Glossary for Glass and Glazing terms

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A

anneal

To control the residual stresses in glass by controlled heating at, and cooling from, a suitable temperature.


annealed glass

Technical definition of the stress condition of ordinary glass.


annealing

Process designed to eliminate or limit stresses to glass by submitting the glass to strictly controlled cooling in a special oven known as a ‘lehr’.


annealing point

Temperature at which the viscosity of the glass is approximately 1013 poises. At the annealing point of glass, internal stresses are substantially relieved in a matter of minutes.


anti-bandit glazing

A type of security glazing designed to resist manual attack and to delay access to the protected space for a short period of time.


anti-walk blocks

See edge blocks


antique glass

Glass with an uneven surface texture and bubbles inside, produced by using antique methods in order to obtain the appearance of glass made before the development of industrial processes.


application life

Period of time during which a sealant can be effectively applied to a joint. The timing is from completion of mixing and could be affected by temperature, humidity or a combination of both.


arrised edge

The result of removing sharp edges.


artwork

A design developed primarily for reproduction.



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