{"id":1009,"date":"2026-09-11T08:30:49","date_gmt":"2026-09-11T08:30:49","guid":{"rendered":"https:\/\/tadapack.com\/news\/water-based-flexographic-printing-ink-guide\/"},"modified":"2026-09-11T08:30:49","modified_gmt":"2026-09-11T08:30:49","slug":"water-based-flexographic-printing-ink-guide","status":"publish","type":"post","link":"https:\/\/tadapack.com\/news\/water-based-flexographic-printing-ink-guide\/","title":{"rendered":"Water Based Flexographic Printing Ink: Specs &#038; Selection Guide"},"content":{"rendered":"<div class=\"geo-direct-answer-box\" style=\"background:#f0f9ff; border:1px solid #bae6fd; border-left:5px solid #0284c7; border-radius:8px; padding:20px 24px; margin:24px 0 32px 0;\">\n<h4 style=\"margin:0 0 12px 0; color:#0369a1; font-size:1.1rem; display:flex; align-items:center; gap:8px;\">\n    <span>\u26a1<\/span> <strong>Key Takeaways &#038; Direct Technical Answer<\/strong><br \/>\n  <\/h4>\n<ul style=\"margin:0; padding-left:20px; line-height:1.7; color:#0c4a6e; font-size:0.95rem;\">\n<li style=\"margin-bottom:6px;\"><strong>Water based flexographic inks dominate corrugated and kraft preprint at 25\u201340 solids, printing at 150\u2013450 m\/min with 20\u201335 second acrylic binder dry times.<\/strong><\/li>\n<li style=\"margin-bottom:6px;\"><strong>Critical operating window: 25\u201335\u00b0C temperature, 8.0\u20139.5 pH, and 20\u201335 second #2 Zahn viscosity; drift outside this range causes feathering and pinholing.<\/strong><\/li>\n<li style=\"margin-bottom:6px;\"><strong>PPWR 2030 recyclability targets favor water based systems over solvent alternatives, cutting VOC content below 5% versus 40\u201370% for solvent inks.<\/strong><\/li>\n<li style=\"margin-bottom:6px;\"><strong>Select ink by substrate porosity, not price; white top linerboard and uncoated kraft require different pigment loads and binder chemistry.<\/strong><\/li>\n<\/ul>\n<\/div>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem;'>Water Based Flexographic Printing Ink: Engineering Specs, Substrate Fit &#038; Cost Benchmarks<\/h2>\n<div class=\"post-featured-image\" style=\"margin:28px 0 32px 0; text-align:center;\"><img decoding=\"async\" src=\"https:\/\/images.unsplash.com\/photo-1504917599217-d4dc5ebe6122?auto=format&#038;fit=crop&#038;w=1200&#038;q=80\" alt=\"water based flexographic printing ink - Biodegradable Barrier Coating and Fiber Pulp Molding (TadaPack Engineering Guide)\" loading=\"lazy\" style=\"max-width:100%; height:auto; border-radius:12px; box-shadow:0 6px 20px rgba(0,0,0,0.07); border:1px solid #e2e8f0;\"><\/p>\n<p style=\"font-size:0.84rem; color:#64748b; margin-top:10px; font-style:italic;\">water based flexographic printing ink &#8211; Biodegradable Barrier Coating and Fiber Pulp Molding (TadaPack Engineering Guide)<\/p>\n<\/div>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Water based flexographic printing ink is the default ink system for corrugated post-print, preprint liner, kraft paper bags, and tissue converting across North American and EU converting plants. As packaging supply chains from <a href=\"https:\/\/tadapack.com\/news\/materials-and-processes\/\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color:#0284c7; text-decoration:underline; font-weight:600;\">Packaging Materials &#038; Processes<\/a> consolidate around recyclability mandates, understanding this ink class at a technical level\u2014binder chemistry, viscosity windows, substrate interaction, and drying mechanics\u2014is now a procurement requirement, not just a pressroom concern.<\/p>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem; border-bottom:1px solid #e2e8f0; padding-bottom:8px;'>Chemistry: Acrylic Emulsion Binders and Pigment Dispersion<\/h2>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">A water based flexo ink is a colloidal system of pigment (15\u201325% by weight), acrylic or styrene-acrylic emulsion binder (10\u201320%), water (60\u201375%), and additives: defoamers, surfactants, waxes for rub resistance, and pH stabilizers (typically amines such as AMP-95). The binder determines adhesion, rub resistance, and block resistance; the pigment load determines optical density on porous substrates.