Record material carrying a color developer composition

Details Record material carrying a color developer composition Record material carrying a color developer composition

1983-04-01

1984-03-06

Hess, Bruce H.

Textiles: manufacturing

428329, 428331, 428341, 428342, 428404, B41M 516, B41M 518, B41M 522

Patent

active

044350040

ABSTRACT:
A color developer for use in a pressure- or heat-sensitive record material comprises a particulate amorphous hydrated silica/hydrated alumina composite in which the hydrated silica and hydrated alumina are chemically bound, in which hydrated silica predominates, in which the mean alumina content on a dried weight basis is at least 7.5%, based on the total weight of silica and alumina, and in which the surface area is below 300 m.sup.2 g.sup.-1. The composite may be metal-modified.

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Japanese Patent Publication, 38-22819, (10-28-63).
Japanese Patent Publication No. 43-10091, (Saito), (4-25-68).
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Japanese Patent Publication No. 44-2193, (1/69).
Japanese Patent Publication No. 52-32716, (3/67).

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