Aqueous ink compositions and methods for their production

Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...

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106 20A, 106 22B, 106 25R, 106 26R, 106 22F, C09D 1116

Patent

active

056835000

ABSTRACT:
An aqueous ink is provided which comprises a coloring agent, a water-soluble solvent and water, where the amount of gas dissolved therein is less than the amount of gas present at the situation level. Where the aqueous ink composition is used for a writing instrument of ink-free type having a confined ink chamber structure, the writing instrument rarely causes ink leakage and writing defects such as uneven ink density and skips in a drawn line, even if it is allowed to stand at a high temperature or to stand for a long time.

REFERENCES:
patent: 4629748 (1986-12-01), Miyajima et al.
patent: 5547499 (1996-08-01), Kawasumi et al.
patent: 5561175 (1996-10-01), Imagawa

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