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  1. 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. Plaster of paris does not generally shrink or crack when dry, making it an excellent medium for casting ...

  2. en.wikipedia.org › wiki › PlasterPlaster - Wikipedia

    History. Plaster was first used as a building material and for decoration in the Middle East at least 7,000 years ago. [citation needed] In Egypt, gypsum was burned in open fires, crushed into powder, and mixed with water to create plaster, used as a mortar between the blocks of pyramids and to provide a smooth facing for places.

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  4. “It Is An Astonishment To Be Alive” Baillie Gifford prizewinner Katherine Rundell describes how John Donne’s life force captivated her; actor and playwright Wallace Shawn surveys a lifetime of writing essays

  5. Oct 12, 2022 · Microsoft pleaded for its deal on the day of the Phase 2 decision last month, but now the gloves are well and truly off. Microsoft describes the CMA’s concerns as “misplaced” and says that ...

  6. en.wikipedia.org › wiki › Lime_plasterLime plaster - Wikipedia

    Lime plaster is a type of plaster composed of sand, water, and lime, usually non-hydraulic hydrated lime (also known as slaked lime, high calcium lime or air lime). Ancient lime plaster often contained horse hair for reinforcement and pozzolan additives to reduce the working time.

  7. Oct 29, 2018 · Until the 1970s, the most common type of cast was made with plaster of paris. This involves mixing white powder with water to form a thick paste.

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