Digital BW, The Print

Hi All
I have a copy of 'The British Journal Photographic Almanac' 1920 which gives 
formulae for seven different negative reducers. They are Farmers 
(ferricyanide), Belitski's (with Oxalic Acid), Persulphate (just ammonium 
persulphate), Iodine-cyanide (with Potassium Cyanide), Ceric Sulphate (still 
available), Permanganate, Bichromate (potassium), Hyporchlor and Alum (with 
Eau de Javelle - sodium hypochlorite) and 'Eders' which was:
Potassium cyanide....5 gms.
Potassium Iodide.....10 gms
Mercury bichloride...10 gms and
Water .... 1,000cc. It says it reduces slowly, and is non-staining and 
intensely poisionous - try getting that one past health and safety.
There is also 'Baskett's Local Reducer':
Globe metal polish.....2d tin .( old pennies)
Terebene.......2 ozs. (a cold remedy)
Salad oil....2 ozs
'Dense parts of the negative are rubbed down with the reducer applied by the 
finger-tip or with a bit of chamois leather'
Interesting times!

Brian Price