Final Program

The potential presence of Nickel Sulfide (NiS), which contaminates glass melt, can provoke “spontaneous” rupture even after years from installation. All glass plates bearing a security risk have to be subject to Heat Soak Test (HST), i.e., they are exposed to a certain temperature for a certain time so to destroy the glass panes affected […]

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As a manufacturer and supplier of monolithic, laminated and insulated glass panels to the high-end retail and business markets, we produce larger panels that must use heat-treated components, ionoplast interlayers and multi-layer assemblies. This invariably produces optical phenomena that are observable, but deemed inevitable, physical properties inherent to glass manufacturing. We want to offer higher […]

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Louis Moreau

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Spontaneous failure of glass units due to Nickle Sulphide inclusions have been studied tested since the early 1960’s. People have been injured and property and reputations damaged. The glass industry has responded and the work of many dedicated people have led to a general satisfaction within the industry and general population that the issue of […]

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Heat Soak Testing of Thermally Toughened (Tempered) glass is carried out for the purpose of minimising the risk of spontaneous fracture of the glass, due to the presence of Nickel sulphide inclusions. However, spontaneous fracture of the glass sometimes occurs, even after the manufacturer has claimed that Heat Soak Testing was carried out. Therefore, a […]

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In a glass tempering process residual stresses to glass are made with heat treatment. The process includes heating and cooling and they should be equal on both sides of the glass pane. In addition, heat transfer should be locally uniform on both sides of the glass, which is difficult in practice to fulfil. Cooling, which […]

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Designers use exposed glass edges for decoration, for example within glass steps, glass beams or glass columns. This application requires a mechanical finishing to realize a high optical quality and to compensate the edge notch resulting from the lamination process. Regrinding of annealed glass is allowed, but in the case of glass with load bearing […]

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Digital technologies are becoming more and more important to assist in completely automated factories – this trend has also become an important and essential part in the design of modern and fully automated glass processing companies. Besides these new technologies, integrated software ERP solutions are essential to achieve complete automation. Only by closing the gaps […]

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NiS inclusions are found everywhere in the raw glass; their repartition is visibly influenced by gravitational settling (Author’s presentation GPD 2017). We explain this physically, applying STOKES’ settling theory. Further elaboration with more parameters allows to understand the observed nickel sulphide inclusion size spectrum. Obviously only a minority of the original NiS population (c.15%) arrives […]

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Andreas M Kasper

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In a tempering furnace glass is on top of rotating ceramic rollers, where it is exposed to radiation emitted by radiant heaters, rollers and other surfaces inside the furnace. Convection heat transfer between hot air jets and glass affects both surfaces. On the lower surface also contact heat transfer between glass and rollers takes place. […]

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