Ink composition with improved lightfastness
AssigneeXerox Corporation
InventorsThomas W. Smith, Kathleen M. McGrane
Life of this patent
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Abstract
Disclosed is an ink composition comprising (a) water and (b) a complex of (i) an anionic dye, (ii) an anionic lightfastness-imparting agent, and (iii) a polyquaternary amine compound.
Claims20
An ink composition comprising (a) water and (b) a complex of (i) an anionic dye, (ii) an anionic lightfastness-imparting agent, and (iii) a polyquaternary amine compound.
A process which comprises (a) incorporating into an ink jet printing apparatus an ink composition comprising (a) water and (b) a complex of (i) an anionic dye, (ii) an anionic lightfastness-imparting agent, and (iii) a polyquaternary amine compound, and (b) causing droplets of the ink composition to be ejected in an imagewise pattern onto a substrate.
A process which comprises (a) incorporating into an ink jet printing apparatus an ink composition comprising (a) water and (b) a complex of (i) an anionic dye, (ii) an anionic lightfastness-imparting agent, and (iii) a polyquaternary amine compound, and (b) causing droplets of the ink composition to be ejected in an imagewise pattern onto a paper substrate.
Dependencies are inferred from the claim text.