Tin toner will produce a purplish black color on bromide
prints and sepia tones on chloride prints. Prints must
first be bleached.
Bleach
Potassium Bromide 13 gm
Potassium Ferricyanide 35 gm
Water to make 1000 cc
Toner
Stannous Chloride 10 gm
Water 100 cc
To this add 70 cc of 10% Potassium Hydroxide solution
and agitate untill the precipitate is dissolved. Then
add 80 cc of water.
BTW there are also some Uranium toners. I have worked with
several of these and produced some interesting results.
Robert W. Schramm
Dept. of Physics or Art
West Liberty State College
schrammr@wlsvax.wvnet.edu