{"id":851,"date":"2026-09-10T07:42:21","date_gmt":"2026-09-10T07:42:21","guid":{"rendered":"https:\/\/tadapack.com\/news\/ista-3a-2020-parcel-test-guide\/"},"modified":"2026-09-10T07:42:21","modified_gmt":"2026-09-10T07:42:21","slug":"ista-3a-2020-parcel-test-guide","status":"publish","type":"post","link":"https:\/\/tadapack.com\/news\/ista-3a-2020-parcel-test-guide\/","title":{"rendered":"ISTA 3A-2020: Parcel Drop Test Protocol Engineer&#8217;s 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>ISTA 3A-2020 is a general-simulation performance test for single parcels shipped through a parcel delivery system, covering drops, vibration, compression, and atmospheric conditioning.<\/strong><\/li>\n<li style=\"margin-bottom:6px;\"><strong>It differs from 1A\/2A by simulating real carrier hazard sequences rather than applying fixed generic inputs.<\/strong><\/li>\n<li style=\"margin-bottom:6px;\"><strong>Pass criteria require no product damage, no pack failure, and documented weight\/condition records per run.<\/strong><\/li>\n<li style=\"margin-bottom:6px;\"><strong>Testing to 3A-2020 reduces damage claims, right-sizes material spend, and supports EPR data documentation in 2026 supply chains.<\/strong><\/li>\n<\/ul>\n<\/div>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem;'>ISTA 3A-2020: The Engineer&#8217;s Guide to Parcel Simulation Testing<\/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-1542601906990-b4d3fb778b09?auto=format&#038;fit=crow=1200&#038;q=80\" alt=\"ista 3a-2020 - Eco-Friendly Sustainable Packaging and Circular Economy Compliance (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;\">ista 3a-2020 &#8211; Eco-Friendly Sustainable Packaging and Circular Economy Compliance (TadaPack Engineering Guide)<\/p>\n<\/div>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">ISTA 3A-2020 is the International Safe Transit Association&#8217;s general-simulation performance test standard for individual packaged products shipped through a <strong style='color:#0f172a;'>parcel delivery system<\/strong> (\u2264 70 lb \/ 31.5 kg for standard parcels, with expanded categories up to 150 lb). Unlike the fixed-input Series 1 tests, 3A models actual parcel-network hazards \u2014 random vibration, rotational edge drops, concentrated impacts, and low-pressure exposure \u2014 making it the de facto benchmark for e-commerce packaging validation in 2026.<\/p>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">For engineers building <a href=\"https:\/\/tadapack.com\/news\/compliance-and-marketing\/\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color:#0284c7; text-decoration:underline; font-weight:600;\">Global Compliance &#038; Marketing<\/a> documentation, 3A-2020 results are frequently requested by retailers, 3PLs, and marketplaces before SKU onboarding.<\/p>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem; border-bottom:1px solid #e2e8f0; padding-bottom:8px;'>Why 3A-2020 Over 1A or 2A?<\/h2>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">The distinction matters for test budget and legal defensibility:<\/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;'>ISTA 1A<\/strong> \u2014 non-simulation integrity test: fixed drop heights and stacked vibration. Cheap, but weak predictive value.<\/li>\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>ISTA 2A<\/strong> \u2014 partial simulation: adds atmospheric conditioning and compression to 1A elements.<\/li>\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>ISTA 3A-2020<\/strong> \u2014 general simulation: hazard-aligned sequence replicating UPS\/FedEx\/USPS network profiles, including a 4-corner rotational drop and random vibration on a power spectral density (PSD) profile.<\/li>\n<\/ul>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Retailer vendor manuals (Amazon SIPP, Walmart, Home Depot) typically reference 3A-family protocols, so passing 3A-2020 consolidates multiple compliance requirements into one lab run.<\/p>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem; border-bottom:1px solid #e2e8f0; padding-bottom:8px;'>ISTA 3A-2020 Test Sequence Breakdown<\/h2>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">The standard is organized by package type (Standard, Small, Flat, Elongated). Each follows this core sequence:<\/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;'>Atmospheric preconditioning<\/strong> \u2014 minimum 12 hours at 23\u00b0C \/ 50% RH per <a href=\"https:\/\/www.astm.org\/d4332-22.html\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color:#0284c7; text-decoration:underline; font-weight:600;\">ASTM D4332<\/a> conditioning containers or chambers; optional frozen\/thawed profiles for cold-chain SKUs.<\/li>\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>Shock \u2014 rotational flat drop<\/strong> \u2014 drops assigned by package weight class, from 230 mm (heavy) up to 910 mm (light parcels) onto 2-inch honeycomb or concrete.<\/li>\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>Vibration \u2014 random with repeats<\/strong> \u2014 PSD-tracked truck profile, typically 0.52 Grms overall for top-and-load sections, with a mid-test package rotation.<\/li>\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>Shock \u2014 rotational edge\/corner drops<\/strong> \u2014 4-point sequence per 3A-2020 figures.<\/li>\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>Low pressure (optional)<\/strong> \u2014 simulated air transport at 4,267 m equivalent altitude for parcels routed via air hubs.