Information recording medium

摘要

An information recording medium showing a high light-resistance has a recording layer containing a dye compound having the following formula (IV-2):in which each of Y<2 >and Z<2 >is a group of atoms required for forming a carbon ring or a heterocyclic ring; each of L<6>, L<7>, L<8>, L<9 >and L<10 >is a methine group which may have one or two substituents; M<2+> is an onium ion; and each of m1 and n1 is 0, 1 or 2.