{"id":1132,"date":"2026-09-12T05:48:15","date_gmt":"2026-09-12T05:48:15","guid":{"rendered":"https:\/\/tadapack.com\/news\/kraft-paper-300-gsm\/"},"modified":"2026-09-12T05:48:15","modified_gmt":"2026-09-12T05:48:15","slug":"kraft-paper-300-gsm","status":"publish","type":"post","link":"https:\/\/tadapack.com\/news\/kraft-paper-300-gsm\/","title":{"rendered":"Kraft Paper 300 GSM: Specs, Strength &#038; B2B Buying 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>300 GSM kraft is a heavy-duty board-grade paper suited for mailers, bags, wrap, and structural inserts.<\/strong><\/li>\n<li style=\"margin-bottom:6px;\"><strong>Typical benchmarks: ~4.2\u20135.5 kN\/m tensile MD, 320\u2013450 kPa burst, high tear resistance.<\/strong><\/li>\n<li style=\"margin-bottom:6px;\"><strong>Virgin vs. recycled fiber changes strength ~20\u201330% at equal GSM.<\/strong><\/li>\n<li style=\"margin-bottom:6px;\"><strong>Unsized or water-based barrier coatings keep 300 GSM kraft mono-material recyclable under 2026 EPR schemes.<\/strong><\/li>\n<\/ul>\n<\/div>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem;'>Kraft Paper 300 GSM: Engineering Specs, Performance Benchmarks &#038; B2B Applications<\/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=\"kraft paper 300 gsm - 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;\">kraft paper 300 gsm &#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;\">Kraft paper 300 GSM sits at the boundary between heavy paper and light board. At 300 grams per square meter (~0.44 mm caliper for machine-finished kraft), it delivers the tear strength and puncture resistance that lighter 80\u2013150 GSM grades cannot, while remaining foldable, creasable, and far cheaper than corrugated laminates for flat-format applications. For procurement teams, it is the workhorse grade for premium mailers, industrial bags, void wrap, and rigid folded inserts.<\/p>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">This guide covers the mechanical specifications, fiber considerations, converting behavior, and 2026 compliance context that B2B buyers should verify before specifying the grade. For broader substrate comparisons, see our pillar hub on <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>.<\/p>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem; border-bottom:1px solid #e2e8f0; padding-bottom:8px;'>Mechanical Specifications of 300 GSM Kraft<\/h2>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Structural performance depends on fiber furnish (virgin softwood kraft vs. recycled), sizing, and machine direction. Test data should be requested per <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>, which govern burst (T 403), tensile (T 494), and ring crush (T 822) measurement. Typical benchmarks for a virgin unbleached 300 GSM kraft:<\/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;\">Property<\/th>\n<th style=\"border:1px solid #e2e8f0; padding:12px 16px; background:#f8fafc; color:#0f172a; font-weight:700; font-size:0.92rem;\">Virgin Kraft<\/th>\n<th style=\"border:1px solid #e2e8f0; padding:12px 16px; background:#f8fafc; color:#0f172a; font-weight:700; font-size:0.92rem;\">Recycled Kraft<\/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;\">Tensile MD (kN\/m)<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">4.2\u20135.5<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">3.2\u20134.2<\/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;\">Burst Index (kPa\u00b7m\u00b2\/g)<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">3.5\u20134.5<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">2.4\u20133.2<\/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;\">Caliper (mm)<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">0.40\u20130.48<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">0.42\u20130.52<\/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;\">Moisture content (%)<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">6\u20138<\/td>\n<td style=\"border:1px solid #e2e8f0; padding:12px 16px; color:#334155; font-size:0.9rem;\">6\u20138<\/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;\">Key takeaways for spec sheets: the 20\u201330% strength advantage of virgin long-fiber kraft matters most in load-bearing applications (handles, bag gussets, suspension wraps). Recycled 300 GSM remains fully adequate for void fill, interleaving, and light-duty mailers at a 10\u201318% lower unit cost.<\/p>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem; border-bottom:1px solid #e2e8f0; padding-bottom:8px;'>Convertability: Folding, Printing, and Creasing<\/h2>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">At 300 GSM, standard paper converting shifts toward board rules:<\/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;'>Creasing, not folding:<\/strong> Use a creasing matrix matched to caliper (rule height ~caliper + 0.3\u20130.4 mm). Sharpe folds without creasing rules will crack the surface fiber, especially in low-humidity environments below 40% RH.<\/li>\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>Die-cutting:<\/strong> Steel-rule dies with 2-pt cutters and ejection rubber perform well; hardness uniformity of the anvil cover determines cut cleanliness across long runs.<\/li>\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>Print systems:<\/strong> Unsized kraft is absorbent. Flexo with low-viscosity ink is the default industrial method\u2014our explainer on <a href=\"https:\/\/tadapack.com\/news\/what-is-flexo-ink\/\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color:#0284c7; text-decoration:underline; font-weight:600;\">What Is Flexo Ink? Flexographic Ink Systems Explained for B2B Buyers<\/a> covers anilox and viscosity setup for porous substrates. For higher graphics fidelity, <a href=\"https:\/\/tadapack.com\/news\/water-based-printing-ink-guide\/\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color:#0284c7; text-decoration:underline; font-weight:600;\">Water Based Printing Ink: B2B Specs, Performance &#038; Compliance<\/a> details how acrylic water-based systems meet food-contact and low-VOC requirements on kraft.