Record material carrying a color developer composition

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

1983-03-14

1984-07-10

Hess, Bruce H.

Recorders

Record receiver deforming

428329, 428331, 428341, 428342, 428404, 346211, B41M 516, B41M 518, B41M 522

Patent

active

044589220

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 and in which the mean alumina content on a dried weight basis is up to 7.5%, based on the total weight of silica and alumina. The composite may be metal-modified, e.g. with copper.

REFERENCES:
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patent: 2757085 (1956-07-01), Paquin
patent: 3223546 (1965-12-01), Hemstock
patent: 3226252 (1965-12-01), Hemstock et al.
patent: 3330722 (1967-07-01), Amano et al.
patent: 3565653 (1971-02-01), Hemstock et al.
patent: 3736285 (1973-05-01), Miller
patent: 3980492 (1976-09-01), Thompson
patent: 4022735 (1977-05-01), Thompson
patent: 4038097 (1977-07-01), Traxler et al.
patent: 4109048 (1978-08-01), Dessauer et al.
patent: 4218504 (1980-08-01), Yamato et al.
patent: 4289806 (1981-09-01), Sato et al.
Japanese Patent Publication No. 44-2193 (1/1969).
Japanese Patent Publication No. 52-32716 (3/1967).
Japanese Patent Publication, 38-22819 (10-1963).
Japanese Patent Publication No. 42-10091, (Saito) (4-1968).
Japanese Disclosure No. 52-32716, (Sugahara) (3-1977).
Japanese Publication No. 54-20886, (Sugawara et al) (7-1979).

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