{"id":4409,"date":"2025-12-16T06:50:55","date_gmt":"2025-12-16T06:50:55","guid":{"rendered":"https:\/\/roadskymarking.com\/?p=4409"},"modified":"2025-12-16T06:50:59","modified_gmt":"2025-12-16T06:50:59","slug":"how-glass-beads-are-spread-in-road-marking","status":"publish","type":"post","link":"https:\/\/roadskymarking.com\/fr\/how-glass-beads-are-spread-in-road-marking.html","title":{"rendered":"Comment les billes de verre sont r\u00e9parties dans le marquage routier"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table des mati\u00e8res<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table des mati\u00e8res\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/roadskymarking.com\/fr\/how-glass-beads-are-spread-in-road-marking.html\/#What_Are_Glass_Beads_in_Road_Marking\" >Que sont les billes de verre utilis\u00e9es dans le marquage routier ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/roadskymarking.com\/fr\/how-glass-beads-are-spread-in-road-marking.html\/#Why_Proper_Glass_Bead_Spreading_Matters\" >Pourquoi il est important de bien r\u00e9partir les billes de verre<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/roadskymarking.com\/fr\/how-glass-beads-are-spread-in-road-marking.html\/#Main_Methods_of_Spreading_Glass_Beads\" >Principales m\u00e9thodes de dispersion des billes de verre<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/roadskymarking.com\/fr\/how-glass-beads-are-spread-in-road-marking.html\/#1_Drop-On_Method_Most_Common\" >1. M\u00e9thode Drop-On (la plus courante)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/roadskymarking.com\/fr\/how-glass-beads-are-spread-in-road-marking.html\/#2_Premix_Method\" >2. M\u00e9thode de pr\u00e9m\u00e9lange<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/roadskymarking.com\/fr\/how-glass-beads-are-spread-in-road-marking.html\/#3_Combined_Drop-On_and_Premix_Application\" >3. Application combin\u00e9e Drop-On et Premix<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/roadskymarking.com\/fr\/how-glass-beads-are-spread-in-road-marking.html\/#Equipment_Used_for_Spreading_Glass_Beads\" >\u00c9quipement utilis\u00e9 pour l'\u00e9pandage de billes de verre<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/roadskymarking.com\/fr\/how-glass-beads-are-spread-in-road-marking.html\/#1_Automatic_Bead_Dispensers\" >1. Distributeurs automatiques de billes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/roadskymarking.com\/fr\/how-glass-beads-are-spread-in-road-marking.html\/#2_Manual_Bead_Spreaders\" >2. \u00c9pandeurs manuels de billes<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/roadskymarking.com\/fr\/how-glass-beads-are-spread-in-road-marking.html\/#Timing_of_Glass_Bead_Application\" >Moment d'application des billes de verre<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/roadskymarking.com\/fr\/how-glass-beads-are-spread-in-road-marking.html\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n\n<p><strong><a style=\"text-decoration: underline;\" href=\"https:\/\/roadskymarking.com\/fr\/glass-beads.html\/\" target=\"_blank\" rel=\"noreferrer noopener\">Perles de verre<\/a><\/strong> jouer un r\u00f4le essentiel dans <strong><a href=\"https:\/\/roadskymarking.com\/fr\/\" target=\"_blank\" rel=\"noreferrer noopener\" style=\"text-decoration: underline;\">syst\u00e8mes de marquage routier<\/a><\/strong>, am\u00e9liorant consid\u00e9rablement la visibilit\u00e9 nocturne et la s\u00e9curit\u00e9 routi\u00e8re globale. Comprendre comment les billes de verre sont r\u00e9parties dans le marquage routier aide les autorit\u00e9s routi\u00e8res, les entrepreneurs et les ing\u00e9nieurs \u00e0 obtenir une r\u00e9tror\u00e9flectivit\u00e9 optimale et des marquages routiers durables.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/roadskymarking.com\/wp-content\/uploads\/2025\/12\/Glass-Beads-in-Road-Marking.jpg\" alt=\"Billes de verre dans le marquage routier\" class=\"wp-image-4410\"\/><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Are_Glass_Beads_in_Road_Marking\"><\/span>Que sont les billes de verre utilis\u00e9es dans le marquage routier ?