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  1. Aug 22, 2022 · plaster of paris. plaster of paris, quick-setting gypsum plaster consisting of a fine white powder (calcium sulfate hemihydrate), which hardens when moistened and allowed to dry. Known since ancient times, plaster of paris is so called because of its preparation from the abundant gypsum found near Paris.

  2. Talk:Plaster of Paris. Plaster of Paris has been listed as a level-5 vital article in Technology. If you can improve it, please do. This article has been rated as Redirect-Class. Architecture portal. This redirect is within the scope of WikiProject Architecture, a collaborative effort to improve the coverage of Architecture on Wikipedia. If you ...

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  4. Apr 25, 2015 · Gypsum plaster, or plaster of Paris, is produced by heating gypsum to about 300 °F (150 °C): [2] CaSO4·2H2O + heat → CaSO4·0.5H2O + 1.5H2O (released as steam). When the dry plaster powder is mixed with water, it re-forms into gypsum.

  5. May 18, 2018 · plaster of Paris (POP) n. a preparation of gypsum (calcium sulphate) that sets hard when water is added. It is used in dentistry and orthopaedics for preparing plaster casts. Hahn, Reynaldo Hahn, Reynaldo Hahn, Reynaldo, Venezuelan-born French conductor, music critic, and composer; b. Caracas, Aug. 9, 1874; d.

  6. Plaster of paris is prepared by heating calcium sulfate dihydrate, or gypsum, to 120°–180° C (248°–356° F). With an additive to retard the set, it is called wall, or hard-wall, plaster. Used since ancient times, plaster of paris is so called because gypsum was early used near Paris to make plaster and cement.

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