| 摘要 |
<p>A method of controlling the pH of photographic silver halide developer solutions which contain a dihydroxybenzene developing agent and a secondary developing agent which together form a super-additive combination and an amount of sulphite ions sufficient to protect the developing agents from aerial oxidation by producing in the working solution a concentration of at least 10g/litre (as anhydrous sodium sulphite) wherein there is added to the developer solution a reducing agent which releases hydrogen ions during aerial oxidation of the developer solution and which is different from any developing agent of the superadditive combination.</p> |
