Method of hardening gelatin and photographic light-sensitive material

A photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer with the photographic light-sensitive material having one hydrophilic colloid layer containing gelatin and/or a gelatin derivative hardened with a compound of the following general formula (I):

• ##STR5## wherein a and d each represents 1 or 2;
• b and c each represents 0, 1 or 2 with the proviso that both b and c are not simultaneously 0;
• R represents a divalent group selected from the group consisting of a cyclic hydrocarbon group having 6 to 12 carbon atoms, an acyclic hydrocarbon group having 1 to 8 carbon atoms, a --CH.sub.2 OCH.sub.2 -- group, a --(CH.sub.2 CH.sub.2 O).sub.2 CH.sub.2 CH.sub.2 -- group, a --CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.2 -- group and a ##STR6## group;
• and is 0 or 1.