| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an ink or toner used for printed matters or copied pictures capable of preventing forgery in copying by color copying machine. SOLUTION: This ink for protecting forgery or a toner for electrophotography contains a pyridoimidazoquinoxaline derivative expressed by general formula (I) (R1 to R8 are each the same or different, H, a halogen, nitro, cyano, amino, hydroxy, carboxy, carbamoyl, an alkyl which may have substituents, an alkoxy which may have substituents, an alkoxycarbonyl which may have substituents, a mono 1-6C alkylcarbamoyl, a di 1-6C alkylcarbamoyl, an acyl which may have substituents, an aryl which may have substituents or a heterocycle which may have substituents).</p> |
