Dye or color developing inorganic pigments

Details Dye or color developing inorganic pigments Dye or color developing inorganic pigments

1974-09-16

1978-06-13

Douglas, Winston A.

Compositions: coating or plastic

Materials or ingredients

106 72, 106308B, 252450, 252454, 427215, 427309, 427399, C04B 3100

Patent

active

040946983

ABSTRACT:
An oxidizing clay for pressure sensitive record materials is provided by treating an acid leached clay with cupric salts.

REFERENCES:
patent: 1650022 (1927-11-01), Mahler et al.
patent: 3219592 (1965-11-01), Hirschler
patent: 3414422 (1968-12-01), Iannicelli et al.
patent: 3691099 (1972-09-01), Young
References cited here but not used in this action are included in that A, B+L teach acid treatment of clay, while M teaches coating clay with a slightly soluble salt.

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