Patent ID: 9505941
Filing Date: 2016-11-29
CPC Classification: B41J,C09D

Claim Text:
1. A method for inhibiting burnt deposit on an inkjet recording head comprising a step of discharging an ink by an action of thermal energy from the recording head, wherein the ink contains self-dispersing carbon black, a polyurethane polymer, and an acryl polymer, wherein the self-dispersing carbon black is at least one of a (i) carbon black in which a phthalic acid group is bonded to the surface of the carbon black, and (ii) a carbon black in which —C wherein an acid value of the polyurethane polymer is 40 mg KOH/g or more, and wherein an acid value of the acryl polymer is 100 mg KOH/g or more to 200 mg KOH/g or less.