{"id":25518,"date":"2026-10-29T14:05:30","date_gmt":"2026-10-29T06:05:30","guid":{"rendered":"https:\/\/www.sanait.com\/?p=25518"},"modified":"2026-10-29T14:05:56","modified_gmt":"2026-10-29T06:05:56","slug":"why-cast-acrylic-costs-more","status":"publish","type":"post","link":"https:\/\/www.sanait.com\/fr\/why-cast-acrylic-costs-more\/","title":{"rendered":"Pourquoi l'acrylique moul\u00e9 co\u00fbte-t-il plus cher ?"},"content":{"rendered":"\n<style>\n\/* Sanait Guide \u2014 Why Cast Acrylic Costs More\n   Scope all rules under .sa-guide so the block does not fight the WP theme. *\/\n.sa-guide {\n  --sa-ink: #1c2430;\n  --sa-muted: #5b6573;\n  --sa-line: #d9dee6;\n  --sa-paper: #f6f4ef;\n  --sa-card: #ffffff;\n  --sa-accent: #1f5f5b;\n  --sa-accent-soft: #e6f1f0;\n  --sa-warn: #8a5a12;\n  --sa-warn-soft: #f7eedf;\n  --sa-max: 760px;\n  color: var(--sa-ink);\n  font-family: Georgia, \"Times New Roman\", Times, serif;\n  font-size: 18px;\n  line-height: 1.65;\n  letter-spacing: 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8px;\n  background: var(--sa-paper);\n  border: 1px solid var(--sa-line);\n  padding: 18px 20px;\n  margin: 28px 0 22px;\n}\n\n.sa-guide .sa-author h2 {\n  margin: 0;\n  font-size: 13px;\n  letter-spacing: 0.08em;\n  text-transform: uppercase;\n  color: var(--sa-muted);\n}\n\n.sa-guide .sa-author-name {\n  font-weight: 700;\n  font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif;\n  margin: 0;\n}\n\n.sa-guide .sa-author-role {\n  margin: 0;\n  color: var(--sa-muted);\n  font-size: 0.88em;\n}\n\n.sa-guide .sa-src h2 {\n  margin-top: 1.6em;\n}\n\n.sa-guide .sa-src-list {\n  font-size: 0.88em;\n  color: var(--sa-muted);\n}\n\n.sa-guide .sa-src-list li {\n  margin: 0 0 8px;\n}\n\n.sa-guide .sa-related {\n  margin: 0 0 8px;\n}\n\n.sa-guide .sa-related ul {\n  margin-bottom: 0;\n}\n\n.sa-guide .sa-meta {\n  font-size: 13px;\n  color: var(--sa-muted);\n  margin: 0 0 18px;\n}\n\n<\/style>\n<div class=\"sa-guide\">\n  <div class=\"sa-wrap\">\n\n    <p class=\"sa-kicker\">\n      <span class=\"sa-chip\">Cost guide<\/span>\n      <span>Cast acrylic<\/span>\n    <\/p>\n\n    <p class=\"sa-meta\">By David Deng \u00b7 R&#038;D manager, Sanait \u00b7 Updated October 2026<\/p>\n\n    <p class=\"sa-lede\">Cast acrylic usually costs more than extruded acrylic because the sheet is made differently, and because the parts that need cast also need more stations after the sheet. The premium is not a quality medal. It is the price of a route that polishes and solvent-bonds cleanly. If the part does not need that route, you are paying for a sheet you will not use.<\/p>\n\n    <aside class=\"sa-takeaway\" aria-label=\"Key takeaways\">\n      <h2>Key takeaways<\/h2>\n      <ul>\n        <li>Cast sheet itself is generally more expensive to produce than extruded sheet of the same nominal thickness.<\/li>\n        <li>Parts specified as cast are usually also polished and bonded. Those stations, not the word \u201ccast,\u201d are often the larger line.<\/li>\n        <li>There is no honest public percentage. Mill, thickness, tint, and quantity move the gap.<\/li>\n        <li>A cheaper quote that switched to extruded is a different part, not a discount.<\/li>\n        <li>Paying for cast on a hidden back or a simple bend is how buyers overpay.<\/li>\n        <li>Cast is not a UV grade, a food grade, or a brand. Those are separate lines.<\/li>\n      <\/ul>\n    <\/aside>\n\n    <nav class=\"sa-toc\" aria-label=\"On this page\">\n      <h2>On this page<\/h2>\n      <ol>\n        <li><a href=\"#answer\">The short answer<\/a><\/li>\n        <li><a href=\"#sheet\">Why the sheet costs more<\/a><\/li>\n        <li><a href=\"#stations\">Why the part costs more<\/a><\/li>\n        <li><a href=\"#gap\">What actually moves the gap<\/a><\/li>\n        <li><a href=\"#overpay\">Where the premium is wasted<\/a><\/li>\n        <li><a href=\"#compare\">How to compare two quotes<\/a><\/li>\n        <li><a href=\"#faq\">FAQ<\/a><\/li>\n        <li><a href=\"#sources\">Sources<\/a><\/li>\n      <\/ol>\n    <\/nav>\n\n    <h2 id=\"answer\">The short answer<\/h2>\n\n    <div class=\"sa-def\">\n      <p><strong>Working answer.