plate glass

plate glass

noun
a soda-lime-silica glass formed by rolling the hot glass into a plate that is subsequently ground and polished, used in large windows, mirrors, etc.

Origin:
1720–30

plate-glass, plateglass, adjective
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World English Dictionary
plate glass
 
n
glass formed into a thin sheet by rolling, used for windows

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Encyclopedia Britannica
Encyclopedia

plate glass

form of glass originally made by casting and rolling and characterized by its excellent surface produced by grinding and polishing. Plate glass was first made in the 17th century in France, after which several improvements in the original batch technique culminated in the Bicheroux process (1918), in which the glass was received by power-driven rollers that then delivered it in thinner sheets of greater length to be sheared into sections and annealed (heated, then cooled, to make it less brittle). A continuous process was then developed in which the glass passed through the annealing stage before being cut into lengths, ground, and polished.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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