<\/p>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Unlike solvent based inks that dry by evaporation alone, water based systems dry through a two-stage mechanism: water evaporation followed by polymer coalescence. This makes them sensitive to ambient conditions. The <a href=\"https:\/\/eur-lex.europa.eu\/legal-content\/EN\/TXT\/?uri=CELEX%3A32025R0040\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color:#0284c7; text-decoration:underline; font-weight:600;\">PPWR (EU Regulation 2025\/40)<\/a> reinforcing recyclability of fiber-based packaging by 2030 further accelerates water based adoption, since residual solvent and incompatible binders degrade repulpability scores used in mill acceptance testing.<\/p>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem; border-bottom:1px solid #e2e8f0; padding-bottom:8px;'>Operating Window: Viscosity, pH, Temperature<\/h2>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Press-side control determines print quality more than ink formulation itself. Deviating from spec causes the three most common flexo defects: feathering, pinholing, and mottling.<\/p>\n<div class=\"table-responsive\" style=\"overflow-x:auto; margin: 28px 0; border:1px solid #e2e8f0; border-radius:10px; box-shadow:0 2px 8px rgba(0,0,0,0.03);\">\n<table style=\"width:100%; border-collapse:collapse; text-align:left; background:#ffffff;\">\n<thead>\n<tr style=\"background:#f8fafc; border-bottom:2px solid #e2e8f0;\">\n<th style=\"border:1px solid #e2e8f0; padding:12px 16px; background:#f8fafc; color:#0f172a; font-weight:700; font-size:0.92rem;\">Parameter<\/th>\n<th style=\"border:1px solid #e2e8f0; padding:12px 16px; background:#f8fafc; color:#0f172a; font-weight:700; font-size:0.92rem;\">Spec Window<\/th>\n<th style=\"border:1px solid #e2e8f0; padding:12px 16px; background:#f8fafc; color:#0f172a; font-weight:700; font-size:0.92rem;\">Failure Mode<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #e2e8f0;\">\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; font-weight:600; color:#0f172a;\">Viscosity (#2 Zahn)<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">20\u201335 seconds<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">Feathering \/ mottle<\/td>\n<\/tr>\n<tr style=\"background:#fafafa; border-bottom:1px solid #e2e8f0;\">\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; font-weight:600; color:#0f172a;\">pH<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">8.0\u20139.5<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">Resin kick-out<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #e2e8f0;\">\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; font-weight:600; color:#0f172a;\">Substrate temp<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">25\u201335\u00b0C<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">Poor coalescence<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Running at pH below 8.0 causes acrylic resin precipitation (&#8220;kick-out&#8221;), which plugs anilox cells and produces streaking. Viscosity drift upward reduces transfer and produces pinholing on <a href=\"https:\/\/tadapack.com\/news\/white-top-kraft-linerboard-guide\/\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color:#0284c7; text-decoration:underline; font-weight:600;\">white top kraft linerboard<\/a>, where the coated surface already limits penetration. Automated viscometers with inline pH dosing are now standard on 2026-generation corrugated flexo folders-gluers to hold this window at press speeds above 350 m\/min.