Multicolor ink set and ink jet recording method

Compositions: coating or plastic – Coating or plastic compositions – Marking

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106 3128, 106 3148, 106 3149, 106 315, 106 3152, 106 319, C09D 1102

Patent

active

060334630

ABSTRACT:
A multicolor ink set includes a black ink including at least a water-insoluble coloring material in which a carboxylic acid structure or a carboxylate salt structure is exposed to the surface, water, and a water-soluble organic solvent, and having a surface tension at 20.degree. C. of from 30 to 60 mN/m, and a color ink including at least one or more water-soluble coloring material selected from cyan, magenta and yellow, water, and a water-soluble organic solvent, having a surface tension at 20.degree. C. of from 20 to 50 mN/m and lower than that of the black ink, and 50% by weight or more of the water-soluble coloring material has a solubility in water at 20.degree. C. of 10% by weight or less.

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patent: 5185034 (1993-02-01), Webb et al.
patent: 5198023 (1993-03-01), Stoffel
patent: 5221334 (1993-06-01), Ma et al.
patent: 5273573 (1993-12-01), Kappele
patent: 5342440 (1994-08-01), Wickramanayake
patent: 5451251 (1995-09-01), Mafune et al.
patent: 5624484 (1997-04-01), Takahashi et al.
patent: 5853465 (1998-12-01), Tsang et al.

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