[QUOTE=Regular Rod;1059754]I don't think dry Catechol goes off if sealed in a jar. In fact I believe that is one of the characteristics that Jay took into consideration when he was devising OA to last indefinitely.
Did you use Sodium Metabisulphite in your solution A? I think we are supposed to use Sodium Carbonate in Solution B if we use Sodium Metabisulphite and if we use Potassium Metabisulphite in solution A we should use Potassium Carbonate in solution B
Here's how I make up mine after Jay explained to me how I could save on the quantities of distilled water needed:
OBSIDIAN AQUA
Solution A
Distilled Water - 300 ml
Sodium Metabisulphite - 8 g
Catechol - 100 g
Distilled Water to make - 400 ml
Solution B (Concentrate)
Distilled Water - 4 litres
Sodium Carbonate Anhydrous - 1 kilo
Distilled Water to make - 5 litres
Working Solution
Solution A - 1 ml
Solution B - 12.5 ml
Tap Water to make - 500 ml
Try 12 minutes @ 20 degrees C semi-stand to start with. That is 60 seconds gentle agitation followed by 10 seconds gentle agitation every two minutes. A pre-soak in water at 20 degrees C seems to ensure even development quite nicely.
I tried 12 minutes at 20C, agitating every two minutes. Tried twice and got only totally clear negatives, NOTHING! I checked and double-checked the formulae and the mix I used to develop. No mistakes. I used 2.6ml of Solution A, 32.5ml of Solution B added to 1300ml of water. What am I doing wrong. I got the chemicals fresh from Artcraft. Am using sodium rather than potassium.
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