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The development of plasterboard (a sandwich of gypsum plaster between two sheets of paper) dates back to the late nineteenth century in the US. The first patent was granted in 1894 but it was not until an American, Frank Culver, persuaded his new employer, Thomas McGhie and Sons, to buy a plasterboard plant from the US that this new product was introduced to Britain.
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.
The NIFTY Next 50 is a stock market index provided and maintained by NSE Indices. It represents the next rung of liquid securities after the NIFTY 50. It consists of 50 companies representing approximately 10% of the traded value of all stocks on the National Stock Exchange of India. It is quoted using the symbol NIFTYJR. [2] [3]
NSE EMERGE is NSE's new initiative for small and medium-sized enterprises (SME) and startup companies in India. [39] These companies can get listed on NSE without an initial public offering (IPO). This platform will help SMEs and startups connect with investors and help them with the raising of funds. [40]
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Gypsum is a common mineral, with thick and extensive evaporite beds in association with sedimentary rocks. Deposits are known to occur in strata from as far back as the Archaean eon. [16] Gypsum is deposited from lake and sea water, as well as in hot springs, from volcanic vapors, and sulfate solutions in veins.
FCI Aravali Gypsum & Minerals India Ltd. (FAGMIL) is a public sector enterprise in India operating in the field of mining operations since 1952, supplying mineral Gypsum. FAGMIL was separated from the Fertilizer Corporation of India in February 2003.