{"id":424,"date":"2015-01-26T23:33:09","date_gmt":"2015-01-26T21:33:09","guid":{"rendered":"http:\/\/54.93.104.239\/?p=424"},"modified":"2022-11-09T16:50:13","modified_gmt":"2022-11-09T14:50:13","slug":"anisotropy-defect-heat-treated-glass","status":"publish","type":"post","link":"https:\/\/www.glastory.net\/fi\/anisotropy-defect-heat-treated-glass\/","title":{"rendered":"Is anisotropy a defect in heat-treated glass?"},"content":{"rendered":"

Anisotropy = iridescence = leopard spots = strain pattern<\/em><\/strong><\/h2>\n

One of the most burning topics\u00a0in the glass industry is whether anisotropy is a defect or not? The majority of glass suppliers rely\u00a0on the standards. These standards\u00a0state\u00a0that anisotropy is not a defect but an inherent part of the tempering process. This is true. Building designers and end clients refuse to accept glass with visible anisotropy. This is understandable. So we have a typical situation where something has gone wrong and we don’t know who to blame. Later in this post, you will find some actual research on the\u00a0differences in opinion.<\/p>\n

I say that we’re talking about the wrong topic! Or let me rephrase,\u00a0we should talk about anisotropy, but not fight the development<\/strong>. I do understand there can be difficult individual cases where the parties have different opinions on what should be approved and what not. Especially when there is big money involved.<\/p>\n

However, as an industry, we should not fight against the natural evolution\u00a0in\u00a0customer expectations. We should accept the fact that\u00a0end customers require more. And\u00a0we should find solutions to provide them with what they are looking for.<\/strong> It is our job to deliver\u00a0better solutions to make our customers\u00a0happy \u2013 and not fight with them about what is acceptable and what is not.<\/p>\n

On\u00a0to the research I promised you. One of my glass industry colleagues, Mr. Saverio Pasetto, who works as Fa\u00e7ade Technical Director at Skanska, a major construction group, did a very interesting study last year entitled: “Anisotropy as a defect in U.K. architectural float heat-treated glass.”<\/p>\n

Saverio represents the side of the end customer and works frequently with problems and possibilities that we from the glass industry give him. In his dissertation, Saverio conducted\u00a0a 15-question survey of\u00a035 key stakeholders, including architects, glass suppliers, fa\u00e7ade contractors and fa\u00e7ade consultants, to find out if\u00a0anisotropy is a problem and, if so, how big of a\u00a0problem it actually is.<\/p>\n

With Saverio\u2019s permission, I\u2019ll share a\u00a0couple of questions and results\u00a0from his study:<\/p>\n

\n

First question: “Do you consider anisotropy in\u00a0<\/em><\/strong>architectural <\/strong><\/em><\/p>\n

float glass to be a defect?”<\/strong><\/em><\/p>\n<\/blockquote>\n

 <\/p>\n

\"is

According to this, most of the respondents\u00a0know that anisotropy is not an actual defect technically, or rather, according to the standards. However, when the same people were asked the second question, it gets interesting.<\/p>\n

 <\/p>\n

\n

Second question:\u00a0“Please rate how much of a problem you think\u00a0<\/em><\/strong><\/p>\n

anisotropy is for the\u00a0<\/strong>fa\u00e7ade industry.”<\/strong><\/em><\/p>\n<\/blockquote>\n

\"how

We then get results where over half the respondents\u00a0say anisotropy is a critical or an important problem in practically every phase of the process. I repeat: over<\/strong>\u00a0half of the people involved feel anisotropy is a major problem in all parts of fa\u00e7ade building<\/strong>. Let’s face it \u2013 we have an issue on our hands.<\/p>\n

For all of us\u00a0who work in the glass processing field, we need to\u00a0recognize this is an issue and start to provide solutions. From a tempering line point of view, this means paying attention to the tempering line selection. But more importantly, how it is used in everyday production?<\/p>\n

Learn about the phenomenon and what you can do to minimize it:\u00a0What is iridescence (anisotropy) and 5 ways to reduce it in tempered glass<\/a>.<\/p>\n

If you are also\u00a0interested in the full research document by Saverio, please\u00a0go to the\u00a0Resources section to download<\/a> the document.<\/p>\n

Source:<\/strong> Saverio Pasetto, “Anisotropy as a defect in U.K. architectural float heat-treated glass.” 09\/2014. \u00a0Dissertation for MSc in Fa\u00e7ade Engineering, University of Bath (UK)<\/p>\n","protected":false},"excerpt":{"rendered":"

Anisotropy = iridescence = leopard spots = strain pattern One of the most burning topics\u00a0in the glass industry is whether anisotropy is a defect or not? The majority of glass suppliers rely\u00a0on the standards. These standards\u00a0state\u00a0that anisotropy is not a defect but an inherent part of the tempering process. This is true. Building designers and […]<\/p>\n","protected":false},"author":66,"featured_media":142,"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":[11],"tags":[937,1196,922,1020,971,924,992,931],"acf":[],"aioseo_notices":[],"yoast_head":"\nIs anisotropy a defect in heat-treated glass?<\/title>\n<meta name=\"description\" content=\"Anisotropy (iridescence, leopard spots) is under constant debate. People disagree on it, however, there are ways to minimize it. 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