{"id":18612,"date":"2025-10-12T12:46:26","date_gmt":"2025-10-12T12:46:26","guid":{"rendered":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549-cof-of-paper-paperboard-with-the-horizontal-plane-method-discuss-the-specific-use-and-purpose-you-can-write-extensively-about-what-a-particular-astm-test-method-is-design\/"},"modified":"2025-10-19T18:37:25","modified_gmt":"2025-10-19T18:37:25","slug":"tappi-t-549","status":"publish","type":"post","link":"https:\/\/www.qualtechproductsindustry.com\/gd\/tappi-t-549\/","title":{"rendered":"TAPPI T 549 \u2014 COF P\u00e0ipeir is B\u00f2rd-p\u00e0ipeir: Cleachdadh, Adhbhar, agus L\u00e8irsinn Gn\u00ecomhachais"},"content":{"rendered":"<p>Nuair a dh\u2019fheumas tu tomhas d\u00e8 cho furasta \u2018s a shleamhnaicheas p\u00e0ipear no cairt-bh\u00f2rd an aghaidh uachdar, tha TAPPI T 549 a\u2019 toirt seachad an d\u00f2igh \u00e0bhaisteach gn\u00ecomhachais airson co-\u00e8ifeachd frithidh (COF) a dhearbhadh. Bidh an deuchainn seo a\u2019 cleachdadh an d\u00f2igh pl\u00e8ana ch\u00f2mhnard gus an fheachd a tha a dh\u00ecth gus aon stuth a ghluasad thairis air stuth eile aig astar cunbhalach a thomhas. Tha an deuchainn riatanach airson\u2026 <\/p>\n<div class=\"pmpro\">\n<div class=\"pmpro_card pmpro_content_message\">\n<h2 class=\"pmpro_card_title pmpro_font-large\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"24\" height=\"24\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"var(--pmpro--color--accent)\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"feather feather-lock\"><rect x=\"3\" y=\"11\" width=\"18\" height=\"11\" rx=\"2\" ry=\"2\"><\/rect><path d=\"M7 11V7a5 5 0 0 1 10 0v4\"><\/path><\/svg>Ballrachd Cruinneachadh Beachdan is L\u00e8irsinn riatanach<\/h2>\n<div class=\"pmpro_card_content\">\n<p> Feumaidh tu a bhith nad bhall de Chruinneachadh Insights &amp; Commentary gus faighinn chun t-susbaint seo.<\/p>\n<p><a class=\"pmpro_btn\" href=\"https:\/\/www.qualtechproductsindustry.com\/gd\/membership-checkout\/?pmpro_level=1\">Thig c\u00f2mhla a-nis<\/a><\/p>\n<\/div>\n<div class=\"pmpro_card_actions pmpro_font-medium\">A bheil thu nad bhall mu thr\u00e0th? <a href=\"https:\/\/www.qualtechproductsindustry.com\/gd\/login\/?redirect_to=https%3A%2F%2Fwww.qualtechproductsindustry.com%2Fgd%2Ftappi-t-549%2F\">Log a-steach an seo<\/a><\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>When you need to measure how easily paper or paperboard slides against surfaces, TAPPI T 549 provides the industry standard method for determining the coefficient of friction (COF). This test uses the horizontal plane method to measure the force needed to move one material across another at a constant speed. The test is essential for... <\/p>\n<div class=\"pmpro\"><div class=\"pmpro_card pmpro_content_message\"><h2 class=\"pmpro_card_title pmpro_font-large\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"24\" height=\"24\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"var(--pmpro--color--accent)\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"feather feather-lock\"><rect x=\"3\" y=\"11\" width=\"18\" height=\"11\" rx=\"2\" ry=\"2\"><\/rect><path d=\"M7 11V7a5 5 0 0 1 10 0v4\"><\/path><\/svg>Ballrachd Cruinneachadh Beachdan is L\u00e8irsinn riatanach<\/h2><div class=\"pmpro_card_content\"><p> Feumaidh tu a bhith nad bhall de Chruinneachadh Insights &amp; Commentary gus faighinn chun t-susbaint seo.