<\/strong> Cast costs more for two stacked reasons: the sheet is a slower, batch process, and the jobs that specify cast usually add polish and solvent joints. Pay the premium when an edge or a joint faces the customer. Do not pay it because the email said \u201cbetter acrylic.\u201d<\/p>\n    <\/div>\n\n    <h2 id=\"sheet\">Why the sheet costs more<\/h2>\n\n    <p>Cell-cast acrylic is poured between plates and cured. That is the process ISO 7823-1 describes. It is a batch. Plate, pour, cure, separate. Extruded acrylic is pushed continuously through a die \u2014 ISO 7823-2. Continuous production is generally the cheaper way to make a thin, consistent sheet.<\/p>\n\n    <p>That process difference is why a cast blank usually enters the factory at a higher sheet price than an extruded blank of the same nominal thickness and tint. It is not because cast is a luxury brand. A named mill can sit on top of either route and move the price again.<\/p>\n\n    <p>Thickness works in the same direction on both routes: more plastic, more money. A thick cast plinth is expensive because it is thick and cast, not because of a single \u201ccast multiplier.\u201d<\/p>\n\n    <h2 id=\"stations\">Why the part costs more<\/h2>\n\n    <p>Buyers rarely buy cast sheet and stop. They buy it because:<\/p>\n    <ul>\n      <li>The edge will be polished, and cast polishes more cleanly than extruded.<\/li>\n      <li>The joint will be solvent-bonded and meant to disappear. Cast-to-cast is the normal clear joint on a display box.<\/li>\n      <li>The face is thick, or optical, or both.<\/li>\n    <\/ul>\n\n    <p>Each of those is a station: programming, a crew, a reject risk. Blush on a joint is scrap. A polish that does not match the sample is scrap. Scrap is in the price whether or not it is a line on the quote.<\/p>\n\n    <p>So a \u201ccast cube\u201d price is sheet plus stations. Comparing it with an extruded holder that was only laser-cut is comparing two different factories of work. The route gap and the station gap are both real. Only one of them is the sheet.<\/p>\n\n    <h2 id=\"gap\">What actually moves the gap<\/h2>\n\n    <div class=\"sa-table-wrap\">\n      <table>\n        <caption>What widens or narrows the cast premium \u2014 no percentages<\/caption>\n        <thead>\n          <tr>\n            <th scope=\"col\">Factor<\/th>\n            <th scope=\"col\">Effect on the gap<\/th>\n          <\/tr>\n        <\/thead>\n        <tbody>\n          <tr>\n            <th scope=\"row\">Thickness<\/th>\n            <td>Thicker cast uses more of the expensive blank. The gap usually grows with gauge.<\/td>\n          <\/tr>\n          <tr>\n            <th scope=\"row\">Tint and mill<\/th>\n            <td>A named optical or a color can exceed the route gap. Generic clear is the fair comparison.<\/td>\n          <\/tr>\n          <tr>\n            <th scope=\"row\">Polish and joints<\/th>\n            <td>Often larger than the sheet gap on a small cube. An extruded part with no polish is not the same job.<\/td>\n          <\/tr>\n          <tr>\n            <th scope=\"row\">Quantity<\/th>\n            <td>Sheet route is per piece. Setup is per design. A tiny first run makes both look expensive.<\/td>\n          <\/tr>\n          <tr>\n            <th scope=\"row\">Yield<\/th>\n            <td>Tight optical faces raise scrap on either route. Scrap is not free on the cheaper sheet.<\/td>\n          <\/tr>\n        <\/tbody>\n      <\/table>\n    <\/div>\n\n    <p>Anyone who quotes \u201ccast is X percent more\u201d without thickness, mill, and the station list is guessing. Ask for the two routes on the same drawing if you want the real gap.