{"id":4699,"date":"2026-10-25T22:04:44","date_gmt":"2026-10-25T14:04:44","guid":{"rendered":"https:\/\/www.carbon-fiber-corp.com\/carbon-fiber-grade-tow-labels-t300-t700s\/"},"modified":"2026-10-25T22:04:44","modified_gmt":"2026-10-25T14:04:44","slug":"carbon-fiber-grade-tow-labels-t300-t700s","status":"publish","type":"post","link":"https:\/\/www.carbon-fiber-corp.com\/de\/carbon-fiber-grade-tow-labels-t300-t700s\/","title":{"rendered":"T300, T700S and 3K Carbon Fiber: Read the Grade and Tow Labels Separately"},"content":{"rendered":"<style>.ly-note{max-width:880px;margin:0 auto;color:#26333c;line-height:1.85;font-size:17px}.ly-note h2{font-size:1.5rem;line-height:1.35;margin:1.8em 0 .6em}.ly-note p{margin:0 0 1.2em}.ly-note .intro{font-size:1.08em}.ly-note figure{margin:2em 0}.ly-note figure img{display:block;width:100%;height:auto}.ly-note figcaption{font-size:.88rem;color:#60727d;line-height:1.55;margin-top:10px}.ly-note ul{padding-left:1.4em}.ly-note li{margin:.45em 0}.ly-note a{color:#8e1e34;text-decoration:underline;text-underline-offset:3px}.ly-note .notes{padding:20px 28px;background:#f0f4f5;border-left:3px solid #296c85;margin:2em 0}.ly-note .notes h2{font-size:1.1rem;margin:0 0 .8em}.ly-note .reading{border-top:1px solid #d9e1e5;margin-top:2em;padding-top:1.1em}.single-post .entry-title{font-size:clamp(1.8rem,3.8vw,2.6rem);line-height:1.25}.single-post .post-thumb-img-content img{width:100%;height:auto;max-height:360px;object-fit:contain;background:#fbfcfc}@media(max-width:600px){.ly-note{font-size:16px}.ly-note h2{font-size:1.3rem}.ly-note .notes{padding:17px}}<\/style><div class=\"ly-note\"><p class=\"intro\">A fiber grade and a tow designation describe different things. T300 or T700S identifies a particular manufacturer\u2019s fiber grade; a label such as 3K describes a filament count in a tow. Neither label is a complete specification for the finished laminate.<\/p><h2>Check the full material name<\/h2><p>Toray lists named carbon fiber grades and their available tow forms separately. Retain the manufacturer, complete grade designation and relevant product information when a material is proposed. Do not remove a suffix because another listing uses a shorter marketing name.<\/p><h2>Follow the material into the part<\/h2><p>The reinforcement may then become a fabric, tape or other intermediate product before it enters a laminate. Ask which product is actually being purchased and how it is used with the resin. A grade name on its own leaves the fabric construction and part layup unresolved.<\/p><h2>Compare the supplied construction<\/h2><p>If two quotes both say T700, ask for their precise material descriptions before comparing them. Equally, two fabrics carrying the same tow count need not contain the same fiber grade. Keep the sample\u2019s material definition with its inspection or test evidence. Manufacturer fiber data remains fiber data; it should not be relabelled as a measured property of an unidentified finished component.<\/p><figure><a href=\"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261025-b03-01-grade-2.webp\" aria-label=\"Open the full-size diagram\"><img src=\"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261025-b03-01-grade-2.webp\" alt=\"The identified fiber product is followed into the reinforcement and then into the defined laminate.\" width=\"1600\" height=\"1000\" loading=\"lazy\" decoding=\"async\"><\/a><figcaption>The identified fiber product is followed into the reinforcement and then into the defined laminate. <a href=\"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261025-b03-01-grade-2.webp\">View full size<\/a>.<\/figcaption><\/figure><aside class=\"notes\"><h2>For the drawing review<\/h2><ul><li>Manufacturer and full grade<\/li><li>Tow designation and reinforcement product<\/li><li>Resin and laminate construction<\/li><li>Evidence for the actual supplied part<\/li><\/ul><\/aside><p>Further reading: <a href=\"https:\/\/www.toraycma.com\/products\/carbon-fiber\/\">Toray CMA: carbon fiber grades and tow forms<\/a>.<\/p><div class=\"reading\"><p>Related: <a href=\"https:\/\/www.carbon-fiber-corp.com\/3k-carbon-fabric-areal-weight\/\">3K Carbon Fabric and Fabric Weight Describe Different Things<\/a> \u00b7 <a href=\"https:\/\/www.carbon-fiber-corp.com\/braided-carbon-sleeve-diameter-angle-length\/\">Braided Carbon Sleeves: Changing the Diameter Also Changes the Geometry<\/a>.<\/p><p><a href=\"https:\/\/www.carbon-fiber-corp.com\/contact\/\">Discuss your component with Litian Yunde<\/a> \u00b7 <a href=\"https:\/\/www.carbon-fiber-corp.com\/carbon-fiber-guides\/\">Browse the component guides<\/a><\/p><\/div><\/div><script type=\"application\/ld+json\" class=\"ly-article-schema\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BlogPosting\", \"@id\": \"https:\/\/www.carbon-fiber-corp.com\/carbon-fiber-grade-tow-labels-t300-t700s\/#article\", \"headline\": \"T300, T700S and 3K Carbon Fiber: Read the Grade and Tow Labels Separately\", \"description\": \"Distinguish carbon fiber grade names from tow filament counts. Retain the manufacturer, full designation and reinforcement construction in the material review.\", \"image\": [\"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261025-b03-01-grade-1.webp\", \"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261025-b03-01-grade-2.webp\"], \"datePublished\": \"2026-10-25T14:04:44Z\", \"mainEntityOfPage\": {\"@type\": \"WebPage\", \"@id\": \"https:\/\/www.carbon-fiber-corp.com\/carbon-fiber-grade-tow-labels-t300-t700s\/\"}, \"author\": {\"@type\": \"Organization\", \"name\": \"Litian Yunde\", \"url\": \"https:\/\/www.carbon-fiber-corp.com\/about\/\"}, \"publisher\": {\"@type\": \"Organization\", \"name\": \"Dongguan Litian Yunde New Materials Technology Co., Ltd.\", \"url\": \"https:\/\/www.carbon-fiber-corp.com\/\"}, \"inLanguage\": \"en\", \"articleSection\": \"Materials & Laminates\"}<\/script>","protected":false},"excerpt":{"rendered":"<p>A fiber grade and a tow designation describe different things. T300 or T700S identifies a particular manufacturer\u2019s fiber grade; a label such as 3K describes a filament count in a tow. Neither label is a complete specification for the finished laminate.<\/p>","protected":false},"author":1,"featured_media":4661,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"Carbon Fiber Grade and Tow Labels: T300, T700S, 3K | Litian Yunde","_seopress_titles_desc":"Distinguish carbon fiber grade names from tow filament counts. 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T300 or T700S identifies a particular manufacturer\u2019s fiber grade; a label such as 3K describes a filament count in a tow. 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