<\/p><p><a class=\"pmpro_btn\" href=\"https:\/\/www.qualtechproductsindustry.com\/gd\/membership-checkout\/?pmpro_level=1\">Thig c\u00f2mhla a-nis<\/a><\/p><\/div><div class=\"pmpro_card_actions pmpro_font-medium\">A bheil thu nad bhall mu thr\u00e0th? <a href=\"https:\/\/www.qualtechproductsindustry.com\/gd\/login\/?redirect_to=https%3A%2F%2Fwww.qualtechproductsindustry.com%2Fgd%2Ftappi-t-549%2F\">Log a-steach an seo<\/a><\/div><\/div><\/div>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"pmpro_default_level":"","footnotes":""},"categories":[534,543],"tags":[],"class_list":["post-18612","post","type-post","status-publish","format-standard","hentry","category-science","category-tappi","pmpro-level-required","pmpro-level-1","pmpro-no-access"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>TAPPI T 549 \u2014 COF of Paper &amp; Paperboard: Use, Purpose, and Industry Insight - QUALTECH PRODUCTS INDUSTRY<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.qualtechproductsindustry.com\/gd\/tappi-t-549\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"TAPPI T 549 \u2014 COF of Paper &amp; Paperboard: Use, Purpose, and Industry Insight - QUALTECH PRODUCTS INDUSTRY\" \/>\n<meta property=\"og:description\" content=\"When you need to measure how easily paper or paperboard slides against surfaces, TAPPI T 549 provides the industry standard method for determining the coefficient of friction (COF). This test uses the horizontal plane method to measure the force needed to move one material across another at a constant speed. The test is essential for\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.qualtechproductsindustry.com\/gd\/tappi-t-549\/\" \/>\n<meta property=\"og:site_name\" content=\"QUALTECH PRODUCTS INDUSTRY\" \/>\n<meta property=\"article:published_time\" content=\"2025-10-12T12:46:26+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-19T18:37:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/koala.sh\/api\/image\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream\" \/>\n<meta name=\"author\" content=\"QUALTECH PRODUCTS INDUSTRY Science &amp; Research\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"QUALTECH PRODUCTS INDUSTRY Science &amp; Research\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"18 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/\"},\"author\":{\"name\":\"QUALTECH PRODUCTS INDUSTRY Science &amp; Research\",\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/#\\\/schema\\\/person\\\/f3d5d0194c89a77c5a600a2dff638d27\"},\"headline\":\"TAPPI T 549 \u2014 COF of Paper &#038; Paperboard: Use, Purpose, and Industry Insight\",\"datePublished\":\"2025-10-12T12:46:26+00:00\",\"dateModified\":\"2025-10-19T18:37:25+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/\"},\"wordCount\":3651,\"image\":{\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/koala.sh\\\/api\\\/image\\\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream\",\"articleSection\":[\"Science and Research\",\"TAPPI Test Standards\"],\"inLanguage\":\"gd\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/\",\"url\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/\",\"name\":\"TAPPI T 549 \u2014 COF of Paper & Paperboard: Use, Purpose, and Industry Insight - QUALTECH PRODUCTS INDUSTRY\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/koala.sh\\\/api\\\/image\\\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream\",\"datePublished\":\"2025-10-12T12:46:26+00:00\",\"dateModified\":\"2025-10-19T18:37:25+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/#\\\/schema\\\/person\\\/f3d5d0194c89a77c5a600a2dff638d27\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/#breadcrumb\"},\"inLanguage\":\"gd\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"gd\",\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/#primaryimage\",\"url\":\"https:\\\/\\\/koala.sh\\\/api\\\/image\\\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream\",\"contentUrl\":\"https:\\\/\\\/koala.sh\\\/api\\\/image\\\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/tappi-t-549\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"TAPPI T 549 \u2014 COF of Paper &#038; Paperboard: Use, Purpose, and Industry