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Transactions of the INDIAN CERAMIC SOCIETY   Vol. 20  1961
Central Glass & Ceramic Research Institute Calcutta 32
S. N. GHOSH AND SUDHIR SEN
Pages : 43-53
DOI : 10.1080/0371750X.1961.10855418
Abstract
Six near white china clays were examined for their colour, following the I.C.I. trichromatic colorimetric co-ordinate system after being fired to come 7 and 13 and the results were correlated with their Fes03 and TiOs contents, determined polarographically. The yellowness factor giving a measure of the off-whiteness of the samples was alsa calculated. The clay having the minimum purity, maximum brightness and lowest yellowness factor was selected for incorporation in a porcelain composition. Different amounts of Fes03 and TiOs were added to this composition and fired to cone 7 and 13. The fired colour of th~ samples were similarly examined. It was observed that Fes03 imparts colour to pprcelain body and its effect becomes prominent in presence of TiO=. In samples comparatively free from Fe,03, TiOt has little effect on colour.
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