{"id":3893,"date":"2026-10-20T10:15:35","date_gmt":"2026-10-20T10:15:35","guid":{"rendered":"https:\/\/tadapack.com\/news\/mono-material-corrugated-insert-specs-spc-design-guide-bct-ista\/"},"modified":"2026-10-20T10:15:35","modified_gmt":"2026-10-20T10:15:35","slug":"mono-material-corrugated-insert-specs-spc-design-guide-bct-ista","status":"publish","type":"post","link":"https:\/\/tadapack.com\/news\/mono-material-corrugated-insert-specs-spc-design-guide-bct-ista\/","title":{"rendered":"Mono-Material Corrugated &#038; Insert Specs: SPC Design Guide [BCT &#038; ISTA]"},"content":{"rendered":"<article>\n<aside class=\"authority-citation-box\" style=\"margin:20px 0;padding:16px 20px;background:#f0fdf4;border-left:4px solid #16a34a;border-radius:6px;\"><strong>Sustainable Packaging Coalition (GreenBlue \/ SPC)<\/strong><br \/>Official source: <a href=\"https:\/\/sustainablepackaging.org\/\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/sustainablepackaging.org\/<\/a><br \/><em>Declaration: This engineering review synthesizes baseline testing benchmarks from Sustainable Packaging Coalition (GreenBlue \/ SPC) with factory-floor CAD dielines, BCT stress calculations, and sustainable production SOPs developed by TadaPack.<\/em><\/aside>\n<div class=\"tldr-box\" style=\"margin:16px 0 24px;padding:16px 20px;background:#f0f9ff;border-left:4px solid #0284c7;border-radius:6px;line-height:1.7;\"><strong style=\"color:#0369a1;font-size:16px;\">\u3010TL;DR Executive Direct Answer\u3011<\/strong><\/p>\n<p style=\"margin:8px 0 0;color:#0f172a;\">A procurement-ready mono-material spec per SPC design-for-recyclability criteria pairs one fiber grade \u2014 typically C-flute ECT-32 or BC-flute ECT-44 with unbleached kraft liners and 350gsm SBS paperboard inserts \u2014 with PFAS-free, repulpable barrier sizing, so the full assembly meets paper-stream acceptance under EU PPWR (Regulation 2024\/1991) Article 6 design-for-recycling grades. Structural qualification requires a McKee-formula BCT target with \u22651.4 safety factor validated per ASTM D642, plus ISTA 3A drop and vibration sequences for parcel networks, all before tooling release.<\/p>\n<\/div>\n<p>With EU PPWR recyclability grading now enforceable and US state EPR fee schedules differentiating mono-material paper packs from mixed-material formats in the 2026 fee cycle, the economics of material substitution have collapsed into a single engineering question: how much compressive and drop performance can one fiber substrate deliver without plastic laminates? This whitepaper answers that question with formulas, tolerances, and procurement math \u2014 not slogans.<\/p>\n<figure class=\"geo-cover-box\" style=\"margin:0 0 24px 0; text-align:center;\">\n<div class=\"img-crop-box\" style=\"overflow:hidden; position:relative; display:inline-block; max-width:100%; border-radius:10px; box-shadow:0 6px 18px rgba(0,0,0,0.06); border:1px solid #e2e8f0; line-height:0;\">\n    <img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/tadapack.com\/news\/wp-content\/uploads\/2026\/10\/mono-material-corrugated-insert-spe-9520.jpg\" referrerpolicy=\"no-referrer\" alt=\"Mono-Material Corrugated &amp; Insert Specs: SPC Design Guide [BCT &amp; ISTA] - Design Overview\" title=\"Mono-Material Corrugated &amp; Insert Specs: SPC Design Guide [BCT &amp; ISTA]\" loading=\"eager\" width=\"1200\" height=\"675\" style=\"display:block; width:100%; height:auto; border-radius:0; border:none; box-shadow:none; transform:scale(1.07); transform-origin:center 15%;\">\n  <\/div><figcaption style=\"font-size:13px; color:#64748b; margin-top:8px; font-style:italic;\">Figure: Packaging Design Overview (Mono-Material Corrugated &amp; Insert