| 摘要 |
PURPOSE:To enhance developed color intensity, to intensify absorption from a visible region to a near infrared region and to stably develop a color regardless of the change of acidity and basicity by adding an aromatic amine derivative represented by a predetermined general formula and an inorg. compd. having both of acid properties and oxidizing capacity. CONSTITUTION:An aromatic amine derivative represented by formula I (wherein R<1> and R<4> are a substituted or non-substituted aryl group, R<2> and R<3> are a hydrogen atom, a lower alkyl group or a substituted or non-substituted aryl group and X is a substituted or non-substituted arylene group), for example, N'-diphenyl-O-phenylenediamine and a heteropoly compd. as an inorg. compd having acid properties and oxidizing capacity or a metal salt thereof, for example, sodium phosphomolybdate are added to form a color forming recording material. By this constitution, the aromatic amine derivative can be efficiently converted to a color developing aluminum compd. and high absorption intensity and high fastness can be obtained within a range from a visible region to a near infrared region. |