<\/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;'>Barrier Coatings and Mono-Material Strategy<\/h2>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Standard 300 GSM kraft offers no moisture or grease barrier. Where protection is required, specify:<\/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;'>AKD\/ASA internal sizing<\/strong> \u2014 controls water absorption (Cobb60 < 30 g\/m\u00b2) without recyclability penalty.<\/li>\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>Aqueous dispersion coatings (PHA, PLA, or bio-wax)<\/strong> \u2014 8\u201315 g\/m\u00b2, provide grease resistance (kit rating 8\u201312) and short fiber-recovery compatibility.<\/li>\n<li style=\"margin-bottom:8px;\"><strong style='color:#0f172a;'>Avoid PE extrusion lamination<\/strong> if the sustainability claim matters: it moves the substrate out of the paper recycling stream and triggers plastic levies in many jurisdictions.<\/li>\n<\/ul>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Under EU PPWR (Regulation 2025\/40, applying from 2026 onward) and expanding EPR programs in North America, mono-material paper packaging attracts lower eco-modulated fees. A 300 GSM kraft mailer with an aqueous barrier coating qualifies as recyclable paper in most PRO fee schedules; the same mailer PE-laminated typically does not.<\/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 Structure and Sourcing Notes (2026)<\/h2>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">Indicative bulk pricing for 300 GSM kraft in 2026 runs $1,050\u2013$1,450 per metric ton (virgin, FOB mill) and $850\u2013$1,150 (recycled), with NBSK pulp price movements driving quarterly volatility. Specify FSC or PEFC chain-of-custody certification at PO stage\u2014most EPR schemes and retailer scorecards now require documented fiber origin. Order tolerance: request GSM tolerance \u00b14% and moisture spec 7% \u00b11% to keep converting consistency stable across shipments.<\/p>\n<h2 style='color:#0f172a; margin-top:36px; margin-bottom:16px; font-size:1.5rem; border-bottom:1px solid #e2e8f0; padding-bottom:8px;'>Specification Checklist for Buyers<\/h2>\n<ol style=\"margin:16px 0; padding-left:24px; line-height:1.75; color:#334155;\">\n<li style=\"margin-bottom:8px;\">Define tensile MD\/CD minimums per end use (bag vs. wrap vs. insert).<\/li>\n<li style=\"margin-bottom:8px;\">Require TAPPI-method burst and tear data in the mill cert, not just GSM.<\/li>\n<li style=\"margin-bottom:8px;\">Confirm barrier chemistry (sizing vs. coating) and its recycling classification.<\/li>\n<li style=\"margin-bottom:8px;\">Verify FSC\/PEFC chain-of-custody documentation.<\/li>\n<li style=\"margin-bottom:8px;\">Pilot-run creasing and die-cutting at your converter before committing tonnage.<\/li>\n<\/ol>\n<p style=\"margin:16px 0; line-height:1.8; color:#334155; font-size:1.02rem;\">300 GSM kraft is not a commodity you should buy on price per ton alone\u2014fiber furnish and barrier treatment decisions swing both performance and regulatory fee exposure by double-digit percentages.<\/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 300 GSM kraft paper used for?<\/h3>\n<p style=\"margin:0; color:#475569; font-size:0.95rem; line-height:1.65;\">Heavy-duty mailers, industrial sacks, premium shopping bags, void fill wrap, interleaving, and folded structural inserts where tear and puncture resistance exceed lighter 80\u2013200 GSM grades.<\/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 thick is 300 GSM kraft paper?<\/h3>\n<p style=\"margin:0; color:#475569; font-size:0.95rem; line-height:1.65;\">Approximately 0.40\u20130.48 mm caliper for virgin grades and 0.42\u20130.52 mm for recycled, depending on fiber furnish and finishing. Confirm caliper tolerance on the mill certificate.<\/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 300 GSM kraft paper recyclable?<\/h3>\n<p style=\"margin:0; color:#475569; font-size:0.95rem; line-height:1.65;\">Yes, if unsized with standard AKD sizing or coated with aqueous\/bio-based barriers. PE or foil lamination moves it out of the paper recycling stream and raises EPR fees under 2026 regulations.<\/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\/kraft-paper-300-gsm\/#article\",\n      \"headline\": \"Kraft Paper 300 GSM: Specs, Strength & B2B Buying Guide\",\n      \"description\": \"Kraft paper 300 GSM specs explained: tensile strength, bursting resistance, best uses, coating options, and 2026 compliance notes for B2B buyers.\",\n      \"mainEntityOfPage\": \"https:\/\/tadapack.com\/news\/kraft-paper-300-gsm\/\",\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\/kraft-paper-300-gsm\/#faq\",\n      \"mainEntity\": [{\"@type\":\"Question\",\"name\":\"What is 300 GSM kraft paper used for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Heavy-duty mailers, industrial sacks, premium shopping bags, void fill wrap, interleaving, and folded structural inserts where tear and puncture resistance exceed lighter 80\u2013200 GSM grades.\"}},{\"@type\":\"Question\",\"name\":\"How thick is 300 GSM kraft paper?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Approximately 0.40\u20130.48 mm caliper for virgin grades and 0.42\u20130.52 mm for recycled, depending on fiber furnish and finishing. 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