Enhancement of iridescent colors to provide vivid recording colo

Details Enhancement of iridescent colors to provide vivid recording colo Enhancement of iridescent colors to provide vivid recording colo

1976-01-16

1977-04-12

Douglas, Winston A.

Compositions: coating or plastic

Coating or plastic compositions

Carbohydrate or derivative containing

427214, 427336, 428324, 428404, 428363, C09C 128

Patent

active

040173267

ABSTRACT:
Iridescent pigments, of the type which comprise colorless micaceous substrates having thereon at least one overcoating of an essentially transparent material with a refractive index over about 2.0, can be enhanced in coloration by applying to them a solution of a coloring matter which possesses an absorption band complementary to the interference reflection color of the pigment, and which thereby absorbs that complementary color. The resulting vivid intensity of the iridescent coloration is far out of proportion to the concentration of the coloring matter and to the intensity of the absorption band. The enhanced colors are useful in novel colorants, printing inks, recording systems, and copy papers.

REFERENCES:
patent: 3311485 (1967-03-01), Duwell
patent: 3481663 (1969-12-01), Greenstein

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