{"id":21,"date":"2026-10-14T09:00:00","date_gmt":"2026-10-14T01:00:00","guid":{"rendered":"http:\/\/zen.loku.cn\/index.php\/2026\/10\/14\/gsm-is-not-a-fabric-specification\/"},"modified":"2026-10-14T09:00:00","modified_gmt":"2026-10-14T01:00:00","slug":"gsm-is-not-a-fabric-specification","status":"publish","type":"post","link":"https:\/\/zen.loku.cn\/index.php\/2026\/10\/14\/gsm-is-not-a-fabric-specification\/","title":{"rendered":"GSM is not a fabric specification"},"content":{"rendered":"<p class=\"article-lead\">&quot;320 gsm cotton fleece&quot; describes weight and nothing else. It says nothing about yarn count, loop structure, shrinkage, spirality, pilling or hand feel &#8211; all of which decide whether a garment survives a retail wash test.<\/p>\n<h2>What a real fabric spec contains<\/h2>\n<ul>\n<li>Composition with tolerance, e.g. 80% cotton \/ 20% recycled polyester \u00b13%.<\/li>\n<li>Construction: knit type, gauge, yarn count and whether the face is brushed.<\/li>\n<li>Finished GSM and the acceptable range, measured after finishing not greige.<\/li>\n<li>Dimensional stability: shrinkage after three domestic washes at 40\u00b0C.<\/li>\n<li>Colour fastness to washing, rubbing and light, with the test method named.<\/li>\n<li>Pilling grade and any anti-pilling or enzyme finish applied.<\/li>\n<\/ul>\n<h2>Why this matters for bulk<\/h2>\n<p>A mill can hit 320 gsm with a cheaper open-end yarn and a heavier brush. The sample looks right, the hand feel is close, and then the first wash twists the side seam by four centimetres. Re-cutting a 3,000-piece order is far more expensive than specifying the yarn at the start.<\/p>\n<blockquote><p>If the fabric spec has only one number on it, that number will be right and the garment will still be wrong.<\/p><\/blockquote>\n<p>For every program we issue a fabric sheet with the mill name, construction, test reports and approved lab-dip references. It becomes part of the sealed sample, so a repeat order six months later has something objective to be checked against.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Two 320 gsm fleece fabrics can behave completely differently after washing. Here is what we specify instead, and why it protects your bulk order.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[18,19,20],"class_list":["post-21","post","type-post","status-publish","format-standard","hentry","category-fabric-materials","tag-fabric","tag-gsm","tag-quality"],"_links":{"self":[{"href":"https:\/\/zen.loku.cn\/index.php\/wp-json\/wp\/v2\/posts\/21","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zen.loku.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zen.loku.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zen.loku.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zen.loku.cn\/index.php\/wp-json\/wp\/v2\/comments?post=21"}],"version-history":[{"count":0,"href":"https:\/\/zen.loku.cn\/index.php\/wp-json\/wp\/v2\/posts\/21\/revisions"}],"wp:attachment":[{"href":"https:\/\/zen.loku.cn\/index.php\/wp-json\/wp\/v2\/media?parent=21"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zen.loku.cn\/index.php\/wp-json\/wp\/v2\/categories?post=21"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zen.loku.cn\/index.php\/wp-json\/wp\/v2\/tags?post=21"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}