| 摘要 |
PURPOSE:To rapidly, certainly and effectively develop a color by selecting an electron donating color forming org. compound and a thermal activator from a specific aromatic sulfonium org. acid salt, an aromatic ammonium org. acid salt and an ammonium org. acid salt and using a compound having a t-butoxyphenyl group as a developer. CONSTITUTION:As an electron donating color forming org. compound and a thermal activator, a compound represented by formula I (wherein R<1> is H, -R, -OR, a halogen atom or a nitro group, X is AsF6, SbF6 BF4, BF6, PF6, ClO4, FeCl4, FeCl4, CF3SO3, RSO3 or RCOO and R is a 1 - 12C alkyl or cycloalkyl group which may be substituted with a hydroxyl group) is used and, as a developer, a compound represented by formula II (wherein Ar in a benzene ring or a naphthalene ring and a substituent t-BuO and Rs<9> may be present at any position on the ring Ar, Rs<9> may be same or different and are H, -R, -OR, -OCOR, -COR, a halogen atom or a nitro group and R is the same group is mentioned above) is used. |
