The timing is from completion of mixing and could be affected by temperature, humidity or a combination of both. Application Life Period of time during which a sealant can be effectively applied to a joint. 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. Anti Bandit Glazing A type of security glazing, typically laminated glass, designed to resist manual attack and to delay access to the protected space for a short period of time. At the annealing point of glass, internal stresses are substantially relieved in a matter of minutes. Annealing Point Temperature at which the viscosity of the glass is approximately 1013 Poises. Its purpose is to relieve induced stress inherent in the flat glass product to allow normal cold end cutting and processing. Annealing Lehr An on-line, controlled heating/cooling apparatus located after the tin bath and before the cooling conveyor of a float glass production line. Re-annealing is the process of removing objectionable stresses in glass by re-heating to a suitable temperature followed by controlled cooling. Annealing In the manufacturing of float glass and obscure glass, it is the process of controlled cooling done in a lehr to prevent residual stresses in the glass. This is the normal cuttable glass that is generally available. Technically, the stress condition of ordinary glass which is glass that can be cut and processed. Annealed Glass Glass cooled gradually during manufacture in an annealing operation to reduce residual stresses and strains that can occur during cooling. Ambient Temperature The surrounding temperature existing at any given time. Airspace The space in the cavity between two glass panes in an insulated glass unit. AGWA - Australian Glass & Window Association - The peak association representing companies covering window manufacturers, glass manufacturers, glass processors, merchants, glaziers and suppliers of supporting machinery, services and materials. AFRC - Australian Fenestration Rating Council - the Australian body which manages the performance ratings of various glass types. Acid Etching The process of decorating glass, which involves the application of hydrofluoric acid to the glass surface. Absorption That portion of total incident radiation that is absorbed by the glass and subsequently re-radiated either outside or inside. Abrasion Resistance The inherent ability of a coating or substrate to resist degradation or destruction by friction. A Abrasion A wearing, grinding or rubbing away by friction.
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