<\/li>\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>Compression (apply only if warehouse stacking is claimed)<\/strong> \u2014 machine compression to calculated load, not dead-weight crush.<\/li>\n<\/ol>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem; border-bottom:1px solid #e2e8f0; padding-bottom:8px;'>Specifying Corrugated to Survive 3A-2020<\/h2>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Most 3A failures trace back to under-specified corrugated board and insufficient internal void management. Engineer to these 2026 benchmarks:<\/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;\">Board<\/th>\n<th style=\"border:1px solid #e2e8f0; padding:12px 16px; background:#f8fafc; color:#0f172a; font-weight:700; font-size:0.92rem;\">ECT Rating<\/th>\n<th style=\"border:1px solid #e2e8f0; padding:12px 16px; background:#f8fafc; color:#0f172a; font-weight:700; font-size:0.92rem;\">Typical Use<\/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;\">B-flute (3.0 mm)<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">32 lb\/in<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">Small parcel, void fill<\/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;\">C-flute (4.0 mm)<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">32\u201344 lb\/in<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">Standard e-commerce shipper<\/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;\">BC double-wall (7.0 mm)<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">48\u201351 lb\/in<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">Heavy or fragile, elongated<\/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;\">E-flute (1.5 mm)<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">25\u201330 lb\/in<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">Flat litho-laminated parcels<\/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;\">Pair board selection with Mullen burst ratings (200T \u2013 275T single wall) when retailers specify both metrics. Right-sizing here also lowers material GSM per unit \u2014 a direct input when you <a href=\"https:\/\/tadapack.com\/news\/report-packaging-data-epr-compliance-guide\/\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color:#0284c7; text-decoration:underline; font-weight:600;\">report packaging data for EPR<\/a>, since tonnage-based fees scale with board weight.<\/p>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem; border-bottom:1px solid #e2e8f0; padding-bottom:8px;'>Documentation and Pass\/Fail Criteria<\/h2>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">A valid 3A-2020 report must record:<\/p>\n<ul style=\"margin:16px 0; padding-left:24px; line-height:1.75; color:#334155;\">\n<li style=\"margin-bottom:8px;\">Package dimensions, weight, and board grade before and after test<\/li>\n<li style=\"margin-bottom:8px;\">Ambient\/conditioning data with tolerance bands<\/li>\n<li style=\"margin-bottom:8px;\">Drop heights, impact orientation, and sequence photos<\/li>\n<li style=\"margin-bottom:8px;\">Product functional check results post-sequence<\/li>\n<\/ul>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\"><strong style='color:#0f172a;'>Pass<\/strong> = no product damage, no packaging failure compromising containment, no hazardous material release. One damaged unit fails the run; you must retest with corrective structural changes.<\/p>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem; border-bottom:1px solid #e2e8f0; padding-bottom:8px;'>Linking 3A Testing to EPR and PPWR Compliance<\/h2>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Durability testing and sustainability regulation now intersect. Under the <a href=\"https:\/\/environment.ec.europa.eu\/topics\/waste-and-recycling\/packaging-waste_en\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color:#0284c7; text-decoration:underline; font-weight:600;\">EU Packaging and Packaging Waste Regulation (PPWR)<\/a>, recyclability grading, recycled-content minimums, and packaging-weight minimization requirements phase in through 2030. Testing to 3A-2020 provides objective evidence that material reduction (downgauged flutes, fewer void fillers, right-sized cartons) does not compromise product protection \u2014 the core engineering defense against &#8220;overpackaging&#8221; findings. Engineers scoping which SKU formats fall under fee modulation should review <a href=\"https:\/\/tadapack.com\/news\/what-packaging-is-included-in-epr\/\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color:#0284c7; text-decoration:underline; font-weight:600;\">what packaging is included in EPR<\/a> before finalizing board specifications.<\/p>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem; border-bottom:1px solid #e2e8f0; padding-bottom:8px;'>Cost-Benefit for B2B Shippers<\/h2>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Typical 3A-2020 lab runs cost $600\u2013$1,500 per SKU at ISTA-certified labs, with 3\u20135 day turnaround. Against this:<\/p>\n<ul style=\"margin:16px 0; padding-left:24px; line-height:1.75; color:#334155;\">\n<li style=\"margin-bottom:8px;\">Parcel damage claims average 1.5\u20133% of e-commerce revenue; validated packaging typically cuts this by 40\u201360%.<\/li>\n<li style=\"margin-bottom:8px;\">Right-sizing after first-round failures reduces corrugated spend 8\u201315% per SKU annually.<\/li>\n<li style=\"margin-bottom:8px;\">Retailer onboarding delays shrink when pre-validated 3A reports accompany vendor submissions.