| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical recording medium excellent in the fastness of a recorded image. <P>SOLUTION: In the optical recording medium having a visible information recording layer in a board, the visible information recording layer includes at least a kind of coloring matter precursors, which can produce a coloring matter, the maximum absorption wavelength of which is varied by nucleophilic reaction. <P>COPYRIGHT: (C)2009,JPO&INPIT |
