{"id":6847,"date":"2017-09-26T10:51:58","date_gmt":"2017-09-26T07:51:58","guid":{"rendered":"https:\/\/www.glastory.net\/?p=6847"},"modified":"2022-11-09T16:39:59","modified_gmt":"2022-11-09T14:39:59","slug":"towards-better-anisotropy","status":"publish","type":"post","link":"https:\/\/www.glastory.net\/de\/towards-better-anisotropy\/","title":{"rendered":"Towards better anisotropy"},"content":{"rendered":"<p>Ever looked at a building\u2019s glass facade through polarized sunglasses? If so, you may have noticed patterning or spotting on it. This phenomenon is called anisotropy \u2013 or iridescence \u2013 and occurs in tempered glass as a result of heat treatment. Although there are still no standards for acceptable anisotropy levels in glass, some&nbsp;breakthrough in regard to the phenomenon has taken&nbsp;place recently.<\/p>\n<p>When it comes to the visual quality of heat-treated glass, anisotropy has become more and more an acknowledged concern for glass processors, architects and their clients.<\/p>\n<p>Since anisotropy is caused by stress differences in glass during the heating and cooling phases, it is inevitable in heat-treated glass. Customers, however, sometimes refuse to accept glass with anisotropy levels they feel are too high, making the phenomenon an issue for glass processors as well.<\/p>\n<h2><strong>Phenomenon with no standards<\/strong><\/h2>\n<p>To date, there are no standards when it comes to anisotropy. The intensity of strain patterns may vary from slightly visible under certain conditions to obvious under most conditions. Anisotropy can also appear in different kinds of patterns. And everyone has their own opinion about what looks good and what looks bad. So, acceptable levels differ from project to project. The prominence of anisotropy also depends on visual conditions surrounding the glass.<\/p>\n<blockquote><p>Seeing anisotropy is easy. All you need is a polarization filter, like the one in sunglasses, with polarized light coming through the glass. Measuring it, however, is much harder. How can you reliably measure something that has no standards?<\/p><\/blockquote>\n<h3><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-large wp-image-6872 lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-src=\"https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLooK-Anisotropy-1-1126x605.png\" alt=\"Glaston iLooK Anisotropy\" width=\"1126\" height=\"605\" data-sizes=\"auto\" data-srcset=\"https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLooK-Anisotropy-1-1126x605.png 1126w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLooK-Anisotropy-1-300x161.png 300w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLooK-Anisotropy-1-768x413.png 768w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLooK-Anisotropy-1-640x344.png 640w\" sizes=\"(max-width: 1126px) 100vw, 1126px\" \/><noscript><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-large wp-image-6872\" src=\"https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLooK-Anisotropy-1-1126x605.png\" alt=\"Glaston iLooK Anisotropy\" width=\"1126\" height=\"605\" srcset=\"https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLooK-Anisotropy-1-1126x605.png 1126w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLooK-Anisotropy-1-300x161.png 300w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLooK-Anisotropy-1-768x413.png 768w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLooK-Anisotropy-1-640x344.png 640w\" sizes=\"(max-width: 1126px) 100vw, 1126px\" \/><\/noscript><\/h3>\n<h2><strong>Measuring anisotropy<\/strong><\/h2>\n<p>The main problem is that anisotropy can be very different in different conditions, such as geographical location, time of year and time of day. Also, the \u201clevel of anisotropy\u201d is very hard to quantify. It\u2019s not like a roller wave, where a trained eye can evaluate the amount of roller wave just by looking at the glass. Anisotropy may present itself, for example, as vertical or diagonal lines in the glass, or as spots in the glass such as seen in the rear windows of cars. Then again, which one of these is best? Or worst? As long as a universal standard doesn\u2019t exist, there\u2019s no way to answer this question. Everyone has their own opinion \u2013 which means we may even need more than one method to evaluate anisotropy.<\/p>\n<blockquote><p>Having a unified evaluating method, or methods, would certainly make our lives easier. So, as we are slowly moving towards an anisotropy standard, what can be done in the meantime?