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Organisationally, all domestic gypsum activities were consolidated in the British Gypsum subsidiary and the parent company was BPB Industries. BPB had also acquired the main paper supplier in 1953 – the Aberdeen firm of C. Davidson. [citation needed] The post-war period saw extensive overseas investment through subsidiaries and associates.
Gypsum Barrow upon Soar: Leicestershire: British Gypsum: 1987–present Output is used for plasters, renders etc. [1] [2] Boulby Mine: Potash/Polyhalite, rock ...
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO 4 ·2H 2 O. [4] It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster , drywall and blackboard or sidewalk chalk .
Various sized cuts of 1 ⁄ 2 in (13 mm) drywall with tools for maintenance and installation . Drywall (also called plasterboard, dry lining, [1] wallboard, sheet rock, gib board, gypsum board, buster board, turtles board, slap board, custard board, gypsum panel and gyprock) is a panel made of calcium sulfate dihydrate (), with or without additives, typically extruded between thick sheets of ...
A gypsum block is made of gypsum plaster and water. The manufacturing process [1] is automated at production plants where raw gypsum (CaSO 4 ·2H 2 O) is ground and dried, then heated to remove three-quarters of the bound water and thus transformed into calcium sulfate hemihydrate (CaSO 4 ·½H 2 O), also known as gypsum plaster, stucco, calcined gypsum or plaster of Paris.
Plaster was first used as a building material and for decoration in the Middle East at least 7,000 years ago. 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 wall facing.
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It was originally owned by John Howe & Co. before being transferred in 1910 to the Carlisle Plaster & Cement Company and later to British Gypsum in 1953. [ 8 ] [ 9 ] Cocklakes mine was also the first place to manufacture plasterboard in the United Kingdom, despite workers initially attempting to separate the paper from the plaster.