abstract |
The present disclosure provides a white ink including an aqueous ink vehicle, from 5 wt% to 50 wt% of a white metal oxide pigment having an average particulate size from 100 nm to 2,000 nm, from 0.02 wt% to 2 wt% of an anionic low molecular weight polymer having a weight average molecular weight of 3,000 Mw to 50,000 Mw and an acid number higher than 100 mg KOH/g based on dry polymer weight, and from 2 wt% to 30 wt% of latex particulates having a glass transition temperature from 0 C to 130 C. Furthermore, the white metal oxide pigment is dispersed by a non-ionic or predominantly non-ionic dispersant having an acid number not higher than 100 mg KOH/g based on dry polymer weight. |