Photographic processing composition containing a diaminostilbene derivative and image forming method using the same

A processing composition for a silver halide photographic material, which comprises at least one compound selected from the group consisting of compounds represented by the following general formulae (I) and (II):

• wherein R11 and R12 each independently represents a hydrogen atom or an alkyl group;
• R13 and R14 each independently represents a hydrogen atom, an alkyl group or an aryl group;
• R15 represents an alkyl group having at least one asymmetric carbon atom or a group represented by the following general formula (I-a):
• —CH2O(CH2CH2O)n11H (I-a)
• wherein n11 represents an integer of from 1 to 3;
• R16 represents an alkyl group having at least one asymmetric carbon atom or a group represented by the following general formula (I-b):
• —(CH2CH2O)n12H (I-b)
• wherein n12 represents an integer of from 2 to 4;
• and M1 represents a hydrogen atom, an alkali metal atom, an alkaline earth metal atom, an ammonium group or a pyridinium group, R13 may complete a ring together with R15, and R14 may complete a ring together with R16, respectively:
• wherein R21, R22, R23 and R24 each independently represents a hydrogen atom, an alkyl group or an aryl group;
• R25 and R26 each independently represents an alkyl group having at least one asymmetric carbon atom or a group represented by the following general formula (II-a):
• —(CH2CH2O)n21H (II-a)
• wherein n21 represents an integer of from 2 to 4;
• R27, and R28 each independently represents an alkyl group having at least one asymmetric carbon;
• M2 represents a hydrogen atom, an alkali metal atom, an alkaline earth metal atom, an ammonium group or a pyridinium group;
• R21 and R25, R22 and R26, R23 and R27, and R24 and R28, each pair may be bonded together to form a ring;
• and at least one of R25, R26, R27 and R28 has at least one asymmetric carbon atom and at least one substituent selected from the group consisting of a hydroxyl group, an amino group and a carboxyl group.