| 摘要 |
PURPOSE:To obtain a high color forming density by incorporating specific compds. into a color developing soln. CONSTITUTION:The compds. expressed by the formulas I-IV are incorporated into the color developing soln. In the formulas I, II, R<1>-R<3> denote a hydrogen atom, alkyl group, aryl group, etc.; R<4> denotes a hydrogen atom, hydroxy group, hydrazino group, etc.; X<1> denotes a bivalent group; n denotes 0 or 1; R<5>, R<6> denote a hydrogen atom, alkyl group, alkenyl group, etc. In the formula III, IV, R<7> denotes a hydroxyalkyl group, R<8>, R<9>, X<2>, Z<1> denote a hydrogen atom, alkyl group, hydroxyalkyl group, etc.; m denotes 1-6 integer; X<3> denotes a trivalent atom group necessary for completing a condensed ring; R<10>, R<11> denote an alkylene group, arylene group, etc. The sufficient color forming density is obtd. in this way. |
