\n<li><strong>Control pretreatment drying and residual moisture.<\/strong><\/li>\n\n\n\n<li><strong>Print a diagnostic image containing fine lines, small text and high-coverage blocks.<\/strong><\/li>\n\n\n\n<li><strong>Stabilize \/ dry the printed image using one defined method if required.<\/strong><\/li>\n\n\n\n<li><strong>Measure pre-fixation line width and fabric dimensions.<\/strong><\/li>\n\n\n\n<li><strong>Run controlled heat-fixation conditions.<\/strong><\/li>\n\n\n\n<li><strong>Measure post-fixation line width and dimensions.<\/strong><\/li>\n\n\n\n<li><strong>Reduction clear \/ wash identically.<\/strong><\/li>\n\n\n\n<li><strong>Measure final line width, K\/S and fastness.<\/strong><\/li>\n\n\n\n<li><strong>Select a stable thermal window rather than one maximum-temperature condition.<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3ea7155d\">For controlled pretreatment comparison, use\u00a0<a href=\"https:\/\/fsxchemical.com\/id\/layanan\/sampel-yang-cocok\/\">Sampel &amp; Pencocokan Grade<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-fece6faf\">Production Trial Approval<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-65ec88a6\">Catatan:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Polyester fiber \/ construction \/ GSM \/ width<\/li>\n\n\n\n<li>Disperse ink supplier \/ grade<\/li>\n\n\n\n<li>Pretreatment product \/ batch<\/li>\n\n\n\n<li>Pretreatment concentration \/ dry add-on<\/li>\n\n\n\n<li>Pretreatment drying conditions<\/li>\n\n\n\n<li>Residual moisture<\/li>\n\n\n\n<li>Print mode \/ ink load<\/li>\n\n\n\n<li>Post-print drying \/ stabilization<\/li>\n\n\n\n<li>Pre-fixation line width<\/li>\n\n\n\n<li>Thermofixation equipment<\/li>\n\n\n\n<li>Temperature zones<\/li>\n\n\n\n<li>Line speed \/ residence time<\/li>\n\n\n\n<li>Fabric tension \/ width \/ overfeed where relevant<\/li>\n\n\n\n<li>Post-fixation line width<\/li>\n\n\n\n<li>Reduction clearing \/ washing<\/li>\n\n\n\n<li>Post-clearing K\/S \/ sharpness \/ fastness<\/li>\n\n\n\n<li>Fabric dimensional change<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e5b7d827\">Approve the complete pretreatment\u2013printing\u2013fixation process rather than only a chamber temperature.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-d32c6b7b\">Common Heat-Fixation Sharpness Mistakes<\/h2>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-7b10ed8c\">1. Blaming Heat Fixation for a Print That Was Already Blurred<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c903f1d9\">Measure pre-fixation geometry first.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-1ec262e5\">2. Increasing Fixation Temperature to Correct Low Pre-Fixation Sharpness<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e59bbaf7\">Thermofixation cannot restore edge definition that was already lost during printing.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-4c0c7efa\">3. Assuming Line-Width Change Is Always Dye Migration<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2827dd10\">Fabric shrinkage or tension can also change apparent geometry.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-826629d7\">4. Using Pre-Wash K\/S as Proof of Good Fixation<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-787da974\">Surface dye can create dark appearance before clearing.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-313446f9\">5. Increasing Pretreatment Polymer Without Checking Final Fixation<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-440ec4da\">More surface hold can increase floating dye or hinder dye transfer into PET.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-3da76ac8\">6. Treating Temperature and Time as Perfectly Interchangeable<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-246cf4c4\">Different combinations can create different pretreatment-film and fabric responses.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-d494e932\">7. Ignoring Residual Moisture Before Fixation<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-33c3fa05\">Different incoming moisture changes early heating and image mobility.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-ae5ef86c\">8. Measuring Only One Direction<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-532fb0a8\">Polyester fabric structure can produce different warp\/weft or wale\/course sharpness behavior.