<\/p>\n\n    <h2 id=\"overpay\">Where the premium is wasted<\/h2>\n\n    <div class=\"sa-grid sa-grid-2\">\n      <div class=\"sa-card\">\n        <h3>Hidden back of a cube<\/h3>\n        <p>If it is not polished and not a show joint, extruded is often enough. Write \u201cextruded, hidden\u201d so you are not billed for cast you will not see.<\/p>\n      <\/div>\n      <div class=\"sa-card\">\n        <h3>Simple bent holder<\/h3>\n        <p>One bend, no polished edge. Extruded is the usual cost route. Cast here is a habit, not a requirement.<\/p>\n      <\/div>\n      <div class=\"sa-card\">\n        <h3>Cast specified, then flame-only edge<\/h3>\n        <p>You paid for a sheet that can take a diamond polish, then specified a finish extruded could also wear. Match the finish to the route.<\/p>\n      <\/div>\n      <div class=\"sa-card\">\n        <h3>\u201cCast\u201d used to mean outdoor<\/h3>\n        <p>Weathering is a grade. Cast is a process. Specify the grade if the face sits in a window. Do not buy cast as a UV substitute.<\/p>\n      <\/div>\n    <\/div>\n\n    <p>Constructions where the premium is usually earned \u2014 polished faces, clear joints \u2014 are the retail set: <a href=\"https:\/\/www.sanait.com\/custom-acrylic-boxes\/\">boxes<\/a>, <a href=\"https:\/\/www.sanait.com\/custom-acrylic-trays\/\">trays<\/a>, and <a href=\"https:\/\/www.sanait.com\/\">stands<\/a>.<\/p>\n\n    <h2 id=\"compare\">How to compare two quotes<\/h2>\n\n    <ol>\n      <li>Same route on the same members. Cast versus cast, or a stated mix versus the same mix.<\/li>\n      <li>Same thickness, tint, and mill requirement.<\/li>\n      <li>Same edge finish and same joint method.<\/li>\n      <li>Same quantity and same Incoterm.<\/li>\n    <\/ol>\n\n    <p>A gap that remains after those four match is a real price gap. A gap before they match is a different product. This is the same rule as any acrylic quote: align the construction, then read the number.<\/p>\n\n    <p>Sanait prices acrylic work with the route stated. A brief that says only \u201cacrylic\u201d will be asked which sheet. How that plant takes a brief is on the <a href=\"https:\/\/www.sanait.com\/faq\/\">FAQ<\/a>. Scope is on the <a href=\"https:\/\/www.sanait.com\/about-us\/\">about page<\/a>.<\/p>\n\n    <h2 id=\"faq\">FAQ<\/h2>\n\n    <div class=\"sa-faq\">\n      <div class=\"sa-faq-item\">\n        <h3 class=\"sa-faq-q\">Why is cast acrylic more expensive?<\/h3>\n        <p class=\"sa-faq-a\">The sheet is a batch pour-and-cure process, generally costlier than continuous extrusion. Parts that need cast usually also add polish and solvent joints, which cost more again.<\/p>\n      <\/div>\n      <div class=\"sa-faq-item\">\n        <h3 class=\"sa-faq-q\">How much more does cast cost?<\/h3>\n        <p class=\"sa-faq-a\">There is no single percentage. Thickness, mill, tint, polish, joints, and quantity all move it. Ask for both routes on the same drawing.<\/p>\n      <\/div>\n      <div class=\"sa-faq-item\">\n        <h3 class=\"sa-faq-q\">Is the more expensive sheet always worth it?<\/h3>\n        <p class=\"sa-faq-a\">On a polished, bonded show face, usually yes. On a hidden back or a simple bend, usually no. The edge and the joint decide, not the adjective.<\/p>\n      <\/div>\n      <div class=\"sa-faq-item\">\n        <h3 class=\"sa-faq-q\">Does a higher price mean it will not yellow?<\/h3>\n        <p class=\"sa-faq-a\">No. Yellowing is grade and exposure. Cast is the manufacturing route. Specify UV performance separately if the face is in sun.<\/p>\n      <\/div>\n      <div class=\"sa-faq-item\">\n        <h3 class=\"sa-faq-q\">Can I mix cast and extruded to save money?