Patent ID: 8133937

Claim:
An ink-jet ink substantially free of water and volatile organic solvents comprising at least one monofunctional (meth)acrylate monomer, wherein said at least one monofunctional (meth)acrylate monomer comprises phenoxyethyl acrylate; at least one monofunctional N-vinyl amide monomer, wherein said at least one monofunctional N-vinyl amide monomer comprises N-vinyl caprolactam; at least one radical photoinitiator; and at least one colouring agent; wherein the ink has a viscosity of less than 100 mPas at 25° C., and wherein the molar ratio of the at least one monofunctional (meth)acrylate monomer to the at least one monofunctional N-vinyl amide monomer is from 1.2 to 4.0, and further wherein said ink-jet ink has a higher cure speed than a cure speed of an ink-jet ink which comprises only one of the at least one monofunctional (meth)acrylate monomer and the at least one monofunctional N-vinyl amide monomer.