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-d3f1c86b\">Troubleshooting Table<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Masalah yang Diamati<\/th><th>First Variables to Check<\/th><th>Jangan Berasumsi<\/th><\/tr><\/thead><tbody><tr><td>Lines already wide before fixation<\/td><td>Pretreatment, ink load, residual moisture, fabric structure<\/td><td>Heat fixation is the primary cause<\/td><\/tr><tr><td>Lines sharp before fixation but wider after heat<\/td><td>Thermal severity, residual liquid, pretreatment-film behavior, fabric dimensions<\/td><td>The printer caused the blur<\/td><\/tr><tr><td>Only knit fabric loses sharpness after heat<\/td><td>Tension, shrinkage, loop geometry, thermal setting<\/td><td>The pretreatment is globally unsuitable<\/td><\/tr><tr><td>High pre-wash color, large loss after clearing<\/td><td>Surface dye, polymer add-on, fixation depth<\/td><td>Dark pre-wash color means good fixation<\/td><\/tr><tr><td>Sharpness worsens only at highest temperature<\/td><td>Thermal migration, polymer softening, fabric relaxation<\/td><td>Continue increasing temperature<\/td><\/tr><tr><td>Left side loses sharpness after fixation<\/td><td>Airflow, fabric temperature, tension \/ width profile<\/td><td>Ink formulation is the only cause<\/td><\/tr><tr><td>One color bleeds more after fixation<\/td><td>Dye class, ink formulation, sublimation \/ diffusion response<\/td><td>One thermal window fits every color equally<\/td><\/tr><tr><td>Sharpness good but rubbing fastness poor<\/td><td>Surface dye, fixation depth, reduction clearing<\/td><td>Sharpness proves fixation quality<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-667c7d48\">Total Biaya Penggunaan<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1356a662\">Loss of sharpness during fixation can increase:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pencetakan ulang<\/li>\n\n\n\n<li>Ink correction<\/li>\n\n\n\n<li>Reduction-clearing demand<\/li>\n\n\n\n<li>Thermal energy<\/li>\n\n\n\n<li>Production downtime<\/li>\n\n\n\n<li>Quality rejects<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ace44091\">A useful model is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-84211cd4\"><strong>Total Cost in Use = Pretreatment + Printing + Post-Print Drying + Heat Fixation + Reduction Clearing + Rework + Quality Loss<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bacfb08a\">Higher fixation temperature is not free.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-44637bcf\">Higher polymer add-on is not free.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-045d60dc\">The economically correct process is the lowest stable combination that delivers:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ketajaman<\/li>\n\n\n\n<li>Post-clearing color<\/li>\n\n\n\n<li>Ketahanan<\/li>\n\n\n\n<li>Fabric dimensional quality<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-a645ba54\">What Information Should You Send to a Supplier?<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7263522b\">For useful heat-fixation sharpness troubleshooting, provide:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Polyester fabric construction \/ GSM \/ width<\/li>\n\n\n\n<li>Disperse ink supplier \/ grade<\/li>\n\n\n\n<li>Current pretreatment product \/ TDS<\/li>\n\n\n\n<li>Pretreatment concentration \/ dry add-on<\/li>\n\n\n\n<li>Pretreatment application route<\/li>\n\n\n\n<li>Pretreatment drying conditions<\/li>\n\n\n\n<li>Residual moisture if available<\/li>\n\n\n\n<li>Print mode \/ approximate ink load<\/li>\n\n\n\n<li>Post-print drying if used<\/li>\n\n\n\n<li>Pre-fixation line width \/ photo<\/li>\n\n\n\n<li>Heat-fixation temperature \/ time \/ line speed<\/li>\n\n\n\n<li>Fabric tension \/ width setting where relevant<\/li>\n\n\n\n<li>Post-fixation line width \/ photo<\/li>\n\n\n\n<li>Reduction clearing \/ washing route<\/li>\n\n\n\n<li>Post-clearing K\/S \/ sharpness \/ fastness<\/li>\n\n\n\n<li>Main issue: edge broadening, thermal blur, color loss, floating dye or width variation<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bb0f7a7b\">FSX Chemical can use this information through\u00a0<a href=\"https:\/\/fsxchemical.com\/id\/layanan\/sampel-yang-cocok\/\">Sampel &amp; Pencocokan Grade<\/a>\u00a0to separate ink migration, fabric movement and pretreatment causes.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bb66a38c\">Ulasan\u00a0<a href=\"https:\/\/fsxchemical.com\/id\/product\/pasta-cetak-digital\/\">Digital Textile Printing Pretreatment<\/a>,\u00a0<a href=\"https:\/\/fsxchemical.com\/id\/blog\/textile-printing-thickener-testing-parameters\/\">Textile Printing Thickener Testing Parameters<\/a>\u00a0dan\u00a0<a href=\"https:\/\/fsxchemical.com\/id\/aplikasi\/\">Aplikasi Pencetakan Tekstil<\/a>\u00a0for related process control.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-5f4768b3\">How Should a Mill Diagnose Sharpness Loss During Heat Fixation?<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-02ff2e7b\">A practical workflow is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-faba7f8b\"><strong>Measure Before Fixation \u2192 Record Fabric Dimensions \u2192 Heat Fix \u2192 Measure Again \u2192 Reduction Clear \u2192 Measure Final Sharpness \/ K\/S \/ Fastness \u2192 Separate Ink Migration from Pretreatment and Fabric Effects<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bf618683\">The key principles are:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>If the print is already blurred before fixation, fix the printing \/ pretreatment stage first.