Polished plate


Polished plate

Polished plate is a type of hand-blown glass. It is produced by casting glass onto a table and then subsequently grinding and polishing the glass. This was originally done by hand, and then later by machine. It was an expensive process requiring a large capital investment. [cite web | title=Hand-blown glass: manufacturing process | work=London Crown Glass Company | url=http://www.londoncrownglass.co.uk/Manufacturing.html | accessdate=December 30 | accessyear=2005]

Other methods of producing hand-blown window glass included: broad sheet, blown plate, crown glass and cylinder blown sheet. These methods of manufacture lasted at least until the end of the 19th Century. The early 20th Century marks the move away from hand-blown to machine manufactured glass such as rolled plate, machine drawn cylinder sheet, flat drawn sheet, single and twin ground polished plate and float glass.

The Frenchman, Louis Lucas de Nehou, in 1688, in conjunction with A. Thevart, succeeded in perfecting the process of casting plate-glass. Mirror plates previous to the invention had been made from blown "sheet" glass, and were consequently very limited in size. De Nehou's process of rolling molten glass poured on an iron table rendered the manufacture of very large plates possible. [Encyclopedia Britannica 11th edition (1911)]

In 1773 English polished plate (by the French process) was produced at Ravenhead.

By 1800 a steam engine was used to carry out the grinding and polishing of the cast glass.

References


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Look at other dictionaries:

  • Polished — Pol ished, a. Made smooth and glossy, as by friction; hence, highly finished; refined; polite; as, polished plate; polished manners; polished verse. [1913 Webster] …   The Collaborative International Dictionary of English

  • plate glass — plate glass, plateglass, adj. 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. [1720 30] * * *       form of glass originally made by casting and… …   Universalium

  • plate glass — plate′ glass′ n. cer a soda lime silica glass formed by rolling the hot glass into a plate that is subsequently ground and polished and used in large windows, mirrors, etc • Etymology: 1720–30 …   From formal English to slang

  • plate glass — n. ground and polished, clear glass in thick sheets used for shop windows, mirrors, etc …   English World dictionary

  • plate glass — noun glass formed into large thin sheets • Syn: ↑sheet glass • Hypernyms: ↑sheet, ↑flat solid • Hyponyms: ↑cover glass, ↑cover slip, ↑pane, ↑ …   Useful english dictionary

  • plate — I. /pleɪt / (say playt) noun 1. a shallow, usually circular dish, now usually of earthenware or porcelain, from which food is eaten. 2. a service of food for one person at the table. 3. an entire course: a cold plate. 4. a plate of sandwiches,… …   Australian English dictionary

  • plate — plate1 plateless, adj. platelike, adj. /playt/, n., v., plated, plating. n. 1. a shallow, usually circular dish, often of earthenware or porcelain, from which food is eaten. 2. the contents of such a dish; plateful. 3. an entire course of a meal… …   Universalium

  • plate — [[t]pleɪt[/t]] n. v. plat•ed, plat•ing 1) a shallow, usu. circular dish from which food is eaten 2) the contents of such a dish; plateful 3) an entire course of a meal served on such a dish: a vegetable plate[/ex] 4) the food and service for one… …   From formal English to slang

  • plate glass — /pleɪt ˈglas/ (say playt glahs) noun a soda lime silica glass formed by rolling the hot glass into a plate which is subsequently ground and polished; used in large windows, mirrors, etc …   Australian English dictionary

  • plate glass — noun Date: circa 1741 rolled, ground, and polished sheet glass …   New Collegiate Dictionary


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