{"id":370,"date":"2025-04-15T09:10:27","date_gmt":"2025-04-15T09:10:27","guid":{"rendered":"https:\/\/www.coefficientfriction.com\/?page_id=370"},"modified":"2025-04-16T01:45:55","modified_gmt":"2025-04-16T01:45:55","slug":"astm-d4917","status":"publish","type":"page","link":"https:\/\/www.coefficientfriction.com\/he\/astm-d4917","title":{"rendered":"ASTM D4917"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"370\" class=\"elementor elementor-370\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e87c6b2 e-flex e-con-boxed e-con e-parent\" data-id=\"e87c6b2\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-d087c52 e-con-full e-flex e-con e-child\" data-id=\"d087c52\" data-element_type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;none&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d9f31fd elementor-invisible elementor-widget elementor-widget-image\" data-id=\"d9f31fd\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"200\" src=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/04\/ASTM-D4197.webp\" class=\"attachment-large size-large wp-image-372\" alt=\"ASTM D4197\" srcset=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/04\/ASTM-D4197.webp 600w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/04\/ASTM-D4197-300x100.webp 300w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/04\/ASTM-D4197-18x6.webp 18w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-60fbb6b e-con-full e-flex e-con e-child\" data-id=\"60fbb6b\" data-element_type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;none&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0e3633c elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"0e3633c\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Test Method for Coefficient of Static and Kinetic Friction of the Horizontal Plane Method<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a73bac6 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"a73bac6\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"499\" data-end=\"1017\">Understanding the frictional behavior of paper is essential for ensuring optimal performance in printing, converting, and packaging operations. <strong data-start=\"643\" data-end=\"657\">ASTM D4917<\/strong> outlines a standardized procedure for measuring the <em data-start=\"710\" data-end=\"754\">coefficient of static and kinetic friction<\/em> of uncoated printing and writing paper, guiding quality control professionals in determining how paper interacts with itself or other materials under motion.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0364755 e-flex e-con-boxed e-con e-parent\" data-id=\"0364755\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f673fbc elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"f673fbc\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">ASTM D4917 Importance Paper Coefficient of Friction Test<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-156f03e elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"156f03e\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"1079\" data-end=\"1532\">ASTM D4917 provides a <strong data-start=\"1101\" data-end=\"1128\">horizontal plane method<\/strong> to evaluate the sliding resistance of paper, particularly <strong data-start=\"1187\" data-end=\"1206\">uncoated papers<\/strong>, under real-use conditions. The test is designed to simulate the forces acting on paper sheets during processes like <strong data-start=\"1324\" data-end=\"1373\">printing, feeding into copiers, and packaging<\/strong>. It ensures consistent <strong data-start=\"1397\" data-end=\"1427\">sheet-to-sheet interaction<\/strong>, helping manufacturers maintain <strong data-start=\"1460\" data-end=\"1504\">product integrity, machine compatibility<\/strong>, and end-user satisfaction.<\/p><p class=\"\" data-start=\"1534\" data-end=\"1860\">Frictional properties directly impact how easily paper sheets feed through equipment. Too low a COF may lead to double-feeding, while too high a COF can cause jams or misfeeds. ASTM D4917 addresses both <strong data-start=\"1737\" data-end=\"1771\">paper kinetic friction testing<\/strong> and <strong data-start=\"1776\" data-end=\"1809\">paper static friction testing<\/strong> with practical procedures and detailed guidelines.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-38e9bd9 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"38e9bd9\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">ASTM D4917 Coefficient of Friction Testing Procedure<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b4a43e8 e-con-full e-flex e-con e-child\" data-id=\"b4a43e8\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-949eee6 elementor-widget__width-inherit elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"949eee6\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInLeft&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"1914\" data-end=\"2019\">To conduct friction testing according to ASTM D4917, samples must be <strong data-start=\"1983\" data-end=\"2003\">cut and prepared<\/strong> with precision:<\/p><ul><li data-start=\"2023\" data-end=\"2149\">For <strong data-start=\"2027\" data-end=\"2052\">machine direction COF<\/strong>, specimens are cut with the grain direction aligned to the longer dimension (215 mm x 130 mm).<\/li><li data-start=\"2023\" data-end=\"2149\">For <strong data-start=\"2156\" data-end=\"2187\">cross-machine direction COF<\/strong>, the grain runs along the shorter side.<\/li><li data-start=\"2023\" data-end=\"2149\">Preconditioning and testing must be done in controlled environments, as defined in ASTM D685.