Compositions: coating or plastic – Materials or ingredients
Patent
1985-02-15
1987-04-28
Clingman, A. Lionel
Compositions: coating or plastic
Materials or ingredients
106288Q, 106309, C04B 1400
Patent
active
046611649
ABSTRACT:
A method of increasing the whiteness of a mineral filler, such as limestone, having a natural yellow tint, including the grinding of the limestone to a pulverulent size and introducing into the limestone, preferably while it is being ground, a blue pigment in an amount sufficient to optically transform the natural yellow tint to a predetermined degree of whiteness.
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"Fillers, Filters and Absorbents", Industrial Minerals and Rocks, Society of Mining Eng. of the American Institute of Mining, Metallurgical and Petroleum Eng. Inc., 1983.
Clingman A. Lionel
Franklin Industries, Inc.
Lackey Harrington A.
Thompson Willie J.
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