Method for preventing the degradation of a hydrophilic colloid solution for silver halide photographic light-sensitive material

A method for preventing the degradation of a hydrophilic colloid solution by the action of bacteria, mold or yeast for a silver halide photographic light-sensitive material, in which the viscosity of the solution thereof has been or is to be increased using an anionic polymer containing an acid group, whereafter said hydrophilic colloid solution is used in a multi-coating process at a speed of about 20 m/min or more, which comprises incorporating into said hydrophilic colloid solution at least one compound represented by the formula (I):

• ##STR6## wherein R.sub.1 represents a hydrogen atom or an alkyl group;
• and R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group and, increasing said viscosity if said viscosity has not already been increased by the addition of said anionic polymer by adding said anionic polymer containing an acid group to said hydrophilic colloid soluton, whereby said degradation is prevented without any adverse effect on viscosity increase.