SECURING INK FOR FLEXOGRAPHIC PRINTING AND METHOD FOR FLEXOGRAPHTC PRINTING

摘要

PROBLEM TO BE SOLVED: To provide a securing ink for flexographic printing by means of a near infrared phosphor. ;SOLUTION: This ink for flexographic printing contains a coloring matter and a near infrared fluorescent compound, and can give both multicolor printing containing black curve and security due to near infrared fluorescence to documents to be printed. A printing system in which a plurality of inks for flexographic printing are compounded can conduct printing with any colors along with security due to near infrared fluorescence. This method for printing can employ any pigments having a large infrared absorption in the ink when printing a printed form.;COPYRIGHT: (C)1999,JPO