Insight\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/#website\",\"url\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/\",\"name\":\"QUALTECH PRODUCTS INDUSTRY\",\"description\":\"Precision Test Instruments &amp; Test Equipment &amp; Production Machinery for Research &amp; Quality Management &amp; Industrial Production\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"gd\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/#\\\/schema\\\/person\\\/f3d5d0194c89a77c5a600a2dff638d27\",\"name\":\"QUALTECH PRODUCTS INDUSTRY Science &amp; Research\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"gd\",\"@id\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/wp-content\\\/litespeed\\\/avatar\\\/1d2c6de4a1a94779b95d35e5b90c5a6f.jpg?ver=1786615055\",\"url\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/wp-content\\\/litespeed\\\/avatar\\\/1d2c6de4a1a94779b95d35e5b90c5a6f.jpg?ver=1786615055\",\"contentUrl\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/wp-content\\\/litespeed\\\/avatar\\\/1d2c6de4a1a94779b95d35e5b90c5a6f.jpg?ver=1786615055\",\"caption\":\"QUALTECH PRODUCTS INDUSTRY Science &amp; Research\"},\"sameAs\":[\"https:\\\/\\\/www.qualtechproductsindustry.com\"],\"url\":\"https:\\\/\\\/www.qualtechproductsindustry.com\\\/gd\\\/author\\\/888kaiqpirich888\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"TAPPI T 549 \u2014 COF P\u00e0ipeir is B\u00f2rd-p\u00e0ipeir: Cleachdadh, Adhbhar, agus L\u00e8irsinn Gn\u00ecomhachais - GN\u00ccOMHACHAS TORAIDHEAN QUALTECH","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.qualtechproductsindustry.com\/gd\/tappi-t-549\/","og_locale":"en_US","og_type":"article","og_title":"TAPPI T 549 \u2014 COF of Paper & Paperboard: Use, Purpose, and Industry Insight - QUALTECH PRODUCTS INDUSTRY","og_description":"When you need to measure how easily paper or paperboard slides against surfaces, TAPPI T 549 provides the industry standard method for determining the coefficient of friction (COF). This test uses the horizontal plane method to measure the force needed to move one material across another at a constant speed. The test is essential for","og_url":"https:\/\/www.qualtechproductsindustry.com\/gd\/tappi-t-549\/","og_site_name":"QUALTECH PRODUCTS INDUSTRY","article_published_time":"2025-10-12T12:46:26+00:00","article_modified_time":"2025-10-19T18:37:25+00:00","og_image":[{"url":"https:\/\/koala.sh\/api\/image\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream","type":"","width":"","height":""}],"author":"QUALTECH PRODUCTS INDUSTRY Science &amp; Research","twitter_card":"summary_large_image","twitter_misc":{"Written by":"QUALTECH PRODUCTS INDUSTRY Science &amp; Research","Est. reading time":"18 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/#article","isPartOf":{"@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/"},"author":{"name":"QUALTECH PRODUCTS INDUSTRY Science &amp; Research","@id":"https:\/\/www.qualtechproductsindustry.com\/#\/schema\/person\/f3d5d0194c89a77c5a600a2dff638d27"},"headline":"TAPPI T 549 \u2014 COF of Paper &#038; Paperboard: Use, Purpose, and Industry Insight","datePublished":"2025-10-12T12:46:26+00:00","dateModified":"2025-10-19T18:37:25+00:00","mainEntityOfPage":{"@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/"},"wordCount":3651,"image":{"@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/#primaryimage"},"thumbnailUrl":"https:\/\/koala.sh\/api\/image\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream","articleSection":["Science and Research","TAPPI Test Standards"],"inLanguage":"gd"},{"@type":"WebPage","@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/","url":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/","name":"TAPPI T 549 \u2014 COF P\u00e0ipeir is B\u00f2rd-p\u00e0ipeir: Cleachdadh, Adhbhar, agus L\u00e8irsinn Gn\u00ecomhachais - GN\u00ccOMHACHAS TORAIDHEAN QUALTECH","isPartOf":{"@id":"https:\/\/www.qualtechproductsindustry.