<\/h3>\n        <p class=\"sa-faq-a\">Yes, if you assign them: cast on show faces and joints, extruded on hidden members. Write it on the drawing so the saving is real and the look is agreed.<\/p>\n      <\/div>\n      <div class=\"sa-faq-item\">\n        <h3 class=\"sa-faq-q\">Is a cheap \u201ccast\u201d quote a warning?<\/h3>\n        <p class=\"sa-faq-a\">Ask what cast means on that quote: which mill, which members, whether joints are included. A low number that dropped the polish or switched a face to extruded is a different part.<\/p>\n      <\/div>\n    <\/div>\n\n    <div class=\"sa-author\" id=\"author\">\n      <h2>About the author<\/h2>\n      <p class=\"sa-author-name\">David Deng<\/p>\n      <p class=\"sa-author-role\">R&#038;D manager at Sanait. 10+ years in acrylic fabrication; 2,000+ custom acrylic projects shipped across 20+ countries.<\/p>\n      <p>Sanait Co., Ltd. builds custom acrylic displays in Dongguan. This cost note is general. It does not quote a price. Plant terms are on the <a href=\"https:\/\/www.sanait.com\/faq\/\">FAQ<\/a>. Background is on the <a href=\"https:\/\/www.sanait.com\/about-us\/\">about page<\/a>.<\/p>\n    <\/div>\n\n    <div class=\"sa-related\">\n      <h2>Factory pages<\/h2>\n      <ul>\n        <li><a href=\"https:\/\/www.sanait.com\/faq\/\">Custom acrylic FAQ<\/a><\/li>\n        <li><a href=\"https:\/\/www.sanait.com\/about-us\/\">About Sanait<\/a><\/li>\n        <li><a href=\"https:\/\/www.sanait.com\/custom-acrylic-boxes\/\">Custom acrylic boxes<\/a><\/li>\n        <li><a href=\"https:\/\/www.sanait.com\/custom-acrylic-trays\/\">Custom acrylic trays<\/a><\/li>\n        <li><a href=\"https:\/\/www.sanait.com\/\">Custom display stands<\/a><\/li>\n      <\/ul>\n    <\/div>\n\n    <section class=\"sa-src\" id=\"sources\">\n      <h2>Sources<\/h2>\n      <p>The two routes are defined by the sheet standards. They do not set a price.<\/p>\n      <ol class=\"sa-src-list\">\n        <li>ISO 7823-1:2003, <em>Plastics \u2014 Poly(methyl methacrylate) sheets \u2014 Part 1: Cast sheets<\/em>. <a href=\"https:\/\/www.iso.org\/standard\/33450.html\" rel=\"nofollow noopener\" target=\"_blank\">iso.org<\/a><\/li>\n        <li>ISO 7823-2:2003, <em>Plastics \u2014 Poly(methyl methacrylate) sheets \u2014 Part 2: Extruded sheets<\/em>. <a href=\"https:\/\/www.iso.org\/standard\/33451.html\" rel=\"nofollow noopener\" target=\"_blank\">iso.org<\/a><\/li>\n        <li>\u201cPoly(methyl methacrylate).\u201d <em>Wikipedia<\/em>. <a href=\"https:\/\/en.wikipedia.org\/wiki\/Poly(methyl_methacrylate)\" rel=\"nofollow noopener\" target=\"_blank\">en.wikipedia.org<\/a><\/li>\n      <\/ol>\n    <\/section>\n\n  <\/div>\n<\/div>\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"Article\",\n      \"headline\": \"Why Cast Acrylic Costs More\",\n      \"description\": \"Cast acrylic costs more because the sheet is a batch process and the parts that need it usually add polish and solvent joints. 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It is the price of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38],"tags":[],"class_list":["post-25518","post","type-post","status-publish","format-standard","hentry","category-guide"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Why Cast Acrylic Costs More Than Extruded Sheet<\/title>\n<meta name=\"description\" content=\"Cast acrylic costs more because the sheet is a batch process, and polished joints add stations. There is no fixed percentage. Pay for the edge you need.\" \/>\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.sanait.com\/fr\/why-cast-acrylic-costs-more\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why Cast Acrylic Costs More Than Extruded Sheet\" \/>\n<meta property=\"og:description\" content=\"Cast acrylic costs more because the sheet is a batch process, and polished joints add stations. There is no fixed percentage. 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