Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy;Vol.XIX, Nos.1-2

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Whiteness in Colour of Talc

Togari, Kenji

Permalink : http://hdl.handle.net/2115/36684

Abstract

Whiteness in colour of talc is one of the most useful property in commercial uses, and it is used in ceramics and as a filler in paint, paper, and rubber. The present writer has carried out some quantitative studies on the whiteness as one of physical properties with the automatic photo-electric spectrometer. Consequently, whiteness value being calculated by the Hunter equation amounts to 88.9% for the maximum. In general, however, the talc contains the other minerals as impurities, therefore the whiteness in colour of talc decreases from 88.9% to 72.3% with the increase of impurities.

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