It is common for anisotropy to occur in architectural float hea

  • It is a term used in the façade industry to describe the appearance of patterns and vibrant areas in heat-treated glass when the display cabinet door is viewed through it under specific lighting and viewing conditions.

    Skanska Construction UK Ltd's Saverio Pasetto delivered the first presentation of this paper at the GPD 2015 conference, where he was greeted with enthusiastic applause for his efforts.

    Most important points are condensed into a short and concise statement

    Anisotropy (also known as leopard spots) is a term that many of you who work in the façade or glass industries are likely to be familiar with. Under specific lighting and viewing conditions, it describes the appearance of patterns and colorful areas in heat-treated glass when viewed from different angles. Conflicts over the phenomenon frequently arise between members of the cladding supply chain and their clients, with the possibility that these disagreements will escalate into legal action in some cases.



    Following this decision, a review of the literature was carried out in order to determine the causes of anisotropy as well as the conditions that can influence the occurrence and severity of the condition. Results of the review were presented in a report. It was also determined how to minimize its visibility to the greatest extent possible by researching the current state of the art in manufacturing and measurement processes. According to the findings of this study, polarized light, viewing angle, and stresses in the quisure insulated glass plate are all factors that influence the visibility of this phenomenon, with the latter factor being influenced by temperature distribution throughout the heat treatment process, among others.

    Equipment and processes used by a small number of specialized insulated glass (IGU) suppliers to temper their products appear to have been modified in order to reduce the likelihood of this happening again. Modern scanner technology, according to the researchers, may be capable of detecting and analyzing anisotropy patterns, which could then result in a more targeted design and operation of tempering ovens in order to reduce the visibility of anisotropic phenomena in the finished product. According to the display cabinet insulated glass door Industry Association, the glass industry has made significant strides forward since then, despite the fact that it had previously stated that this unavoidable issue could not be mitigated.

    In order to determine the definition of acceptance and rejection criteria, as well as to determine the definition of acceptance and rejection criteria, continuous improvement of measuring equipment is required, just as it is for the objective definition of acceptance and rejection criteria. This is not considered a defect in standards and guidelines at this time, but rather an easily visible effect; however, these considerations may become part of regulatory standards and guidelines revisions in the near future, if they are not already included in them. Specifications for glass that has either reduced anisotropy or no anisotropy at all are sometimes specified as an alternative; however, this is true in some cases but not all.

    Those who took part in a large-scale survey that included architects, glass suppliers, specialty facade contractors, and façade consultants revealed a clear division between those in the supply chain who accepted the phenomenon and those in the design and construction industries who desired to use glass with less anisotropy (shrinkage) in order to reduce costs.

    It was also necessary to provide a thorough explanation of anisotropy, as well as to examine the shortcomings of current standards, which lack objective acceptance parameters and specifications, resulting in lengthy qualification processes and the possibility of disputes. Anisotropy is a topic on which many stakeholders have expressed an interest in receiving current information on why the phenomenon occurs, how it affects the industry today, and what can be done to reduce the phenomenon's visible presence in the industry. The findings of this study may also be used to inform further research in order to support such action, and to inform further research in order to support such action and to support such action, amongst other things. To assist in the implementation of such measures, the findings of this study may be used to inform further research.