Patent ID: 11926745
Assignee: SUN CHEMICAL CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 1:
2. The water-based liquid black ink composition of claim 1, wherein the water, biochar pigment, and rosin are provided as a mixture of:
(a) 50 wt % to 70 wt % of a black pigment dispersion, based on the total weight of the water-based liquid ink composition, wherein the black pigment dispersion comprises:
i. 10 wt % to 40 wt % of biochar, based on the total weight of the black pigment dispersion; and
ii. 5 wt % to 20 wt % of a mixing vehicle, based on the total weight of the black pigment dispersion, wherein the mixing vehicle comprises:
(1) 10 wt % to 30 wt % water, based on the total weight of the mixing vehicle; and
(2) 10 wt % to 30 wt % rosin adduct, based on the total weight of the mixing vehicle; and

(b) an additional 30 wt % to 50 wt % of the mixing vehicle, based on the total weight of the water-based liquid black ink composition.