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Lehr (glassmaking) — A lehr is a temperature controlled kiln for annealing objects made of glass. The name derives from the German verb lehr meaning to learn and is cognate with the English lere also meaning to learn or acquire knowledge of (something)Shorter Oxford… … Wikipedia
industrial glass — Introduction solid material that is normally lustrous and transparent in appearance and that shows great durability under exposure to the natural elements. These three properties lustre, transparency, and durability make glass a favoured… … Universalium
Dealkalization — is a process of surface modification applicable to glasses containing alkali ions, wherein a thin surface layer is created that has a lower concentration of alkali ions than is present in the underlying, bulk glass. This change in surface… … Wikipedia

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