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.
