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Beers Formula
The Beers formula: -
Bath A Water 750ml at 52ºC Metol 8g Sodium Sulphite 23g Sodium Carbonate 21g Potassium Bromide 11.0ml (10% Solution) Water to make 1litre Bath B Water 750ml at 52ºC Hydroquinone 8g Sodium Sulphite 23g Sodium Carbonate 27g Potassium Bromide 22.0 (10% Solution) Water to make 1litre All chemicals are anhydrous. The above can be mixed in various ratio's of A & B to create a single bath developer with differing contrasts. For use as a two bath developer John Blakemore suggests the following: - Lowest Contrast 1 Part A + 1 Part water (no Part B) Highest Contrast 7 Parts B + 1 Part A (no water) Varying the time the print is in each bath will allow fine tuning of the contrast With thanks to John Blakemore's "Black and White Photography Workshop" and "The Darkroom Cookbook". John has quite detailed information regarding this developer in his book, if you are interested in this formula I recommend that you read it.
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Cheers, Barry Last edited by Barry; 10th January 2009 at 11:03 PM. |
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