Method for hardening gelatin and silver halide photographic light sensitive materials employing the method

摘要

A method for hardening gelatin comprises the step of mixing gelatin with a compound represented by the following formula (I), (II) or (III): <CHEM> wherein R1 and R2 independently represent a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group or R1 and R2 combine with each other to form a nitrogen-containing heterocyclic ring; J represents an organic group; l represents an integer of 2 to 5; and m represents an integer of 1 to 5.