<\/li><\/ul><p class=\"\" data-start=\"2327\" data-end=\"2654\">Specimens are arranged in pairs\u2014one mounted on a horizontal surface and the other attached to a <strong data-start=\"2423\" data-end=\"2431\">sled<\/strong>\u2014and tested using a <strong data-start=\"2451\" data-end=\"2489\">constant-rate-of-motion instrument<\/strong>. The <strong data-start=\"2495\" data-end=\"2509\">static COF<\/strong> is recorded as the force required to initiate motion, and the <strong data-start=\"2572\" data-end=\"2587\">kinetic COF<\/strong> as the average force during steady sliding over a 130 mm distance.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-768d61b e-con-full e-flex e-con e-child\" data-id=\"768d61b\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e43e1f1 elementor-widget__width-inherit elementor-invisible elementor-widget elementor-widget-video\" data-id=\"e43e1f1\" data-element_type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/youtu.be\\\/NUgXENOz8J0&quot;,&quot;autoplay&quot;:&quot;yes&quot;,&quot;play_on_mobile&quot;:&quot;yes&quot;,&quot;mute&quot;:&quot;yes&quot;,&quot;loop&quot;:&quot;yes&quot;,&quot;_animation&quot;:&quot;fadeInRight&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f5aa253 elementor-invisible elementor-widget elementor-widget-image\" data-id=\"f5aa253\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInRight&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.coefficientfriction.com\/he\/\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"600\" height=\"200\" src=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/ASTM-D1894-1.webp\" class=\"attachment-large size-large wp-image-77\" alt=\"ASTM D1894\" srcset=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/ASTM-D1894-1.webp 600w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/ASTM-D1894-1-300x100.webp 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9d958da e-flex e-con-boxed e-con e-parent\" data-id=\"9d958da\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5055911 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"5055911\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Paper Coefficient of Friction Test Method - Calculation<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7cac45b elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"7cac45b\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"2720\" data-end=\"2784\">ASTM D4917 specifies simple formulas for calculating COF values:<\/p><ul data-start=\"2786\" data-end=\"2915\"><li class=\"\" data-start=\"2786\" data-end=\"2852\"><p class=\"\" data-start=\"2788\" data-end=\"2852\"><strong data-start=\"2788\" data-end=\"2807\">Static COF (Us)<\/strong> = Force to initiate movement \/ Sled weight<\/p><\/li><li class=\"\" data-start=\"2853\" data-end=\"2915\"><p class=\"\" data-start=\"2855\" data-end=\"2915\"><strong data-start=\"2855\" data-end=\"2875\">Kinetic COF (Uk)<\/strong> = Average sliding force \/ Sled weight<\/p><\/li><\/ul><p class=\"\" data-start=\"2917\" data-end=\"3149\">Each result is typically averaged over five valid specimen pairs for statistical significance. The method ensures <strong data-start=\"3031\" data-end=\"3065\">repeatability and traceability<\/strong>, aligning with industry standards for <strong data-start=\"3104\" data-end=\"3125\">quality assurance<\/strong> in paper manufacturing.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f7a7ced e-flex e-con-boxed e-con e-parent\" data-id=\"f7a7ced\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2507506 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"2507506\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Applications <br><small>ASTM D4917 Paper Static and Kinetic Friction Testing<\/small><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d337fc7 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"d337fc7\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"3229\" data-end=\"3390\">The <strong data-start=\"3233\" data-end=\"3260\">printing paper COF test<\/strong> is essential in the paper and printing industry to evaluate <strong data-start=\"3321\" data-end=\"3367\">feedability, stackability, and runnability<\/strong>. Applications include:<\/p><ul data-start=\"3392\" data-end=\"3620\"><li class=\"\" data-start=\"3392\" data-end=\"3459\"><p class=\"\" data-start=\"3394\" data-end=\"3459\"><strong data-start=\"3394\" data-end=\"3424\">Uncoated paper COF testing<\/strong> for office and commercial printing<\/p><\/li><li class=\"\" data-start=\"3460\" data-end=\"3541\"><p class=\"\" data-start=\"3462\" data-end=\"3541\">Friction testing in <strong data-start=\"3482\" data-end=\"3498\">label papers<\/strong>, packaging materials, and corrugated board<\/p><\/li><li class=\"\" data-start=\"3542\" data-end=\"3620\"><p class=\"\" data-start=\"3544\" data-end=\"3620\">Evaluation of paper compatibility in <strong data-start=\"3581\" data-end=\"3620\">digital and offset printing presses<\/strong><\/p><\/li><\/ul><p class=\"\" data-start=\"3622\" data-end=\"3772\">Reliable COF measurements help manufacturers <strong data-start=\"3667\" data-end=\"3698\">optimize surface treatments<\/strong>, reduce <strong data-start=\"3707\" data-end=\"3733\">machine stoppage rates<\/strong>, and ensure <strong data-start=\"3746\" data-end=\"3771\">customer satisfaction<\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2456f1d e-flex e-con-boxed e-con e-parent\" data-id=\"2456f1d\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4be0d7a elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"4be0d7a\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Advanced Solutions for Paper Friction Testing<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0424cfa