<\/p><\/blockquote>\n<p>Let\u2019s consider roller wave again as an example. Standards define certain limits for roller wave defects, but the limits are generally quite loose. In many cases, a glass that passes a standard can still be far from good aesthetically \u2013 again, subjectively speaking. This has led to a situation where tempered glass manufacturers set their own project- or customer-specific \u201cstandards\u201d rather than relying solely on official standards. And even if official standards are used, supplier selection in many cases is based on the general quality of the end product a supplier provides.<\/p>\n<p>See where I\u2019m going with this? Anisotropy doesn\u2019t affect the mechanical strength of glass, so it\u2019s not a safety issue. Still, aesthetics are often the main rationale for using glass in a project and are also what is driving this discussion around anisotropy. Now that we have a method for scanning the anisotropy of each glass piece produced, there\u2019s nothing stopping producers from agreeing on suitable levels of it with their customers. The important thing is that both parties understand how the evaluation of anisotropy depends on the system used \u2013 and also that currently there is no right or wrong way to do it.<\/p>\n<p>In 2017, Glaston launched <a href=\"http:\/\/www.glaston.net\/upgrade\/ilook\/\" target=\"_blank\" rel=\"noopener noreferrer\">an online solution <\/a>that is up to the challenge of visualizing and quantifying the level of anisotropy in heat-treated glass \u2013 iLooK Anisotropy. Scanning glass for anisotropy gives processors a new tool to continuously monitor quality, test mock-ups, experiment with machine settings and improve production methods. It allows for new improvements in the tempering process and raises the bar for customer satisfaction.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-large wp-image-6859 lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-src=\"https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLook_001-1126x634.png\" alt=\"Glaston iLooK Anisotropy online scanning\" width=\"1126\" height=\"634\" data-sizes=\"auto\" data-srcset=\"https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLook_001-1126x634.png 1126w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLook_001-339x192.png 339w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLook_001-300x169.png 300w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLook_001-768x432.png 768w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLook_001-640x360.png 640w\" sizes=\"(max-width: 1126px) 100vw, 1126px\" \/><noscript><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-large wp-image-6859\" src=\"https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLook_001-1126x634.png\" alt=\"Glaston iLooK Anisotropy online scanning\" width=\"1126\" height=\"634\" srcset=\"https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLook_001-1126x634.png 1126w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLook_001-339x192.png 339w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLook_001-300x169.png 300w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLook_001-768x432.png 768w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/iLook_001-640x360.png 640w\" sizes=\"(max-width: 1126px) 100vw, 1126px\" \/><\/noscript><\/p>\n<h2><strong>Everyone up to the challenge<\/strong><\/h2>\n<p>Switching older lines to the latest tempering lines is one solution for achieving evenness in heating and cooling. But there\u2019s a lot that can be done with older lines as well, such as adjusting heating time and transfer time \u2013 or running shorter loads. By adding a single smart tool, glass processors can meet this new challenge.<\/p>\n<p>Some years from now, the industry might finally come to an agreement on clear standards for anisotropy. <a href=\"https:\/\/www.gii.fi\/\" target=\"_blank\" rel=\"noopener noreferrer\">The Glass Innovation Institute<\/a>, for example, is aiming to develop some universal standards. When this happens, technology that ensures your processed glass meets standards will not be just a helpful tool \u2013 it will be a necessity.<\/p>\n<p>Download a presentation Towards better anisotropy from GPD 2017 conference.