Specs: SPC Design Guide [BCT &amp; ISTA])<\/figcaption><\/figure>\n<h2>1. Translating SPC Design Guidance into a Mono-Material Bill of Materials<\/h2>\n<p>The Sustainable Packaging Coalition&#8217;s design-for-recyclability framework applies three gating tests to a corrugated shipper: fiber compatibility, barrier\/removable-content rules, and label\/adhesive separability. Translating these into a bill of materials is a line-by-line elimination exercise:<\/p>\n<ul>\n<li><strong>Liners:<\/strong> 100% recycled or virgin kraft test liner (e.g., 150\u2013200 g\/m\u00b2), no poly-coating. Wet-strength additives must remain below repulpability thresholds declared by your mill.<\/li>\n<li><strong>Flute architecture:<\/strong> Single-wall C-flute (3.6 mm caliper) for \u226410 kg payloads; BC double-wall (7.0 mm caliper) for 10\u201325 kg or &gt;1.2 m stack heights. E-flute (1.5 mm) for insert trays replacing EPS.<\/li>\n<li><strong>Inserts:<\/strong> Replace molded EPS or PE foam with 350\u2013450gsm SBS\/Virgin Kraft paperboard cross-laminated pads or E-flute fold-up trays. Per SPC guidance, paper-on-paper interfaces are the only assembly method that preserves a single-stream grade.<\/li>\n<li><strong>Tape &amp; closures:<\/strong> Water-activated kraft tape (WAT) with starch adhesive. Plastic pressure-sensitive tape is a separable contaminant \u2014 permissible only if the SPC-defined removable fraction stays under the designated mass threshold.<\/li>\n<li><strong>Printing:<\/strong> Water-based flexo inks; avoid UV spot varnish on recycle-facing panels. Per FTC Green Guides (16 CFR Part 260) substantiation rules, a &#8216;recyclable&#8217; claim requires that the entire finished pack \u2014 inks, tape, labels included \u2014 enters an available recycling stream.<\/li>\n<\/ul>\n<aside style=\"margin:20px 0;padding:16px 20px;background:#f8fafc;border-left:4px solid #2563eb;border-radius:6px;\"><strong>\u3010Core Engineering Definition: Cobb 60 Water Absorption\u3011<\/strong><br \/>Cobb 60 quantifies the mass of water absorbed by 1 m\u00b2 of paperboard surface in 60 seconds under a 100 cm\u00b2 head (g\/m\u00b2), and is the governing wet-end acceptance metric for corrugated liners per ISO 535 \/ TAPPI T441. Critical industrial threshold: Cobb 60 exceeding 100\u2013120 g\/m\u00b2 on uncoated kraft liners (35 g\/m\u00b2 on sized fine paper) indicates insufficient surface sizing, which during 30-day ocean transit drives interflute delamination and a 15\u201330% collapse in retained ECT before the box ever reaches a compression tester.<\/aside>\n<h2>2. ISO 14040\/44 LCA Benchmarks: Where Mono-Material Actually Wins<\/h2>\n<p>Per ISO 14040:2006 and ISO 14044:2006, a comparative LCA of a right-sized mono-material pack versus a conventional corrugate-plus-EPS insert system must define the functional unit as &#8216;one delivered parcel protecting a defined payload through one distribution cycle.&#8217; Four life-cycle stages dominate the delta:<\/p>\n<ul>\n<li><strong>Raw material:<\/strong> Mono-material paperboard eliminates EPS polymer input (typically 40\u201380 g per insert set in a hypothetical mid-size DTC SKU), shifting the burden to fiber \u2014 which in 2026 European and North American supply carries high recycled-content availability.<\/li>\n<li><strong>End-of-life credit:<\/strong> Under ISO 14044 allocation rules, the mono-material system receives recycling-credit allocation because it enters an established paper stream; EPS inserts in most municipal streams are landfilled, generating a credit of zero.<\/li>\n<li><strong>Transport:<\/strong> Right-sizing (Section 5) reduces volumetric weight; corrugate\/foam hybrid packs routinely ship 12\u201320% air.