Patent ID: 8562121

Claim:
A method of decreasing L*min and reducing stacked haze in a black region of an ink-jet printed image, comprising: ink-jetting at least one ink-jet ink onto an ink-jet ink receptive medium to form a printed medium comprising an image having at least one black region, wherein at least one said ink-jet ink includes a black ink-jet ink comprising: a liquid vehicle, and at least one black azo dye having the formula: wherein X is SO 3 O; R is unsubstituted C 1-4 -alkyl; Q is K + , Na + or Li + , or any combination of those; m is 1 or 2; and n is 1, 2 or 3; and stacking said printed medium, to obtain a printed medium having decreased L*min and reduced stacked haze in said at least one black region, relative to a printed medium printed with an ink-jet ink lacking said at least one black azo dye.