Alumina Hydrate

A white, inorganic compound used as a white pigment in printing inks. Alumina hydrate (chemical composition Al2O3.O-3SO3.3H2O) is mined from bauxite, is highly transparent, and is used as an extender pigment in lithographic and screen printing inks. It is chemically resistant to most substances, with the exception of dilute hydrochloric acid. It also improves the flow of lithographic inks and the gloss of a variety of other types of inks. (See also White Pigments.)

Also known as Light Alumina Hydrate, Lake White, and Transparent White ('CI Pigment White 24 No. 77002').

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