| 摘要 |
PURPOSE:To improve the stability of a color developing soln. and to suppress an increase in stains and change of photosensitivity by incorporating respectively specific hydrazines and arom. polyhydroxy compds. into the developing soln. CONSTITUTION:At least one kind of the hydrazines expressed by the formula I and at least one kind of the arom. polyhydroxy compds. expressed by the formula II are incorporated into the color developing soln. In the formula, R<1>-R<3> denote a hydrogen atom, alkyl group, etc.; R<4> denotes a hydrogen atom, hydroxy group, etc.; X<1> denotes a bivalent group, n denotes 0 or 1. R<4> denotes an alkyl group, aryl group or heterocyclic group when n=0. In the formula II, Z denotes the atomic group necessary for forming an arom. nucleus. The stability of the color developing soln. is thereby improved and the increase in the stains and the change of the photosensitivity at the time of continuous processing are extremely suppressed. |
