Patent ID: 8172378

Claim:
An inkjet ink comprising: a carbon black pigment dispersion; a non-ionic silicone surfactant being about 0.1% to about 1.2% by weight of the inkjet ink; a polymeric dispersant being about 0.5% to about 1.5% by weight of the inkjet ink, the polymeric dispersant comprising a ter-polymer having moieties of methacrylic acid (MAA), poly(propylene glycol)-4-nonylphenyl ether acrylate (NPHPPG), and poly(ethylene glycol)2,4,6-tris-(1-phenylethyl)phenyl ether methacrylate (TRISA); and two or more humectants being about 20% to about 21% by weight of the inkjet ink and selected from the group consisting of 1,2-hexanediol; 1,3-propanediol; glycerol; and tri-ethylene glycol.