Solution A: Ferric Ammonium Citrate 68 gm.
Oxalic Acid 1.3 gm.
Water to make 250 cc.
Solution B: Potassium Ferricyanide 23 gm.
Oxalic Acid 1.3 gm.
Ammonium Dichromate 0.5 gm.
Water to make 250 cc.
Results are uninviting. I have prefered make the kallitypies that I have
put in a blue toner.
Results are very good and I have been able to have a good control of the
tonality.
However, Thank you for the formula.
if you have some others, I am interesting...
Mark