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1 Fireproof Cloth
Cotton cloth treated with various chemical solutions is rendered flameproof, but only asbestos is truly fireproof. For fabrics that are not to be washed, sodium tungstate, borax, boric acid, aluminium acetate or sodium silicate are used mixed with some organic salt such as gypsum, chalk, Epsom salts, china clay, alum, etc. For fabrics that are to be washed such as flannelette - A soaking in a solution of sodium stannate and then in a solution of ammonium sulphate, dried and washed, will render the material flameproof. This process forms a more or less insoluble compound on the fibre. Other compounds used are aluminium sulphate and after-treatment with desodium hydrogen phosphate, to form aluminium phosphate on the fibre (see Asbestos cloth)
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