Receptet på Promicrol kanske är av intresse, om man kan får tag på HEAP Sulfat, jag gjorde en sökning på det och hittade ett företag i HongKong som säljer sånt...
http://www.hkstar.com/~yickvic/
Speed-increasing film developer
Water, 125F/52C 750 ml
2(beta-hydroxyethyl) aminophenol sulphate 6 g
Glycin 1.13 g
Sodium Sulfite (anhydrous) 100 g
Sodium Carbonate (anhydrous) 11.5 g
Sodium Hexametaphosphate 1.7 g
Cold water to make 1L
Mixing instructions: Add chemicals in specified sequence.
Dilution: 1+9, 1+14
Starting point development time: ? mins.
Notes: Promicrol is considered by many to be one of the best speed-increasing developers ever made. Sadly, one of its key ingredients, 2(beta-hydroxyethyl) aminophenol sulphate (aka HEAP sulfate), is no longer in production anywhere in the world. Current commercial products sold under the name Promicrol or claiming to be similar to Promicrol, are not comparable to this formula.