e-con-full e-grid e-con e-child\" data-id=\"0424cfa\" data-element_type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-3a3fc5c e-con-full e-flex e-con e-child\" data-id=\"3a3fc5c\" data-element_type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;none&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9e1f2e3 elementor-invisible elementor-widget elementor-widget-image\" data-id=\"9e1f2e3\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInLeft&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.coefficientfriction.com\/he\/\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/coefficient-of-friction-testing-equipment-01.webp\" class=\"attachment-medium_large size-medium_large wp-image-96\" alt=\"coefficient of friction testing equipment 01\" srcset=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/coefficient-of-friction-testing-equipment-01.webp 600w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/coefficient-of-friction-testing-equipment-01-300x300.webp 300w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/coefficient-of-friction-testing-equipment-01-150x150.webp 150w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/elementor\/thumbs\/coefficient-of-friction-testing-equipment-01-r3gmfg1nnljvgm1sgd9e374sfjg8cayrot70czv2xs.webp 400w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/elementor\/thumbs\/coefficient-of-friction-testing-equipment-01-r3gmfg1ovgcb2m7iva4k79z5gvnv026hkls6iecayw.webp 500w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/elementor\/thumbs\/coefficient-of-friction-testing-equipment-01-r3gmfg1nwdb5s7ojc5fmiewgn0ak2nlwv641l9yiy0.webp 420w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a290580 e-con-full e-flex e-con e-child\" data-id=\"a290580\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-41e1fbd elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"41e1fbd\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInRight&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"3779\" data-end=\"3850\"><strong data-start=\"3779\" data-end=\"3850\">Advanced Solutions for Friction Testing: COF-01 by Cell Instruments<\/strong><\/p><p class=\"\" data-start=\"3852\" data-end=\"4123\">To simplify ASTM <a href=\"https:\/\/www.astm.org\/d4917-97r07.html\" target=\"_blank\" rel=\"noopener nofollow\">D4917<\/a> compliance, <strong data-start=\"3887\" data-end=\"3907\">Cell Instruments<\/strong> offers the <a href=\"https:\/\/www.coefficientfriction.com\/he\/\"><strong data-start=\"3919\" data-end=\"3960\">COF-01 Coefficient of Friction Tester<\/strong><\/a>, engineered for precision and ease-of-use. The COF-01 supports both <strong data-start=\"4029\" data-end=\"4063\">static and kinetic COF testing<\/strong> in accordance with ASTM D4917 and other relevant standards.<\/p><p class=\"\" data-start=\"4125\" data-end=\"4162\"><strong data-start=\"4125\" data-end=\"4162\">Key advantages of COF-01 include:<\/strong><\/p><ul data-start=\"4164\" data-end=\"4493\"><li class=\"\" data-start=\"4164\" data-end=\"4212\"><p class=\"\" data-start=\"4166\" data-end=\"4212\">Fully automated movement and force detection<\/p><\/li><li class=\"\" data-start=\"4213\" data-end=\"4271\"><p class=\"\" data-start=\"4215\" data-end=\"4271\">High-precision load cell and real-time digital display<\/p><\/li><li class=\"\" data-start=\"4272\" data-end=\"4366\"><p class=\"\" data-start=\"4274\" data-end=\"4366\">Suitable for <strong data-start=\"4287\" data-end=\"4314\">printing paper COF test<\/strong>, <strong data-start=\"4316\" data-end=\"4343\">uncoated paper COF test<\/strong>, and other materials<\/p><\/li><li class=\"\" data-start=\"4367\" data-end=\"4422\"><p class=\"\" data-start=\"4369\" data-end=\"4422\">User-friendly interface with multi-language support<\/p><\/li><li class=\"\" data-start=\"4423\" data-end=\"4493\"><p class=\"\" data-start=\"4425\" data-end=\"4493\">Compatible with <strong data-start=\"4441\" data-end=\"4483\">data acquisition and report generation<\/strong> systems<\/p><\/li><\/ul><p class=\"\" data-start=\"4495\" data-end=\"4660\">For quality control personnel and lab technicians, COF-01 ensures <strong data-start=\"4561\" data-end=\"4603\">fast, accurate, and repeatable testing<\/strong>, helping paper producers stay compliant and competitive.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6d2c64c e-flex e-con-boxed e-con e-parent\" data-id=\"6d2c64c\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c394047 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"c394047\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">FAQs<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b484e06 elementor-invisible elementor-widget elementor-widget-n-accordion\" data-id=\"b484e06\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;max_items_expended&quot;:&quot;multiple&quot;,&quot;default_state&quot;:&quot;expanded&quot;,&quot;n_accordion_animation_duration&quot;:{&quot;unit&quot;:&quot;ms&quot;,&quot;size&quot;:400,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"e-n-accordion\" aria-label=\"Accordion. Open links with Enter or Space, close with Escape, and navigate with Arrow Keys\">\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1890\" class=\"e-n-accordion-item\" open>\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"1\" tabindex=\"0\" aria-expanded=\"true\" aria-controls=\"e-n-accordion-item-1890\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 1. What is the purpose of the ASTM D4917 standard? