Ink compositions for ink jet recording
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United States of America Patent
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-
Feb 2, 1993
Grant Date -
N/A
app pub date -
Oct 11, 1991
filing date -
Oct 17, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ink composition for ink jet recording, which contains a water-soluble dye, an organic solvent and water, in which the dye is represented by the formula (1) as shown in the state of free acid: D--(SO.sub.2 CH.sub.2 CH.sub.2 SO.sub.3 H).sub.m (1) wherein D represents a dye residue selected from the group of monoazo and polyazo dyes, their complexes with Cr, Fe, Co and Cu, copper and nickel phthalocyanine dyes, anthraquinone dyes, dioxazine dyes, and formazane complex dyes, and m represents an integer of 1, 2, 3 or 4, and which is superior in its stability during preservation and while being used, thermal stability, image clearness, water resistivity, light fastness, etc.
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