<\/p>\n<p><a href=\"http:\/\/www2.glaston.net\/gpd2017-towards-better-anisotropy\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone wp-image-6878 size-large lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-src=\"https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/GPD-2017-Towards-better-anisotropy-by-Riku-F\u00e4rm_CTA-1126x384.png\" alt=\"GPD 2017 Towards better anisotropy by Riku F\u00e4rm\" width=\"1126\" height=\"384\" data-sizes=\"auto\" data-srcset=\"https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/GPD-2017-Towards-better-anisotropy-by-Riku-F\u00e4rm_CTA-1126x384.png 1126w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/GPD-2017-Towards-better-anisotropy-by-Riku-F\u00e4rm_CTA-300x102.png 300w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/GPD-2017-Towards-better-anisotropy-by-Riku-F\u00e4rm_CTA-768x262.png 768w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/GPD-2017-Towards-better-anisotropy-by-Riku-F\u00e4rm_CTA-640x218.png 640w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/GPD-2017-Towards-better-anisotropy-by-Riku-F\u00e4rm_CTA.png 1840w\" sizes=\"(max-width: 1126px) 100vw, 1126px\" \/><noscript><img decoding=\"async\" loading=\"lazy\" class=\"alignnone wp-image-6878 size-large\" src=\"https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/GPD-2017-Towards-better-anisotropy-by-Riku-F\u00e4rm_CTA-1126x384.png\" alt=\"GPD 2017 Towards better anisotropy by Riku F\u00e4rm\" width=\"1126\" height=\"384\" srcset=\"https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/GPD-2017-Towards-better-anisotropy-by-Riku-F\u00e4rm_CTA-1126x384.png 1126w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/GPD-2017-Towards-better-anisotropy-by-Riku-F\u00e4rm_CTA-300x102.png 300w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/GPD-2017-Towards-better-anisotropy-by-Riku-F\u00e4rm_CTA-768x262.png 768w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/GPD-2017-Towards-better-anisotropy-by-Riku-F\u00e4rm_CTA-640x218.png 640w, https:\/\/www.glastory.net\/wp-content\/uploads\/2017\/09\/GPD-2017-Towards-better-anisotropy-by-Riku-F\u00e4rm_CTA.png 1840w\" sizes=\"(max-width: 1126px) 100vw, 1126px\" \/><\/noscript><\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ever looked at a building\u2019s glass facade through polarized sunglasses? If so, you may have noticed patterning or spotting on it. This phenomenon is called anisotropy \u2013 or iridescence \u2013 and occurs in tempered glass as a result of heat treatment. Although there are still no standards for acceptable anisotropy levels in glass, some&nbsp;breakthrough in [&hellip;]<\/p>\n","protected":false},"author":1092,"featured_media":6872,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"ngg_post_thumbnail":0,"footnotes":""},"categories":[1],"tags":[6,1160,264,81,197,71,10,194,260,7,202,190,15,131],"acf":[],"aioseo_notices":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Towards better anisotropy &ndash; Glastory<\/title>\n<meta name=\"description\" content=\"Phenomenon called anisotropy\/iridescence occurs in tempered glass as a result of heat treatment and there are still no standards for acceptable anisotropy levels.\" \/>\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.glastory.net\/towards-better-anisotropy\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Towards better anisotropy &ndash; 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Sales Engineering at Glaston. He is keen on working with customers and developing new business- and technology-related things \u2013 which makes product management a natural fit for him. In everything Riku does, he aims to ensure that glass processing customers are as successful as possible. This drives Riku and challenges him every day to think about what could be done better. Riku is an e-sports enthusiast. Aside from watching, he also enjoys playing the games that he actively follows.","sameAs":["http:\/\/www.glaston.net"],"url":"https:\/\/www.glastory.net\/de\/author\/rikufarm\/"}]}},"_links":{"self":[{"href":"https:\/\/www.glastory.net\/de\/wp-json\/wp\/v2\/posts\/6847"}],"collection":[{"href":"https:\/\/www.glastory.net\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.glastory.net\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.glastory.net\/de\/wp-json\/wp\/v2\/users\/1092"}],"replies":[{"embeddable":true,"href":"https:\/\/www.glastory.net\/de\/wp-json\/wp\/v2\/comments?post=6847"}],"version-history":[{"count":14,"href":"https:\/\/www.glastory.net\/de\/wp-json\/wp\/v2\/posts\/6847\/revisions"}],"predecessor-version":[{"id":10572,"href":"https:\/\/www.glastory.net\/de\/wp-json\/wp\/v2\/posts\/6847\/revisions\/10572"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.glastory.net\/de\/wp-json\/wp\/v2\/media\/6872"}],"wp:attachment":[{"href":"https:\/\/www.glastory.net\/de\/wp-json\/wp\/v2\/media?parent=6847"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.glastory.net\/de\/wp-json\/wp\/v2\/categories?post=6847"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.glastory.net\/de\/wp-json\/wp\/v2\/tags?post=6847"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}