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1890\" class=\"elementor-element elementor-element-4dda86b e-con-full e-flex e-con e-child\" data-id=\"4dda86b\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b1ee56f elementor-widget elementor-widget-text-editor\" data-id=\"b1ee56f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"5774\" data-end=\"6068\">ASTM D4917 standardizes the procedure for measuring the static and kinetic coefficients of friction of paper, particularly uncoated printing and writing paper, to ensure consistent performance in applications like printing and packaging.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1891\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"2\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1891\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 2. How does the test method simulate real-world paper behavior? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1891\" class=\"elementor-element elementor-element-4213cd7 e-con-full e-flex e-con e-child\" data-id=\"4213cd7\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a5cb0ea elementor-widget elementor-widget-text-editor\" data-id=\"a5cb0ea\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"6070\" data-end=\"6333\">The horizontal plane method mimics the sliding of paper sheets during machine feeding and stacking, making it highly relevant for assessing frictional properties that affect real-use scenarios.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1892\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"3\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1892\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 3. Can ASTM D4917 be used for coated papers or specialty papers? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1892\" class=\"elementor-element elementor-element-8cbaf70 e-con-full e-flex e-con e-child\" data-id=\"8cbaf70\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ed707d2 elementor-widget elementor-widget-text-editor\" data-id=\"ed707d2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"6335\" data-end=\"6581\">While designed for uncoated papers, ASTM D4917 may be applied to other types with an understanding that results may vary in precision due to differences in surface properties.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1893\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"4\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1893\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 4. What\u2019s the difference between static and kinetic COF in paper testing? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1893\" class=\"elementor-element elementor-element-afe3920 e-flex e-con-boxed e-con e-child\" data-id=\"afe3920\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-932ab24 elementor-widget elementor-widget-text-editor\" data-id=\"932ab24\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"6583\" data-end=\"6846\">Static COF measures the resistance to initiating motion, while kinetic COF measures resistance during continued movement. Both are essential for understanding paper handling behavior.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1894\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"5\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1894\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 5. Difference between ASTM D4197 and ASTM D4198 <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1894\" class=\"elementor-element elementor-element-f438e49 e-flex e-con-boxed e-con e-child\" data-id=\"f438e49\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ae2370c elementor-widget elementor-widget-text-editor\" data-id=\"ae2370c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"4711\" data-end=\"5075\">Unlike alternative methods like <strong data-start=\"4743\" data-end=\"4781\">ASTM D4918 (inclined plane method)<\/strong>, ASTM D4917 provides <strong data-start=\"4803\" data-end=\"4832\">quantitative measurements<\/strong> of both static and kinetic friction, which are essential for understanding the complete sliding behavior of paper. The method is especially valuable for <strong data-start=\"4986\" data-end=\"5026\">uncoated writing and printing papers<\/strong>, where <strong data-start=\"5034\" data-end=\"5062\">uniform feed performance<\/strong> is critical.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Test Method for Coefficient of Static and Kinetic Friction of the Horizontal Plane Method Understanding the frictional behavior of paper is essential for ensuring optimal performance in printing, converting, and packaging operations. ASTM D4917 outlines a standardized procedure for measuring the coefficient of static and kinetic friction of uncoated printing and writing paper, guiding quality [&hellip;]<\/p>","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"footnotes":""},"class_list":["post-370","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.coefficientfriction.com\/he\/wp-json\/wp\/v2\/pages\/370","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.coefficientfriction.com\/he\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.coefficientfriction.com\/he\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.coefficientfriction.com\/he\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.coefficientfriction.com\/he\/wp-json\/wp\/v2\/comments?post=370"}],"version-history":[{"count":6,"href":"https:\/\/www.coefficientfriction.com\/he\/wp-json\/wp\/v2\/pages\/370\/revisions"}],"predecessor-version":[{"id":713,"href":"https:\/\/www.coefficientfriction.com\/he\/wp-json\/wp\/v2\/pages\/370\/revisions\/713"}],"wp:attachment":[{"href":"https:\/\/www.coefficientfriction.com\/he\/wp-json\/wp\/v2\/media?parent=370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}