Color developing coating using unrefined clays on paper

Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...

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428411, 428511, 428520, 428537, 428538, 428539, 428454, 106214, 106DIG4, 252168, 282 275, B32B 516

Patent

active

041090497

ABSTRACT:
A color developing coating and coated paper are provided in which a paper sheet is coated with a mixture of dispersing agent, adhesive and a reactive pigment made up of essentially from the group bentonite and montmorillonite admixed with kaolinite, a polyvalent cation and a ligand.

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patent: 2885374 (1959-05-01), Swegney
patent: 3464839 (1969-09-01), Gamble
patent: 3753761 (1973-08-01), Sugahara et al.
patent: 3900216 (1975-08-01), Hayashi et al.
patent: 3963852 (1976-06-01), Baxter
patent: 4010307 (1977-03-01), Camard

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