Patent ID: 6106110
Filing Date: 2000-08-22
Classification: B41J,B41M,C09D

Abstract:
A thermal ink jet printer ink cartridge comprising a container for storing ink and a thermal ink jet ink composition stored therein, wherein said thermal ink jet ink composition is a colorless thermal ink jet ink composition comprising:a) a carrier liquid comprising water; andb) a latent image recording material comprising a first component A of a color reacting pair A+B;and wherein information printed on a substrate with said colorless thermal ink jet ink composition is invisible to an unaided human eye in visible light and undecipherable to an unaided human eye in infrared light and ultraviolet light, but is reactable with an activating composition comprising a second component B of said color reacting pair to produce a colored reaction product A+B which is visible to an unaided human eye in visible light.