Ifibre yeglasi yazalwa ngeminyaka yoo-1930.Luhlobo lwemathiriyeli ye-inorganic non-metallic eveliswa yi-pyrophyllite, isanti ye-quartz, i-limestone, i-dolomite, i-calcite, i-brucite, i-boric acid, i-soda ash kunye nezinye izinto eziphathekayo zekhemikhali.Inobunzima obulula, amandla aphezulu, ukumelana nobushushu obuphezulu kunye nokuphantsi, i-corrosio ...
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