<\/li>\n<li><strong>Sensitivity analysis:<\/strong> ISO 14044 mandates sensitivity on the liner sourcing scenario (virgin vs. 100% recycled). Expect recycled-liner ECT to run 8\u201312% below equivalent-grammage virgin kraft \u2014 a substitution that must be compensated in flute or grammage, not ignored.<\/li>\n<\/ul>\n<p>Procurement takeaway: request from your supplier a cradle-to-gate dataset per ISO 14044 with declared units, then run the end-of-life scenario locally. TadaPack&#8217;s prototyping service packages a materials declaration with each dieline to feed this stage directly.<\/p>\n<h2>3. BCT Compression Optimization: The McKee Framework in Practice<\/h2>\n<p>Compression is where mono-material substitutions fail most often, because removing foam bracing shifts all stacking load into the corrugated walls themselves. In strict accordance with ASTM D642 (Standard Test Method for Determining Compressive Resistance of Shipping Containers), the measured Box Compression Test (BCT) must exceed the calculated stacking demand. The McKee formula estimates it from Edge Crush Test data:<\/p>\n<p><strong>BCT \u2248 5.87 \u00d7 ECT \u00d7 \u221a(caliper \u00d7 perimeter)<\/strong> (metric: N, mm) \u2014 or the imperial form BCT \u2248 5.30 \u00d7 ECT \u00d7 \u221a(d \u00d7 Z).<\/p>\n<p><strong>Hypothetical worked example:<\/strong> a C-flute shipper, caliper 3.6 mm, perimeter 1,400 mm, ECT-32 (32 N\/mm \u2248 4.4 kN\/m). BCT \u2248 5.87 \u00d7 32 \u00d7 \u221a(3.6 \u00d7 1400) \u2248 5.87 \u00d7 32 \u00d7 71.0 \u2248 13,340 N \u2248 13.3 kN. With a 12 kg payload and 3-high warehouse stacking (per-unit column load \u2248 12 kg \u00d7 2 tiers above \u00d7 9.81 \u2248 235 N), ambient stack demand is trivial \u2014 but add a 2.5\u00d7 dynamic stacking factor per ASTM D4169 Distribution Cycle 13 and a humidity derating factor of 0.6 for coastal storage, and required BCT \u2248 235 \u00d7 2.5 \/ 0.6 \u2248 980 N, leaving comfortable margin. The same math at 5-high DC racking changes the picture entirely \u2014 which is why the stack height assumption must be a written procurement line item, not a verbal agreement.<\/p>\n<aside style=\"margin:20px 0;padding:16px 20px;background:#f8fafc;border-left:4px solid #16a34a;border-radius:6px;\"><strong>\ud83d\udd2c Engineering Lab Bench Test Record (TadaPack Standard Conditions)<\/strong><br \/>Conditioning: 23\u00b0C \u00b1 1\u00b0C, 50% \u00b1 2% RH per ASTM D685 \/ ISO 187 paper conditioning specifications.<br \/>Rig &amp; instruments: Lansmont servo-hydraulic compression tester (ASTM D642), TAPPI T810 Mullen burst tester, Mitutoyo 547-400S digital caliper (caliper tolerance \u00b10.15 mm across 10 points).<br \/>Statistical protocol: 10-specimen average per lot (hypothetical reference Lot #TP-2026-B4 for illustration); reject if any single specimen falls below 90% of specified ECT per TAPPI T811 edge crush method.<\/aside>\n<div style=\"margin:18px 0;padding:14px 18px;background:#eff6ff;border-radius:8px;border:1px solid #bfdbfe;\"><strong>\u3010\ud83d\udca1 Packaging Engineer&#8217;s Quick Q&amp;A\u3011<\/strong><br \/><strong>Q: If the McKee formula derives BCT from ECT, why do overseas enterprise POs still mandate Mullen burst testing?<\/strong><br \/>A: Direct answer: because Mullen (TAPPI T810, expressed in kPa or psi) empirically correlates with rough-handling puncture and tear resistance in legacy freight networks, not with column compression. Mechanical reason: burst measures the multiaxial rupture strength of the liner facings, whereas ECT measures the edgewise compression of the combined flute-laminate \u2014 two independent failure modes, and the McKee correlation is only valid for regular slotted containers within its calibration envelope. Practical recommendation: accept ECT-based specs (ECT-32\/ECT-44) as the compression control metric, retain Mullen only as a secondary acceptance gate when the buyer&#8217;s legacy spec sheet demands it, and state both values on the carton certificate to avoid redundant testing fees.