Method to reduce corrosivity of photographic processing effluent

摘要

This relates to a method of rendering a used photographic processing solution less corrosive to low carbon steel comprising:taking at least a used photographic processing solution containing a color developing agent and a used photographic processing solution containing a bleaching agent;delivering the used photographic processing solutions to a collection vessel to form a used photographic processing composition; andadjusting the pH of the used photographic processing composition to 6.5 to 11.