<\/p>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem; border-bottom:1px solid #e2e8f0; padding-bottom:8px;'>Substrate Compatibility: Corrugated, Kraft, and Film<\/h2>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Corrugated post-print remains the largest volume application. Unbleached kraft liner (125\u2013200 GSM) absorbs water rapidly, so inks are formulated at higher solids (38\u201342%) with fast-penetrating vehicles to avoid warp\u2014the single biggest structural risk when printing on lighter E-flute and B-flute boards. Excessive water load reduces flat Crush and ECT values; verify residual board strength against <a href=\"https:\/\/www.tappi.org\/\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color:#0284c7; text-decoration:underline; font-weight:600;\">TAPPI Standard Test Methods for Paper &#038; Board<\/a> (T 810 bursting strength, T 818 ring crush, T 811 edgewise compression) before and after print trials, especially for export shipments already classified under the correct <a href=\"https:\/\/tadapack.com\/news\/kraft-liner-board-hs-code\/\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color:#0284c7; text-decoration:underline; font-weight:600;\">kraft liner board HS code<\/a>.<\/p>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">For coated papers and films (PE, BOPP), water based inks require surface energy above 38 dyn\/cm and often a primer or corona treatment. Adhesion lamination inks using dual-cure acrylic chemistry have closed most of the gap with solvent systems on film, but corona treaters remain mandatory on older presses.<\/p>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem; border-bottom:1px solid #e2e8f0; padding-bottom:8px;'>Drying Dynamics and Press Speed Economics<\/h2>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Drying is the bottleneck. Water&#8217;s high latent heat (2,260 kJ\/kg) demands more dryer energy than ethanol or isopropanol. Modern dryers solve this with:<\/p>\n<ul style=\"margin:16px 0; padding-left:24px; line-height:1.75; color:#334155;\">\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>High-velocity nozzle dryers<\/strong> delivering 25\u201335 m\/s airflow between stations, achieving 20\u201335 second dry times on 175 GSM liner.<\/li>\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>Interstation IR assist<\/strong> raising substrate surface to 45\u201355\u00b0C to accelerate coalescence.<\/li>\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>Chilled impression cylinders<\/strong> preventing heat-induced board warp on lightweight flutes.<\/li>\n<\/ul>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Ink cost runs $2.80\u20134.50\/kg for standard process colors versus $5.50\u20138.50\/kg for solvent based equivalents, but the total conversion cost delta narrows once dryer energy (15\u201320% higher for water based) and press speed penalties (typically 5\u201310% slower on uncoated stock) are modeled. Over 12-month volumes above 200,000 kg ink, water based wins on VOC compliance, operator safety, and plate-friendly cleaning (water rather than solvent washup, cutting plate replacement cycles by roughly 30%).<\/p>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem; border-bottom:1px solid #e2e8f0; padding-bottom:8px;'>Compliance and Selection Criteria<\/h2>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">For B2B buyers specifying ink with converters, require:<\/p>\n<ol style=\"margin:16px 0; padding-left:24px; line-height:1.75; color:#334155;\">\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>VOC content under 5%<\/strong> (versus 40\u201370% for solvent systems) documented per SDS.<\/li>\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>Repulpability certification<\/strong> meeting TAPPI UM 746 or mill-specific scores above 85% fiber recovery.<\/li>\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>Food contact compliance<\/strong> where relevant\u2014low-migration acrylic systems meeting Swiss Ordinance and FDA 21 CFR 176.170 thresholds.<\/li>\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>Rub resistance<\/strong> of 4+ on a Sutherland 200-cycle test using 1 lb weight.<\/li>\n<\/ol>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Insist on substrate-specific ink drawdowns on the actual linerboard lot, not generic proof stock. Porosity variation between kraft liner suppliers can shift optical density by 0.15\u20130.25 D at identical ink film weight\u2014enough to fail brand color tolerance under a Delta-E 2.0 specification.