<\/li>\n<\/ul>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem; border-bottom:1px solid #e2e8f0; padding-bottom:8px;'>Engineering Recommendations<\/h2>\n<ol style=\"margin:16px 0; padding-left:24px; line-height:1.75; color:#334155;\">\n<li style=\"margin-bottom:8px;\">Test at <strong style='color:#0f172a;'>worst-case<\/strong> ship weight and dimensions, not nominal.<\/li>\n<li style=\"margin-bottom:8px;\">Condition packaging at 50% RH minimum \u2014 fiberboard loses 20\u201330% ECT strength at high humidity.<\/li>\n<li style=\"margin-bottom:8px;\">Revalidate after any structural change: flute substitution, closure redesign, or internal fitment swap.<\/li>\n<li style=\"margin-bottom:8px;\">Archive reports with photos and instrument calibration records for 5+ years to support retailer audits and EPR documentation.<\/li>\n<\/ol>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">ISTA 3A-2020 is not a formality \u2014 it is the engineering control that converts material savings and regulatory compliance into verified, defensible parcel performance.<\/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 is the difference between ISTA 3A-2020 and ISTA 1A?<\/h3>\n<p style=\"margin:0; color:#475569; font-size:0.95rem; line-height:1.65;\">ISTA 1A is a non-simulation integrity test using fixed generic drop and vibration inputs. ISTA 3A-2020 is a general-simulation test that replicates actual parcel-network hazards \u2014 random vibration profiles, rotational edge and corner drops, and atmospheric conditioning \u2014 providing far stronger predictive value for e-commerce shipments.<\/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;\">How much does ISTA 3A-2020 testing cost?<\/h3>\n<p style=\"margin:0; color:#475569; font-size:0.95rem; line-height:1.65;\">Typical 3A-2020 testing at an ISTA-certified laboratory costs $600\u2013$1,500 per SKU with 3\u20135 day turnaround, depending on package size, required atmospheric profiles, and whether compression and low-pressure (air transport) sequences are included.<\/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;\">What corrugated board should I use to pass ISTA 3A-2020?<\/h3>\n<p style=\"margin:0; color:#475569; font-size:0.95rem; line-height:1.65;\">Most standard parcels (under 70 lb) pass with C-flute (4.0 mm) at 32\u201344 lb\/in ECT or BC double-wall (7.0 mm) at 48\u201351 lb\/in ECT for heavier or fragile goods. Always test at worst-case ship weight and condition packaging at 23\u00b0C \/ 50% RH, since high humidity reduces fiberboard ECT strength by 20\u201330%.<\/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\/ista-3a-2020-parcel-test-guide\/#article\",\n      \"headline\": \"ISTA 3A-2020: Parcel Drop Test Protocol Engineer's Guide\",\n      \"description\": \"ISTA 3A-2020 decoded: test sequences, drop heights, atmospheric conditioning, and pass criteria for parcel-delivery packaging engineering.\",\n      \"mainEntityOfPage\": \"https:\/\/tadapack.com\/news\/ista-3a-2020-parcel-test-guide\/\",\n      \"author\": {\n        \"@type\": \"Person\",\n        \"name\": \"Carlos Mendoza\",\n        \"jobTitle\": \"Anti-Greenwashing Claims & ESG Reporting Auditor\",\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\/ista-3a-2020-parcel-test-guide\/#faq\",\n      \"mainEntity\": [{\"@type\":\"Question\",\"name\":\"What is the difference between ISTA 3A-2020 and ISTA 1A?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"ISTA 1A is a non-simulation integrity test using fixed generic drop and vibration inputs. ISTA 3A-2020 is a general-simulation test that replicates actual parcel-network hazards \u2014 random vibration profiles, rotational edge and corner drops, and atmospheric conditioning \u2014 providing far stronger predictive value for e-commerce shipments.\"}},{\"@type\":\"Question\",\"name\":\"How much does ISTA 3A-2020 testing cost?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Typical 3A-2020 testing at an ISTA-certified laboratory costs $600\u2013$1,500 per SKU with 3\u20135 day turnaround, depending on package size, required atmospheric profiles, and whether compression and low-pressure (air transport) sequences are included.\"}},{\"@type\":\"Question\",\"name\":\"What corrugated board should I use to pass ISTA 3A-2020?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most standard parcels (under 70 lb) pass with C-flute (4.0 mm) at 32\u201344 lb\/in ECT or BC double-wall (7.0 mm) at 48\u201351 lb\/in ECT for heavier or fragile goods. Always test at worst-case ship weight and condition packaging at 23\u00b0C \/ 50% RH, since high humidity reduces fiberboard ECT strength by 20\u201330%.\"}}]\n    }\n  ]\n}\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>ISTA 3A-2020 decoded: test sequences, drop heights, atmospheric conditioning, and pass criteria for parcel-delivery packaging engineering.<\/p>\n","protected":false},"author":23,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[406,412,411],"class_list":["post-851","post","type-post","status-publish","format-standard","hentry","category-compliance-and-marketing","tag-corrugated-flutes","tag-epr-packaging","tag-ista-testing"],"_links":{"self":[{"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/posts\/851","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\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/comments?post=851"}],"version-history":[{"count":0,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/posts\/851\/revisions"}],"wp:attachment":[{"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/media?parent=851"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/categories?post=851"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/tags?post=851"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}