Patent ID: 7919543

Claim:
An inkjet ink composition, comprising: a) a nitrocellulose polymer in an amount between about 0.1% to about 10% by weight of the inkjet ink composition; b) ethyl lactate in an amount between about 10% to about 90% by weight of the inkjet ink composition; c) at least one organic pigment dispersion, wherein the total amount of the pigment present in the inkjet ink composition is no greater than about 10% by weight of the inkjet ink composition; d) a plurality of additives present in the composition comprising a wetting agent or a surfactant, and a UV absorption agent or a light stabilizing agent, wherein the total amount of additive in the ink composition is no greater than about 10% by weight of the inkjet ink composition: e) at least one reactant in an amount no greater than 70% by weight of the inkjet ink composition, the reactant selected from the group consisting of a triacrylate, diacrylate, triacrylate ester and diacrylate ester; and f) at least one photoinitiator selected from the group consisting of substituted or unsubstituted ketone and phosphine oxide, wherein the inkjet ink composition has a viscosity of about 5 cP to about 20 cP at a jetting temperature in the range of about 40° C. to about 50° C.; wherein the inkjet ink composition has a surface tension below 30 dynes/cm at about 25° C.