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Les billes de verre sont de petites particules sph\u00e9riques fabriqu\u00e9es \u00e0 partir de verre recycl\u00e9 ou vierge. Lorsqu'elles sont int\u00e9gr\u00e9es dans <strong><a href=\"https:\/\/roadskymarking.com\/fr\/road-marking-paint\/\" target=\"_blank\" rel=\"noreferrer noopener\" style=\"text-decoration: underline;\">peinture de marquage routier<\/a><\/strong> ou <strong><a href=\"https:\/\/roadskymarking.com\/fr\/thermoplastic-road-marking-paint.html\/\" target=\"_blank\" rel=\"noreferrer noopener\" style=\"text-decoration: underline;\">mat\u00e9riaux thermoplastiques<\/a><\/strong>, ils renvoient les phares des v\u00e9hicules vers les conducteurs. L'efficacit\u00e9 de cette r\u00e9flexion est g\u00e9n\u00e9ralement mesur\u00e9e en valeurs RL \u00e0 l'aide d'un <strong><a href=\"https:\/\/roadskymarking.com\/fr\/retroreflectometer\/\" target=\"_blank\" rel=\"noreferrer noopener\" style=\"text-decoration: underline;\">R\u00e9tror\u00e9flectom\u00e8tre<\/a><\/strong>, qui est un instrument de test standard dans le domaine de l'ing\u00e9nierie de la s\u00e9curit\u00e9 routi\u00e8re.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Proper_Glass_Bead_Spreading_Matters\"><\/span>Pourquoi il est important de bien r\u00e9partir les billes de verre<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>La r\u00e9partition correcte des billes de verre a une incidence directe sur :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Performances de r\u00e9tror\u00e9flectivit\u00e9<\/li>\n\n\n\n<li>Durabilit\u00e9 des marquages routiers<\/li>\n\n\n\n<li>Respect des normes de s\u00e9curit\u00e9 routi\u00e8re<\/li>\n\n\n\n<li>Visibilit\u00e9 du conducteur sous la pluie et dans l'obscurit\u00e9<\/li>\n<\/ul>\n\n\n\n<p>Une r\u00e9partition incorrecte peut entra\u00eener une mauvaise r\u00e9flexion, une perte pr\u00e9matur\u00e9e des billes ou une qualit\u00e9 de marquage in\u00e9gale.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Main_Methods_of_Spreading_Glass_Beads\"><\/span>Principales m\u00e9thodes de dispersion des billes de verre<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Drop-On_Method_Most_Common\"><\/span>1. M\u00e9thode Drop-On (la plus courante)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>La m\u00e9thode par saupoudrage est la technique la plus couramment utilis\u00e9e. Les billes de verre sont appliqu\u00e9es imm\u00e9diatement apr\u00e8s la pulv\u00e9risation ou l'extrusion du mat\u00e9riau de marquage routier.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Comment cela fonctionne-t-il ?<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>De la peinture ou du thermoplastique est appliqu\u00e9 sur la chauss\u00e9e pour r\u00e9aliser le marquage routier.<\/li>\n\n\n\n<li>Tandis que le mat\u00e9riau est encore humide ou fondu, des billes de verre sont d\u00e9pos\u00e9es sur la surface.<\/li>\n\n\n\n<li>Les billes s'incrustent partiellement dans le marquage, garantissant une forte adh\u00e9rence et une r\u00e9flexion optimale.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">Avantages :<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Haute r\u00e9tror\u00e9flectivit\u00e9<\/li>\n\n\n\n<li>Taux de perles facile \u00e0 contr\u00f4ler<\/li>\n\n\n\n<li>Compatible avec la plupart des mat\u00e9riaux de marquage routier<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Premix_Method\"><\/span>2. M\u00e9thode de pr\u00e9m\u00e9lange<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Dans la m\u00e9thode de pr\u00e9m\u00e9lange, les billes de verre sont m\u00e9lang\u00e9es directement au mat\u00e9riau de marquage routier avant son application.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Comment cela fonctionne-t-il ?<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Les billes de verre sont m\u00e9lang\u00e9es \u00e0 l'avance \u00e0 la peinture ou au thermoplastique.<\/li>\n\n\n\n<li>Le m\u00e9lange est appliqu\u00e9 sur la surface de la route.