Infrared-absorbing inkjet ink composition for security document personalization

摘要

An inkjet ink composition comprising: at least one near infrared (NIR) absorbent selected from the group consisting of: metal dithiolene complexes, cyanines, and phthalocyanines in amount of from 0,05% to 5% w/w; gamma-butyrolactone as a solvent in amount of from 1% to 30% w/w; 2-butoxyethyl acetate as a solvent in amount of from 50% to 95% w/w; and vinylchloride-vinylacetate copolymer as a binder in amount of from 0,1% to 5% w/w.