Patent ID: 8613511

Claim:
An inkjet ink, comprising: a carbon black, a dispersant, water, a wetting agent, wherein the wetting agent comprises trimethylglycine in an amount of more than 10 wt % and equal to or less than 40 wt % of the total amount of the wetting agent, a surfactant, a penetrant, and a resin component, wherein a total number of coarse particles having a particle diameter of 0.5 μm or greater contained in the inkjet ink is 1,000,000/5 μL or less, and wherein the inkjet ink comprises the carbon black in an amount of from 1 wt % to 20 wt %, the wetting agent in an amount of from 10 wt % to 50 wt %, the surfactant in an amount of from 0.01 wt % to 5 wt %, the penetrant in an amount of from 0.05 wt % to 5 wt % and the resin component in an amount of from 0.01 wt % to 7 wt %.