PURPOSE: To obtain the titled material having less dependency due to the composition of a liquid developer by incorporating specific 2 kinds of compds. to the titled material.
CONSTITUTION: The titled material contains the one kind of the compds. shown by formula I and the one kind of the compds. shown by formula II. In formula I, Z is a non-metal atom necessary for forming 5W6 membered heterocylic ring, L is preferably a bivalent aromatic ring, etc., (m) is 0 or 1, R1, is alkyl group, etc., R2 and R3 are each hydrogen atom, etc., (n) is 0, 1 or 2, X is an acidic anion. In formula II, X is sulfur atom, etc., R1WR4 are each hydrogen atom, etc. The compounding amount of the compd. shown formula I is preferably 0.01W1.0mmol per 1mol of silver halide contd. in the silver halide emulsion layer. The compounding amount of the compd. shown by formula II is preferably 0.1W5mmol per 1mol of the silver halide contd. in the silver halide emulsion layer. As the ratio (mol ratio) of the compounding amounts of the compds. shown by formulas I and II, I/II=0.01W10 is preferable.
OKAZAKI MASAKI
SUGA SHUZO
