SHEET OF WHICH COLOR VANISHES WITH PASSAGE OF TIME AND INK USED FOR THAT

摘要

PPROBLEM TO BE SOLVED: To provide a sheet of which color vanishes with the passage of time, which can be used for a slip, form, recording paper, toy, correspondence, security, gold note, ticket, coupon, document, seal, lot, label, leaflet, direct mail, poster, and the like, and from which a color-developed information can be seen even if its microcapsule is not destroied by giving a stimulation such as the pressure of a pen or typing, and the color-developed information vanishes with time, and to provide an ink used for manufacturing that. PSOLUTION: For the color-vanishing sheet with passage of time 20A, a slow releasing desensitizer-containing micro-capsule ink layer 2 provided by applying the ink containing a slow releasing desensitizer-containing micro-capsule 2A is formed in a specific part on a sheet substrate 1. Information 5 provided by coating ink containing a color forming reagent 3 and a developer 4, is formed on that. PCOPYRIGHT: (C)2004,JPO