Two-color invisible fluorescent ink for anti-counterfeiting by using fluorescent material

摘要

PURPOSE: Provided is an anti-counterfeit and forgery dichroic fluorescent ink comprising a fluorescent ink which radiates different colors at specific wave length(long wave 365 nm, short wave 254 nm) and a colored ink as complementary color. CONSTITUTION: The ink comprises 83-91 wt% of invisible fluorescent ink comprising 3-8 wt% of invisible fluorescent material having long wave(2), 19-40 wt% of invisible fluorescent material having short wave(1), 41-74 wt% of varnish(3), 2-7 wt% of aliphatic solvent having high boiling point, and 2-4 wt% of dessicating agent of manganese or cobalt drier. The invisible fluorescent material having long wave emits a light at 365 nm, and invisible fluorescent material having short wave emits a light at 254 nm. The invisible fluorescent materials having long wave and short wave are selected from the group consisting of LUMILUX CD 402, 702 and 770 respectively.