<\/strong><\/li>\n\n\n\n<li><strong>If sharpness changes only during heating, investigate thermal severity, residual liquid, pretreatment-film behavior and fabric dimensional change.<\/strong><\/li>\n\n\n\n<li><strong>Do not treat required molecular dye diffusion into PET as the same phenomenon as unwanted lateral image migration.<\/strong><\/li>\n\n\n\n<li><strong>High pretreatment polymer add-on can improve pre-fixation sharpness but can also increase surface dye and change the fixation requirement.<\/strong><\/li>\n\n\n\n<li><strong>Measure line width and fabric dimensions before and after heat so shrinkage is not misdiagnosed as dye migration.<\/strong><\/li>\n\n\n\n<li><strong>The best process preserves image geometry while still achieving adequate dye diffusion, post-clearing color and fastness at the lowest practical Total Cost in Use.<\/strong><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-243a396c\">Pertanyaan yang Sering Diajukan<\/h2>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-22f7cd1f\">1. Why does a disperse digital print look sharp before heat fixation but blurry afterward?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-dd3db2f8\">Possible causes include residual mobile ink, excessive thermal severity, pretreatment-film softening or redistribution, thermal dye migration, and polyester shrinkage or relaxation.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-d2040fd1\">2. Can thermofixation fix a print that was already blurred before heating?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ed607e4f\">No. Heat fixation can improve dye diffusion and fixation, but it cannot restore lost geometric edge definition.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-68de0829\">3. Does higher fixation temperature always reduce sharpness?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0065c9a7\">No. The correct temperature is required for disperse-dye diffusion. Sharpness loss becomes a concern when thermal severity, residual liquid, pretreatment or fabric behavior creates unwanted lateral movement or dimensional change.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-d4c72f44\">4. How can I tell whether line broadening comes from dye migration or fabric shrinkage?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-15ff4622\">Measure the fabric dimensions and printed line widths before and after fixation. If both fabric geometry and line geometry change, normalize the image measurements and investigate tension \/ shrinkage.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-f0543b98\">5. Can too much pretreatment thickener cause sharpness loss during fixation?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1bd01f9a\">It can contribute in some systems by creating a heavy surface film, retaining more dye outside PET or changing its thermal release. Verify polymer add-on and post-clearing color.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-970dff6b\">6. Why is residual moisture important before heat fixation?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3776dd43\">High moisture slows initial fabric heating and can keep the printed deposit mobile for longer, increasing the possibility of redistribution before fixation stabilizes the image.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-5fb8a5a3\">7. Why does only one disperse ink color soften during fixation?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-cc553568\">Different disperse dyes can have different molecular size, diffusion and thermal \/ sublimation behavior. Evaluate the individual ink or dye class.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-f76fe3a5\">8. Should sharpness be measured before or after reduction clearing?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c4d6dca0\">Both are useful. Pre-fixation and post-fixation measurements locate the stage of change; post-clearing measurement represents the finished commercial fabric.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-9cafd1e3\">9. Why can knitted polyester lose more apparent sharpness after heating?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6992da1b\">Knits can relax or change loop geometry, width and tension under heat, so apparent image dimensions can change even without severe lateral dye migration.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-4f4694c3\">10. Can pretreatment-free disperse inks avoid heat-fixation blur?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f39a1218\">Purpose-designed thermosensitive or thixotropic inks can suppress spreading before fixation, but they still require a validated fixation process. They are not equivalent to conventional disperse inks without pretreatment.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-bd678835\">11. What is the best test for heat-fixation sharpness loss?