An aminophenol-type developer which gives results similar to metol-hydroquinone but which can he used by some who are subject to metol poisoning.
| Ingredient | Quantity | |
|---|---|---|
| Solution A | ||
| Water | 0.5 | liters |
| Sodium bisulfite | 12.5 | grams |
| Gradol* | 4.5 | grams |
| Hydroquinone | 4 | grams |
| Solution B | ||
| Water | 0.5 | liters |
| Sodium carbonate | 75 | grams |
| Potassium bromide 10% | 2 | mililiters |
| Mix chemicals in order. | ||
* Gradol is the hemisulfate of para-aminophenol and has a molecular weight of 158.14. You can substitute para-aminophenol hydrochloride for the Gradol, use 90% of the amount called for. No need to make any other adjustments. — Gerald Koch
For tray use, dilute 1:1:2 and develop for 4–8 minutes at 18.5°C.