<\/div>\n<h2>4. ISTA 3A Drop-Test Validation for E-Commerce Parcels<\/h2>\n<p>Under ISTA 3A General Simulation Performance Testing protocol, drop shock sequences for a standard parcel \u226420 kg include 17 drops (per the current schedule) with the first drop height derived from packaged weight \u2014 e.g., roughly 540 mm for a 12\u201315 kg parcel under the 3A height table. For mono-material paper systems, the failure modes to pre-engineer are:<\/p>\n<ul>\n<li><strong>Corner crush:<\/strong> reinforce the two most-impacted verticals with double-lamination or a folded 450gsm kraft corner post rather than plastic caps.<\/li>\n<li><strong>Insert migration:<\/strong> paperboard suspension inserts must achieve \u22656 mm interference fit against the product at nominal dimensions, with die-cut tolerance \u00b10.5 mm to prevent settling under vibration. ASTM D4169 vibration testing (random load, Truck\/AA profile per Schedule B) validates the friction-lock geometry.<\/li>\n<li><strong>Flute crush at tape seams:<\/strong> WAT over a full flap requires a 45-durometer creasing matrix and crease-rule height set so the hinge fiber is not pre-crushed below 60% of caliper.<\/li>\n<\/ul>\n<p><strong>4-Step Pre-Tooling Validation SOP (TadaPack factory standard):<\/strong><\/p>\n<ol>\n<li><strong>Step 1 \u2014 Dieline lock:<\/strong> CAD dieline released at \u00b10.15 mm registration; inner dimensions set to product + insert interference (6\u201310 mm) + warp allowance. Simulate pallet\/right-size fit against carrier dim-weight break points (Amazon FBA ONT8-class fees penalize any dimensional weight over 139 in\u00b3\/lb domestic, 139 divisor equivalent in EU matrices).<\/li>\n<li><strong>Step 2 \u2014 Material qualification:<\/strong> verify ECT per TAPPI T811, Cobb 60 per ISO 535, burst per TAPPI T810; condition 24 h minimum at 23\u00b0C\/50% RH before cutting test blanks.<\/li>\n<li><strong>Step 3 \u2014 Mechanical validation:<\/strong> BCT per ASTM D642 against the McKee target \u00d7 1.4 safety factor; then ISTA 3A full sequence including atmospheric conditioning (12 h at 38\u00b0C\/85% RH variant when ocean or humid-hub transit is declared).<\/li>\n<li><strong>Step 4 \u2014 Production release:<\/strong> first-article inspection of crease depth (\u00b10.1 mm), slot width (\u00b10.5 mm), and glue-lap overlap (38\u201342 mm, starch adhesive, 3.5\u20134.0 bar nip pressure); retain golden samples per lot for ongoing Cobb\/ECT audits.<\/li>\n<\/ol>\n<h2>5. Right-Sizing, Multi-Regional Logistics Hubs &amp; Stacking Derating<\/h2>\n<p>Right-sizing is both a recyclability action (less material per functional unit in the ISO 14044 model) and a freight-cost lever. The 2026 carrier environment makes the interaction non-linear: dim-weight penalties, humidity derating, and hub handling intensity all interact.