Got a technical question regarding the following two developers - these are for developing old-style Agfacolor/Orwocolor negative films, and are copied from 'Orwo Rezepte': A901 (Kodalk) - 3.0g Hydroxylamine Sulphate - 1.2g CD1 - 1.4g Potassium Carbonate - 50.0g Sodium Sulphite - 1.0g Potassium Bromide - 0.90g Sodium Hydroxide - 1.6g Stated pH - 11.7 +/- 0.1 A901 (Kodalk) - 5.0g Hydroxylamine Sulphate - 0.8g CD1 - 1.7g Sodium Sulphite - 1.2g Tetrasodium Diphosphate - 14.0g Trisodium Phosphate 12-hydrate - 11.0g Potassium Bromide - 0.90g Potassium Iodide solution (0.1%) - 5.0ml Stated pH - 11.1 +/- 0.1 The first developer is the one indicated for developing Orwo's colour negative cine film, I have an amount of this film to play with/develop. The second developer is the standard one for the 'consumer' NC19/NC21 films. The given time in the first developer for the cine film is 8 mins at 21*C. However, I have plenty of the second developer in kit form so I am using this to process the cine film. The trouble is, to get a reasonable density in the negative it takes around 22 minutes at 24*C -rather longer than the stated time for the 'correct' developer! Is this because the cine film developer is more active because of its higher pH, or because its other ingredients give it different properties? Is there any way I could easily modify the developer? Could I add NaOH to raise the activity of the standard consumer developer? If I could easily obtain raw CD1, I would simply make up the correct stuff - but I haven't had any luck sourcing any yet so need to work with what I have! Any input from the experts here would be much appreciated.