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US 4,959,661 AGranted
Ink-jet printing process
AssigneeOlin Hunt Specialty Products Inc.
InventorsGalina P. Buxton, Harshad M. Shah
Life of this patent
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Abstract
A process for applying an ink-jet printing ink comprising the steps of: (a) preparing an aqueous Newtonian dispersion containing acidic or neutral carbon black or pigments and a surfactant; (b) removing all aggregates larger than 5 microns; and (c) ink-jet printing said dispersion onto a receptor substrate.
Claims13
A process for applying an ink-jet printing ink comprising the steps of:
- (a) preparing an aqueous Newtonian dispersion containing:
- (1) about 0.01% to about 5.0% by weight, based on the weight of the dispersion of particulate materials selected from the group consisting of an acidic or neutral carbon black and pigments, said particulate material, having an average particle size of less than about 3.0 microns in said dispersion;
- (2) an effective dispersing amount of an anionic, cationic, or nonionic surfactant which is compatible with said carbon black or pigment;
- and said dispersion having a surface tension of greater than 35 mN/m and a viscosity in the range of 1-10 mNS/m.sup.2 and a pH of 8 to 11;
- (b) removing all aggregates larger than 5 microns;
- and
- (c) ink-jet printing said dispersion onto a receptor substrate.
4 more elements
Dependencies are inferred from the claim text.