Hi Trask. Can you give names for those formulae, and can you pass on title and publisher etc for the books you found them in?


Quote Originally Posted by Trask View Post
Thanks for the formulas, David. I have a few more culled from some photo lab books in French I picked up in Brussels, but they call for exotic components like Diethylparaphenylenediamine sulfite (or sulphate, itís not clear) and hydroxyethyl-o-aminophenol.

Hereís one thatís stated to be a compensating developer:

Sodium Sulphite 40 grams
Potassium Carbonate 40 grams
Glycin 8 grams
Phenidone 0.5 gram
Potassium Bromide 2 grams
Water 1000 ml

Dilute 1:1, average time of development at 20 degrees Centigrade: 8-12 minutes.

Another, somewhat similar, formula is said to be fine grain and come from Ilford:

Sodium Sulphite 90 grams
Sodium Carbonate 2 grams
Borax 2 grams
Glycin 5 grams
Phenidone 0.2 gram
Water 1000 ml

Used straight, average time of development 8 minutes.

An alternate formulation also said to be from Ilford, in a different book, as follows:

Hot water 700 ml
Borax 2 grams

Then, with water at 50 degrees Centigrade, add in order:

Sodium sulphite 70 grams
Sodium carbonate 2 grams
Glycin 5 grams
Phenidone 0.2 gram
Water to bring level to 1000 ml

For a gamma of 0.65, develop 11 minutes at 17-18 deg Cent, or 9 minutes at 18-19 degrees. (NB: no explanation as to why theyíre staying below 20 deg Cent) Further, can be diluted 1:1 and used at 20 deg Cent for 8-9 minutes for slow-speed films.