Orient Chemical Industries, Ltd.

Tetsui Akase

Takashi Ono

Tatsuya Yagyu

The present invention provides a disazo salt-forming dye having excellent solubility with organic solvents, especially alcohols and glycols. The present invention thus provides a disazo salt-forming dye represented by the Formula (I): ##STR1## or the Formula (II): ##STR2## wherein Ka.sup.+ represents a cation of an amine which is substituted with at least one linear or cyclic alkyl group or aralkyl group having 6-12 carbon atoms which may be branched or interrupted by oxygen.

Alcohol-soluble dye and ink composition containing the same

A liquid azo dye represented by the formula: ##STR1## (wherein, A stands for a phenylene group which may have a substituent, n is o or 1, Cp is a pyrazolone derivative residue or a naphthol derivative residue, X is --NH-- or --COO-- and R is an alkyl group having 3 to 12 carbon atoms).

Liquid azo dye and ink composition containing the same

The present invention provides a salt forming-type dye represented by the formula: ##STR1## wherein Ka.sup.+ is a C.sub.6-20 amine cation or a basic dye cation, and n is an integer of 1 to 4, which indicates the number of Ka.sup.+. The salt-forming dye can be used in an ink composition.

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Moriguchi, Japan

Tetsui Akase