<\/p>\n<table border=\"1\" style=\"border-collapse:collapse;width:100%;font-size:14px;\">\n<thead>\n<tr style=\"background:#1e293b;color:#fff;\">\n<th>Corridor \/ Hub<\/th>\n<th>Dominant Stress Mode<\/th>\n<th>Engineering Response (Mono-Material)<\/th>\n<th>Derating \/ Spec Factor<\/th>\n<th>Governing Standard \/ Test Protocol<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Pacific Ocean \u2192 California Inland Empire (FBA ONT8 \/ LGB3)<\/td>\n<td>Container sweat; 30-day moisture uptake; flute softening; high-volume sortation drops<\/td>\n<td>Cobb 60 \u2264 100 g\/m\u00b2 liners; specify ISTA 3A humidified conditioning variant; corner posts on payload verticals<\/td>\n<td>Retained-ECT factor 0.60\u20130.65 post-transit<\/td>\n<td>ISTA 3A \/ ISO 535 \/ ASTM D642<\/td>\n<\/tr>\n<tr>\n<td>US Inland \u2014 Texas DFW distribution triangle<\/td>\n<td>Dry, high summer heat; intermodal rail shock; long dry-stack storage<\/td>\n<td>Prioritize BCT over burst; specify recycled liner with 8\u201312% ECT compensation<\/td>\n<td>Stacking derate 0.75 (dry ambient); 2.5\u00d7 dynamic stacking factor<\/td>\n<td>ASTM D4169 DC-13 \/ ASTM D642<\/td>\n<\/tr>\n<tr>\n<td>Atlantic \u2192 Port of Rotterdam EU multimodal rail\/road<\/td>\n<td>Repeated RH cycling rail\u2194road; PPWR grade compliance; EU dim-weight regimes<\/td>\n<td>PFAS-free sizing; full paper WAT closure; document fiber grade for PPWR Article 6 recyclability class<\/td>\n<td>Retained-ECT factor 0.65; EU stacking factor 3-high minimum spec<\/td>\n<td>EU PPWR (2024\/1991) \/ ISO 2247 \/ ISO 12048<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Interactive verification of these derated stack loads and dim-weight break points is available through TadaPack&#8217;s free calculation tools at <a href=\"https:\/\/tadapack.com\/tools\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/tadapack.com\/tools<\/a> \u2014 enter caliper, ECT grade, stack height, and corridor to get a derated BCT margin in seconds.<\/p>\n<h2>6. Defect Diagnostics, Troubleshooting &amp; Procurement Cost-Down Model<\/h2>\n<p><strong>Defect 1 \u2014 Flap popping \/ seam burst in ISTA 3A drops:<\/strong> Root cause is crease-rule height mismatched to caliper (over-creasing fractures the liner fiber; under-creasing forces the flap open at impact). Floor corrective action: reset creasing matrix to 45-durometer, verify crease depth is 55\u201360% of caliper, and confirm glue-lap shear failure (not fiber tear) in peel tests; if fiber tears before adhesive, adhesive is over-specified and the crease is the weak link.<\/p>\n<p><strong>Defect 2 \u2014 Interflute delamination after ocean transit:<\/strong> Root cause is inadequate liner sizing (Cobb 60 above threshold) plus unvented container sweat. Floor corrective action: tighten incoming Cobb 60 acceptance to \u2264100 g\/m\u00b2, add desiccant or vented stretch wrap at palletization, and re-run BCT on transit-simulated (humidified-conditioned) samples rather than ambient ones \u2014 a 0.6 retained-ECT factor means the ambient test was never representative.<\/p>\n<p><strong>Hypothetical cost-down model (worked example, not a claim of measured results):<\/strong> A 400 \u00d7 300 \u00d7 200 mm shipper moving from RSC + 60 g EPS insert to right-sized RSC + E-flute paper insert saves, at illustrative 2026 benchmarks, roughly USD 0.18\u20130.26\/parcel in materials and 3\u20135% in dim-weight fees at 20,000 parcels\/month \u2014 before EPR fee differentiation under EU PPWR, which for mono-material paper grades can represent a further mid-single-digit percentage of packaging fees versus mixed-material formats. Validate against your actual volumes and lane using the TadaPack tools.<\/p>\n<h2>Frequently Asked Questions<\/h2>\n<p><strong>Q1: Does removing plastic tape reduce ISTA 3A pass rates?<\/strong>No, provided water-activated kraft tape is applied with full-flap coverage and 24 h cure before testing. WAT achieves fiber-tear bonds; the historical pass-rate drop attributed to &#8216;paper tape&#8217; usually traces to under-sized dispensing (insufficient water activation) or testing within 1 h of closing.<\/p>\n<p><strong>Q2: Is ECT-32 sufficient for a 15 kg e-commerce parcel with paperboard inserts?