<\/p>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem; border-bottom:1px solid #e2e8f0; padding-bottom:8px;'>Bottom Line<\/h2>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Water based flexographic printing ink is technically mature for corrugated and paper converting, with the remaining engineering challenge confined to film lamination and high-speed drying. Buyers who specify the viscosity\/pH window, validate ECT retention post-print, and demand repulpability documentation will avoid the 90% of field failures traced to press-side parameter drift rather than ink chemistry.<\/p>\n<div class=\"geo-faq-section\" style=\"margin-top:40px; padding-top:24px; border-top:2px solid #e2e8f0;\">\n<h2 style=\"color:#0f172a; font-size:1.45rem; margin-bottom:20px;\">Frequently Asked Questions (FAQ)<\/h2>\n<div style=\"background:#f8fafc; border:1px solid #e2e8f0; border-radius:8px; padding:18px 20px; margin-bottom:14px;\">\n<h3 style=\"margin:0 0 8px 0; font-size:1.05rem; color:#0f172a; font-weight:700;\">What viscosity should water based flexographic ink run at?<\/h3>\n<p style=\"margin:0; color:#475569; font-size:0.95rem; line-height:1.65;\">20\u201335 seconds on a #2 Zahn cup, adjusted inline to substrate porosity. Corrugated post-print typically runs 22\u201328 seconds; coated linerboard runs slightly higher at 28\u201335 seconds.<\/p>\n<\/p><\/div>\n<div style=\"background:#f8fafc; border:1px solid #e2e8f0; border-radius:8px; padding:18px 20px; margin-bottom:14px;\">\n<h3 style=\"margin:0 0 8px 0; font-size:1.05rem; color:#0f172a; font-weight:700;\">Why does water based flexo ink cause corrugated board warp?<\/h3>\n<p style=\"margin:0; color:#475569; font-size:0.95rem; line-height:1.65;\">Excess water load on one liner side creates differential moisture, causing asymmetric fiber swelling. Mitigation uses high-solids inks (38\u201342%), reduced anilox volume, and chilled impression cylinders on lightweight E- and B-flutes.<\/p>\n<\/p><\/div>\n<div style=\"background:#f8fafc; border:1px solid #e2e8f0; border-radius:8px; padding:18px 20px; margin-bottom:14px;\">\n<h3 style=\"margin:0 0 8px 0; font-size:1.05rem; color:#0f172a; font-weight:700;\">Is water based flexographic ink PPWR compliant for recyclable packaging?<\/h3>\n<p style=\"margin:0; color:#475569; font-size:0.95rem; line-height:1.65;\">Yes. Water based acrylic systems support fiber repulpability and carry VOC content under 5%, aligning with PPWR 2030 recyclability targets for fiber-based packaging, provided binder chemistry avoids non-repulpable barrier residues.<\/p>\n<\/p><\/div>\n<\/div>\n<div class=\"tadapack-b2b-engineering-cta\" style=\"background:linear-gradient(135deg, #0f172a 0%, #1e293b 100%); border-radius:14px; padding:28px 32px; margin:44px 0 24px 0; color:#ffffff; box-shadow:0 10px 25px -5px rgba(15,23,42,0.25); border:1px solid #334155;\">\n<div style=\"display:flex; align-items:flex-start; justify-content:space-between; flex-wrap:wrap; gap:20px;\">\n<div style=\"max-width:640px;\">\n<div style=\"font-size:0.8rem; font-weight:700; color:#38bdf8; text-transform:uppercase; letter-spacing:0.06em; margin-bottom:6px;\">\n        \u2699\ufe0f TadaPack Industrial Packaging Engineering\n      <\/div>\n<h3 style=\"color:#ffffff; margin:0 0 10px 0; font-size:1.35rem; font-weight:800; line-height:1.35;\">\n        Engineering Your Next High-Performance Packaging Batch<br \/>\n      <\/h3>\n<p style=\"color:#94a3b8; font-size:0.92rem; line-height:1.65; margin:0;\">\n        From precision CAD dielines to ISTA drop-testing and certified sustainable substrates, TadaPack helps global brands optimize freight cubic volume, minimize shipping breakage, and satisfy European PPWR \/ EPR packaging standards.