[Formula D-9] Hydroquinone-Caustic Developer
Stock Solution A
Stock Solution B
Use equal parts of A and B and develop for not more than two minutes at 65° F. (18° C.).
Cold water should always be used when dissolving sodium hydroxide (caustic soda) because considerable heat is evolved. If hot water is used, the solution will boil with violence and may cause serious burns if the alkali spatters on the hands or face. Solution A should be stirred thoroughly when the caustic alkali is added; otherwise the heavy caustic solution Will sink to the bottom.
Wash thoroughly after development and before fixing, or stains and dichroic fog may result.