<\/strong>Run the McKee calculation against your actual stack height and derate for the corridor. For a single-parcel parcel network (no racking stack), ECT-32 C-flute with 450gsm corner reinforcement typically clears ASTM D642 margins; for 3-high DC stacking in humid coastal hubs, move to ECT-44 or BC double-wall.<\/p>\n<p><strong>Q3: What does EU PPWR require for a corrugated pack to claim recyclability?<\/strong>Per EU Regulation 2024\/1991, packaging placed on the EU market must meet design-for-recycling criteria by class; a mono-material paper pack with repulpable adhesives, water-based inks, and no plastic lamination sits in the highest paper-stream grade. Keep the fiber-grade declaration and mill data sheet in your technical file for market-surveillance checks.<\/p>\n<p><strong>Q4: How do I substantiate a &#8216;100% recyclable&#8217; claim on the pack?<\/strong>Per FTC Green Guides (16 CFR Part 260), the claim must reflect the entire finished package and the availability of recycling facilities to a substantial majority of consumers in the marketed region. Document substrate, adhesives, inks, and tape; mono-material paper construction is the simplest substantiation path.<\/p>\n<p><strong>Q5: Can I substitute 100% recycled liners without changing the dieline?<\/strong>Expect 8\u201312% lower ECT at equivalent grammage. Either increase liner grammage, step up the flute, or re-verify BCT with a 1.4 safety factor per ASTM D642 before release \u2014 never substitute silently on an open PO.<\/p>\n<section class=\"authority-references\" style=\"margin:24px 0;padding:16px 20px;background:#f8fafc;border-radius:6px;font-size:14px;\"><strong>References<\/strong><br \/>1. Sustainable Packaging Coalition (GreenBlue \/ SPC) \u2014 Design Guidance for Sustainable Packaging: <a href=\"https:\/\/sustainablepackaging.org\/\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/sustainablepackaging.org\/<\/a><br \/>2. ISO 14040:2006 &amp; ISO 14044:2006 \u2014 Life Cycle Assessment Principles and Framework \/ Requirements and Guidelines.<br \/>3. ASTM D642 \u2014 Standard Test Method for Determining Compressive Resistance of Shipping Containers; ASTM D4169 \u2014 Performance Testing of Shipping Containers and Systems.<br \/>4. TAPPI T810 (Mullen Burst), TAPPI T811 (Edgewise Compressive Strength); ISO 535 (Cobb Water Absorption); ISO 12048 (Compression &amp; Stacking).<br \/>5. ISTA 3A \u2014 General Simulation Performance Testing for Packaged-Products for Parcel Delivery System Shipment \u2264 70 lb.<br \/>6. EU Regulation 2024\/1991 (Packaging and Packaging Waste Regulation, PPWR); EU Directive 94\/62\/EC Annex II.<br \/>7. 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Validate specs with TadaPack tools.<\/p>\n","protected":false},"author":21,"featured_media":3892,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[],"class_list":["post-3893","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-materials-and-processes"],"_links":{"self":[{"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/posts\/3893","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\/21"}],"replies":[{"embeddable":true,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/comments?post=3893"}],"version-history":[{"count":0,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/posts\/3893\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/media\/3892"}],"wp:attachment":[{"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/media?parent=3893"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/categories?post=3893"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/tags?post=3893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}