Water-soluble dye composition and recording liquid containing th

Details Water-soluble dye composition and recording liquid containing th Water-soluble dye composition and recording liquid containing th

1986-08-11

1988-08-23

Barr, Josephine

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 20, C09D 1102

Patent

active

047658380

ABSTRACT:
A black recording liquid suitable for use in ink-jet recording or as an ink for writing instruments comprises at least two water-soluble dyes and a liquid medium. Each of the dyes satisfies the condition defined by the following expression [I], and a mixture of these dyes satisfies the condition defined by the following expression [II]. ##EQU1## In these expressions, a* and b* are chromaticness indices defined in the CIE 1976 (L*, a*, b*) space, i indicates the ith dye of the dyes used together, and n is an integer of 2 or more.

REFERENCES:
patent: 4239544 (1980-12-01), Strem
patent: 4508570 (1985-04-01), Fujii et al.
patent: 4601756 (1986-07-01), Chiba et al.
patent: 4631085 (1986-12-01), Kawanishi et al.
Patent Abstracts of Japan, vol. 6, No. 158, 8-1982 (C-120)(1036).
Patent Abstracts of Japan, vol. 8, No. 205, 9-1984 (C-243)(1642).
Patent Abstracts of Japan, vol. 8, No. 15, 1-1984 (C-206)(1452).
Patent Abstracts of Japan, vol. 6, No. 208, 10-1982 (C-130)(1086).

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