Patent ID: 7934823

Claim:
A radiation curable ink comprising: a curable monomer that is liquid at 25° C., a curable wax, and a colorant, wherein the ink has a viscosity of from about 10 5 cP to about 10 7 cP at a temperature of about 50° C. or below, wherein the curable wax is a hydroxyl-terminated polyethylene wax functionalized with at least one curable group selected from the group consisting of a methacrylate, alkene, allylic ether, epoxide and oxetane, or a carboxylic acid-terminated polyethylene wax functionalized with at least one curable group selected from the group consisting of a methacrylate, alkene, allylic ether, epoxide and oxetane, wherein the hydroxyl-terminated polyethylene wax is of the formula CH 3 —(CH 2 ) n —CH 2 OH, where n is from about 16 to about 50, and wherein the carboxylic acid-terminated polyethylene wax is of the formula CH 3 —(CH 2 ) n —COOH, where n is from 14 to about 50.