… oxide) either deriving from the natural starting material (bauxites) or added to improve, for example, the hardness of … (hydrated alumina) (Al 2 O 3 . 3H 2 O) is obtained from bauxite (a mixture containing aluminium hydroxide) during …
… Used for stiffening linen or paper; in soldering metals (flux for hard solder); as a flux for enamels; in the manufacture of vitrifiable colours, … borate as an antiseptic, in fire-proofing textiles or as a flux in ceramics, zirconium borate as an opacifier. Natural …
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