| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a security ink not requiring the time for discoloration when irradiation of light is stopped and having high security performance. <P>SOLUTION: The security ink includes a photochromic compound represented by formula (1) (wherein R<SB>A</SB>and R<SB>B</SB>represent a 1-20C linear or branched alkyl group, an alkylamino group and a 2-20C linear or branched alkoxy group, and k, l, m and n each represent an independent integer of 1-5), and a support material containing a resin. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
