This formula gives either blue-blacks or rich, neutral tones, depending upon the paper. It
works best with bromide papers.
Water at 125F/52C, 750.0 ml
te, 180.0 g
Hydroquinone, 53.0 g
Phenidone, 2.2 g
Benzotriazole, 1.5 g
A white precipitate will form when the aforementioned ingredients are dissolved in the order
shown. This is normal. This is normal. Allow to cool to about 75F/24C, and then slowly add
the following while stirring:
Sodium hydroxide, 35.0 g
This will clear or almost clear the solution. Then add:
Water to make 1.0 liter
Dilute stock 1:5 with water. For less dramatic cool tones, dilute 1:10 or 1:15. The image will
appear almost immediately after the print is put into the tray. Do not prematurely pull the
print; develop for the full 2 minutes.
The sodium hydroxide is not buffered and the solution will lose activity after 10–15
prints. However, the stock solution will keep for a month or more in a well-stoppered, amber
glass bottle. A good way to make use of this formula is to mix up 1.0 liter, then dilute 250.0 ml
of the stock with 1250.0 ml of water, make 10 prints, mix a fresh batch, and so on. Forty or
more prints can be made in one session in this way.
Altering the amount of benzotriazole will affect the level of fog and print tone.