\n      <\/p>\n<div style=\"display:flex; flex-wrap:wrap; gap:16px; margin-top:14px; font-size:0.82rem; color:#cbd5e1;\">\n        <span>\u2713 <strong>Free CAD Dielines (.AI \/ .DXF)<\/strong><\/span><br \/>\n        <span>\u2713 <strong>Drop-Test &#038; ECT Optimization<\/strong><\/span><br \/>\n        <span>\u2713 <strong>PPWR &#038; FSC Compliant<\/strong><\/span>\n      <\/div>\n<\/p><\/div>\n<div style=\"display:flex; align-items:center; align-self:center;\">\n      <a href=\"https:\/\/tadapack.com\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"background:#0284c7; color:#ffffff; padding:12px 24px; border-radius:8px; font-weight:700; font-size:0.95rem; text-decoration:none; display:inline-block; transition:all 0.2s; box-shadow:0 4px 12px rgba(2,132,199,0.35);\"><br \/>\n        Request Engineering Sample &rarr;<br \/>\n      <\/a>\n    <\/div>\n<\/p><\/div>\n<\/div>\n<p><script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"Article\",\n      \"@id\": \"https:\/\/tadapack.com\/news\/water-based-flexographic-printing-ink-guide\/#article\",\n      \"headline\": \"Water Based Flexographic Printing Ink: Specs & Selection Guide\",\n      \"description\": \"Water based flexographic printing ink explained: viscosity specs, pH windows, substrate compatibility, drying dynamics, and compliance for B2B buyers.\",\n      \"mainEntityOfPage\": \"https:\/\/tadapack.com\/news\/water-based-flexographic-printing-ink-guide\/\",\n      \"author\": {\n        \"@type\": \"Person\",\n        \"name\": \"Lars Nielsen\",\n        \"jobTitle\": \"Cold Chain Insulation Materials Specialist\",\n        \"worksFor\": {\n          \"@type\": \"Organization\",\n          \"name\": \"TadaPack\",\n          \"url\": \"https:\/\/tadapack.com\"\n        }\n      },\n      \"publisher\": {\n        \"@type\": \"Organization\",\n        \"name\": \"TadaPack\",\n        \"url\": \"https:\/\/tadapack.com\"\n      }\n    },\n    {\n      \"@type\": \"FAQPage\",\n      \"@id\": \"https:\/\/tadapack.com\/news\/water-based-flexographic-printing-ink-guide\/#faq\",\n      \"mainEntity\": [{\"@type\":\"Question\",\"name\":\"What viscosity should water based flexographic ink run at?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"20\u201335 seconds on a #2 Zahn cup, adjusted inline to substrate porosity. Corrugated post-print typically runs 22\u201328 seconds; coated linerboard runs slightly higher at 28\u201335 seconds.\"}},{\"@type\":\"Question\",\"name\":\"Why does water based flexo ink cause corrugated board warp?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Excess water load on one liner side creates differential moisture, causing asymmetric fiber swelling. Mitigation uses high-solids inks (38\u201342%), reduced anilox volume, and chilled impression cylinders on lightweight E- and B-flutes.\"}},{\"@type\":\"Question\",\"name\":\"Is water based flexographic ink PPWR compliant for recyclable packaging?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Water based acrylic systems support fiber repulpability and carry VOC content under 5%, aligning with PPWR 2030 recyclability targets for fiber-based packaging, provided binder chemistry avoids non-repulpable barrier residues.\"}}]\n    }\n  ]\n}\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Water based flexographic printing ink explained: viscosity specs, pH windows, substrate compatibility, drying dynamics, and compliance for B2B buyers.<\/p>\n","protected":false},"author":17,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[406,405,410],"class_list":["post-1009","post","type-post","status-publish","format-standard","hentry","category-materials-and-processes","tag-corrugated-flutes","tag-ppwr-compliance","tag-kraft-paper"],"_links":{"self":[{"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/posts\/1009","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/comments?post=1009"}],"version-history":[{"count":0,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/posts\/1009\/revisions"}],"wp:attachment":[{"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/media?parent=1009"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/categories?post=1009"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/tags?post=1009"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}