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">Avantages :<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>R\u00e9flectivit\u00e9 \u00e0 long terme<\/li>\n\n\n\n<li>R\u00e9duction de la perte de billes<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Combined_Drop-On_and_Premix_Application\"><\/span>3. Application combin\u00e9e Drop-On et Premix<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Pour les marquages routiers haute performance, les entrepreneurs utilisent souvent \u00e0 la fois des billes de verre pr\u00e9m\u00e9lang\u00e9es et des billes de verre \u00e0 saupoudrer.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Les avantages comprennent :<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>R\u00e9flectivit\u00e9 imm\u00e9diate apr\u00e8s application<\/li>\n\n\n\n<li>R\u00e9flectivit\u00e9 maintenue tout au long de la dur\u00e9e de vie du marquage<\/li>\n\n\n\n<li>Meilleure conformit\u00e9 aux normes internationales<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/roadskymarking.com\/wp-content\/uploads\/2025\/12\/Equipment-Used-for-Spreading-Glass-Beads.jpg\" alt=\"\u00c9quipement utilis\u00e9 pour l&#039;\u00e9pandage de billes de verre\" class=\"wp-image-4412\"\/><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Equipment_Used_for_Spreading_Glass_Beads\"><\/span>\u00c9quipement utilis\u00e9 pour l'\u00e9pandage de billes de verre<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Automatic_Bead_Dispensers\"><\/span>1. Distributeurs automatiques de billes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>La plupart <strong><a href=\"https:\/\/roadskymarking.com\/fr\/road-marking-machines\/\" target=\"_blank\" rel=\"noreferrer noopener\" style=\"text-decoration: underline;\">machines de marquage routier<\/a><\/strong> sont \u00e9quip\u00e9s d'un syst\u00e8me automatique <strong><a href=\"https:\/\/roadskymarking.com\/fr\/glass-beads-dispenser.html\/\" target=\"_blank\" rel=\"noreferrer noopener\" style=\"text-decoration: underline;\">distributeurs de billes de verre<\/a><\/strong> qui garantissent une distribution uniforme.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Caract\u00e9ristiques principales :<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>D\u00e9bit r\u00e9glable (g\/m\u00b2)<\/li>\n\n\n\n<li>Fonctionnement synchronis\u00e9 avec la pulv\u00e9risation de peinture<\/li>\n\n\n\n<li>Couverture uniforme des billes sur toute la largeur de marquage<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Manual_Bead_Spreaders\"><\/span>2. \u00c9pandeurs manuels de billes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Pour les projets \u00e0 petite \u00e9chelle ou les travaux de retouche, on utilise des spatules manuelles.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Limitations :<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Couverture moins uniforme<\/li>\n\n\n\n<li>Risque accru de r\u00e9flectivit\u00e9 in\u00e9gale<\/li>\n\n\n\n<li>Convient principalement aux marquages temporaires ou \u00e0 faible trafic<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Timing_of_Glass_Bead_Application\"><\/span>Moment d'application des billes de verre<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Le timing est crucial lors de l'\u00e9pandage des billes de verre :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Les perles doivent \u00eatre appliqu\u00e9es imm\u00e9diatement apr\u00e8s la pulv\u00e9risation de peinture.<\/li>\n\n\n\n<li>Pour les thermoplastiques, les billes doivent \u00eatre d\u00e9pos\u00e9es alors que le mat\u00e9riau est encore chaud et fondu.<\/li>\n\n\n\n<li>Une application tardive r\u00e9duit l'ancrage des billes et la r\u00e9flectivit\u00e9.<\/li>\n<\/ul>\n\n\n\n<p>Un timing correct garantit que les billes s'enfoncent d'environ 50 \u00e0 60 % de leur diam\u00e8tre, ce qui est id\u00e9al pour la r\u00e9tror\u00e9flexion.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Il est essentiel de comprendre comment les billes de verre sont r\u00e9parties dans le marquage routier pour obtenir des marquages s\u00fbrs, durables et tr\u00e8s visibles. En choisissant la bonne m\u00e9thode de r\u00e9partition, en utilisant un \u00e9quipement appropri\u00e9 et en contr\u00f4lant les taux d'application, les projets de marquage routier peuvent offrir des performances nocturnes sup\u00e9rieures et une valeur \u00e0 long terme.