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-26c648b5\">Use a fixed fine-line pattern and measure line width, edge roughness and fabric dimensions before fixation, after fixation and after reduction clearing.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-1527836e\">12. What should I send FSX Chemical for heat-fixation sharpness troubleshooting?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3990400a\">Send the polyester construction, disperse ink\/TDS, pretreatment\/TDS and add-on, drying\/moisture conditions, pre-fixation image, fixation temperature\/time or line speed, post-fixation image and final clearing results.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-8aa0ea42\">Find the Stage Where Sharpness Is Actually Lost<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8702922d\">If direct disperse printing on polyester is sharp after printing but becomes wider, softer or less defined after heat fixation, FSX Chemical can help separate ink migration, pretreatment-film behavior and fabric thermal movement through a controlled before\/after fixation comparison.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-68f82700\">Mulailah dengan\u00a0<a href=\"https:\/\/fsxchemical.com\/id\/layanan\/sampel-yang-cocok\/\">Sampel &amp; Pencocokan Grade<\/a>\u00a0and provide your current polyester, disperse ink, pretreatment and heat-fixation conditions.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0a04fbcd\">Ulasan\u00a0<a href=\"https:\/\/fsxchemical.com\/id\/product\/pasta-cetak-digital\/\">Digital Textile Printing Pretreatment<\/a>\u00a0for current FSX pretreatment routes\ud83d\udce7\u00a0<strong>Email<a href=\"https:\/\/fsxchemical.com\/id\/hubungi-kami\/\">: Service@fsxchemical.com<\/a><\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2dee273e\"><strong>The correct fix is not automatically more thickener or lower fixation temperature. It is to identify whether image geometry changes before heat, during heat or during clearing, then control ink mobility, polymer add-on, fabric dimensions and thermal severity at the stage where the change actually begins.<\/strong><\/p>","protected":false},"excerpt":{"rendered":"<p>Direct disperse inkjet prints can look sharp immediately after printing yet become softer, wider or less defined after heat fixation. When this happens, the root cause is not automatically the printer. High-temperature fixation changes the mobility of disperse dye, residual ink vehicles, pretreatment polymers and the polyester substrate itself. If the printed image still contains mobile dye or liquid, heat can continue the redistribution that began during printing. If the pretreatment film softens or releases dye unevenly, edge definition can change during fixation. If the fabric shrinks, relaxes or changes geometry under heat and tension, measured line width and edge appearance can also change. The correct diagnosis compares image geometry before fixation, after fixation and after reduction clearing, while holding ink load, pretreatment add-on, fabric tension and thermal conditions under control.<\/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":"Why Disperse Digital Prints Lose Sharpness During Heat Fixation: Ink Migration, Fabric and Pretreatment Causes","_seopress_titles_desc":"Learn why direct disperse digital prints lose sharpness during heat fixation and how ink migration, pretreatment films, polyester shrinkage, moisture and thermal conditions affect edges.","_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":[1645,1651,1652,1195,1599,1290,1649,1647],"class_list":["post-11589","post","type-post","status-publish","format-standard","hentry","category-technical-guides","tag-disperse-digital-printing","tag-heat-fixation","tag-ink-migration","tag-polyester-printing","tag-pretreatment","tag-print-sharpness","tag-reduction-clearing","tag-thermofixation"],"acf":[],"_links":{"self":[{"href":"https:\/\/fsxchemical.com\/id\/wp-json\/wp\/v2\/posts\/11589","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fsxchemical.com\/id\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fsxchemical.com\/id\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fsxchemical.com\/id\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fsxchemical.com\/id\/wp-json\/wp\/v2\/comments?post=11589"}],"version-history":[{"count":3,"href":"https:\/\/fsxchemical.com\/id\/wp-json\/wp\/v2\/posts\/11589\/revisions"}],"predecessor-version":[{"id":11592,"href":"https:\/\/fsxchemical.com\/id\/wp-json\/wp\/v2\/posts\/11589\/revisions\/11592"}],"wp:attachment":[{"href":"https:\/\/fsxchemical.com\/id\/wp-json\/wp\/v2\/media?parent=11589"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fsxchemical.com\/id\/wp-json\/wp\/v2\/categories?post=11589"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fsxchemical.com\/id\/wp-json\/wp\/v2\/tags?post=11589"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}