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/#primaryimage"},"image":{"@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/#primaryimage"},"thumbnailUrl":"https:\/\/koala.sh\/api\/image\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream","datePublished":"2025-10-12T12:46:26+00:00","dateModified":"2025-10-19T18:37:25+00:00","author":{"@id":"https:\/\/www.qualtechproductsindustry.com\/#\/schema\/person\/f3d5d0194c89a77c5a600a2dff638d27"},"breadcrumb":{"@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/#breadcrumb"},"inLanguage":"gd","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/"]}]},{"@type":"ImageObject","inLanguage":"gd","@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/#primaryimage","url":"https:\/\/koala.sh\/api\/image\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream","contentUrl":"https:\/\/koala.sh\/api\/image\/v2-12hno0-0q9df.jpg?width=1216&#x26;height=832&#x26;dream"},{"@type":"BreadcrumbList","@id":"https:\/\/www.qualtechproductsindustry.com\/tappi-t-549\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.qualtechproductsindustry.com\/"},{"@type":"ListItem","position":2,"name":"TAPPI T 549 \u2014 COF of Paper &#038; Paperboard: Use, Purpose, and Industry Insight"}]},{"@type":"WebSite","@id":"https:\/\/www.qualtechproductsindustry.com\/#website","url":"https:\/\/www.qualtechproductsindustry.com\/","name":"Gn\u00ecomhachas Thoraidhean QUALTECH","description":"Ionnsramaidean Deuchainn Mionaideach &amp; Uidheam Deuchainn &amp; Innealan Riochdachaidh airson Rannsachadh &amp; Riaghladh C\u00e0ileachd &amp; Riochdachadh Gn\u00ecomhachais","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.qualtechproductsindustry.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"gd"},{"@type":"Person","@id":"https:\/\/www.qualtechproductsindustry.com\/#\/schema\/person\/f3d5d0194c89a77c5a600a2dff638d27","name":"GN\u00ccOMHACHAS TORAIDHEAN QUALTECH Saidheans &amp; Rannsachadh","image":{"@type":"ImageObject","inLanguage":"gd","@id":"https:\/\/www.qualtechproductsindustry.com\/wp-content\/litespeed\/avatar\/1d2c6de4a1a94779b95d35e5b90c5a6f.jpg?ver=1786615055","url":"https:\/\/www.qualtechproductsindustry.com\/wp-content\/litespeed\/avatar\/1d2c6de4a1a94779b95d35e5b90c5a6f.jpg?ver=1786615055","contentUrl":"https:\/\/www.qualtechproductsindustry.com\/wp-content\/litespeed\/avatar\/1d2c6de4a1a94779b95d35e5b90c5a6f.jpg?ver=1786615055","caption":"QUALTECH PRODUCTS INDUSTRY Science &amp; Research"},"sameAs":["https:\/\/www.qualtechproductsindustry.com"],"url":"https:\/\/www.qualtechproductsindustry.com\/gd\/author\/888kaiqpirich888\/"}]}},"_links":{"self":[{"href":"https:\/\/www.qualtechproductsindustry.com\/gd\/wp-json\/wp\/v2\/posts\/18612","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.qualtechproductsindustry.com\/gd\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.qualtechproductsindustry.com\/gd\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.qualtechproductsindustry.com\/gd\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.qualtechproductsindustry.com\/gd\/wp-json\/wp\/v2\/comments?post=18612"}],"version-history":[{"count":1,"href":"https:\/\/www.qualtechproductsindustry.com\/gd\/wp-json\/wp\/v2\/posts\/18612\/revisions"}],"predecessor-version":[{"id":18622,"href":"https:\/\/www.qualtechproductsindustry.com\/gd\/wp-json\/wp\/v2\/posts\/18612\/revisions\/18622"}],"wp:attachment":[{"href":"https:\/\/www.qualtechproductsindustry.com\/gd\/wp-json\/wp\/v2\/media?parent=18612"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.qualtechproductsindustry.com\/gd\/wp-json\/wp\/v2\/categories?post=18612"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.qualtechproductsindustry.com\/gd\/wp-json\/wp\/v2\/tags?post=18612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}