<\/p>\n\n\n\n<p>Des billes de verre bien appliqu\u00e9es am\u00e9liorent non seulement la visibilit\u00e9 nocturne, mais jouent \u00e9galement un r\u00f4le essentiel dans la r\u00e9duction des accidents de la route et l'am\u00e9lioration de la s\u00e9curit\u00e9 routi\u00e8re globale.<\/p>","protected":false},"excerpt":{"rendered":"<p>Glass beads play a critical role in road marking systems, significantly improving nighttime visibility and overall traffic safety. Understanding how glass beads are spread in road marking helps road authorities, contractors, and engineers achieve optimal retroreflectivity and long-lasting pavement markings. What Are Glass Beads in Road Marking? Glass beads are small, spherical particles made from recycled or virgin glass. When embedded in road marking paint or thermoplastic materials, they reflect vehicle headlights back toward drivers. The effectiveness of this reflection is commonly measured in RL values using a Retroreflectometer, which is a standard testing instrument in road safety engineering. Why Proper Glass Bead Spreading Matters Correct spreading of glass beads directly affects: Improper spreading can lead to poor reflection, early bead loss, or uneven marking quality. Main Methods of Spreading Glass Beads 1. Drop-On Method (Most Common) The drop-on method is the most widely used technique. Glass beads are applied immediately after the road marking material is sprayed or extruded. &#8230;<\/p>","protected":false},"author":1,"featured_media":4410,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-4409","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How Glass Beads Are Spread in Road Marking - Roadsky<\/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:\/\/roadskymarking.com\/fr\/how-glass-beads-are-spread-in-road-marking.html\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How Glass Beads Are Spread in Road Marking - Roadsky\" \/>\n<meta property=\"og:description\" content=\"Glass beads play a critical role in road marking systems, significantly improving nighttime visibility and overall traffic safety. Understanding how glass beads are spread in road marking helps road authorities, contractors, and engineers achieve optimal retroreflectivity and long-lasting pavement markings. What Are Glass Beads in Road Marking? Glass beads are small, spherical particles made from recycled or virgin glass. When embedded in road marking paint or thermoplastic materials, they reflect vehicle headlights back toward drivers. The effectiveness of this reflection is commonly measured in RL values using a Retroreflectometer, which is a standard testing instrument in road safety engineering. Why Proper Glass Bead Spreading Matters Correct spreading of glass beads directly affects: Improper spreading can lead to poor reflection, early bead loss, or uneven marking quality. Main Methods of Spreading Glass Beads 1. Drop-On Method (Most Common) The drop-on method is the most widely used technique. Glass beads are applied immediately after the road marking material is sprayed or extruded. ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/roadskymarking.com\/fr\/how-glass-beads-are-spread-in-road-marking.html\/\" \/>\n<meta property=\"og:site_name\" content=\"Nanjing Roadsky Traffic Facility Co.,Ltd. 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Understanding how glass beads are spread in road marking helps road authorities, contractors, and engineers achieve optimal retroreflectivity and long-lasting pavement markings. What Are Glass Beads in Road Marking? Glass beads are small, spherical particles made from recycled or virgin glass. When embedded in road marking paint or thermoplastic materials, they reflect vehicle headlights back toward drivers. The effectiveness of this reflection is commonly measured in RL values using a Retroreflectometer, which is a standard testing instrument in road safety engineering. Why Proper Glass Bead Spreading Matters Correct spreading of glass beads directly affects: Improper spreading can lead to poor reflection, early bead loss, or uneven marking quality. Main Methods of Spreading Glass Beads 1. Drop-On Method (Most Common) The drop-on method is the most widely used technique. 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