Imaging media capable of displaying sharp indicia

Details Imaging media capable of displaying sharp indicia Imaging media capable of displaying sharp indicia

1982-02-12

1983-11-29

Hess, Bruce H.

Coating processes

Transparency or translucency increased

427146, 427180, 427203, 427245, 427246, 427261, 428195, 428206, 4283159, 4283175, 4283179, 4283211, 428338, B05D 500, B32B 326, B41M 500

Patent

active

044180985

ABSTRACT:
Improved sheet material of the type where a base sheet is provided with an opaque microvoid-containing layer which can be locally transparentized by applying a colorless liquid which is a non-solvent for the layer. Indicia remain more sharply defined by including in the layer an organic polymer which jellifies in the presence of the liquid and blocks lateral migration.

REFERENCES:
patent: 2299991 (1942-10-01), Kallock
patent: 2854350 (1958-09-01), Phillpotts
patent: 3031328 (1962-04-01), Larson
patent: 3247006 (1966-04-01), Hoge et al.
patent: 3298895 (1967-01-01), Plambeck, Jr.
patent: 3684551 (1972-08-01), Seiner
patent: 4064304 (1977-12-01), Fujita et al.
patent: 4252601 (1981-02-01), Ceintrey
patent: 4299880 (1981-11-01), Arens
Ind. Eng. Chem., Prod. Res. Develop., vol. 13, No. 1, 1974, Washington, DC, (U.S.), J. J. Clancy: "Microvoid Coatings in Graphic Arts Applications, A Patent Survey", pp. 30-33.

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