10 gr.gelatin dissolves in 360cc warm distilled water, mix in 32 gr.
potassium bromide and 8 gr. potassium iodide warm it up to 55 C and hold it
there.
Dissolve 40 gr. silver nitrate in 400 cc of distilled water. Stir this into
the first solution while keeping the temperature at 55 C. Add 40 gr.
gelatin . Allow the mixture to cool for a few hrs. When the emulsion has
jelled, shred it throughcheesecloth into 3 liters of room temperature
distilled water. Allow this to stand for three minutes, then pour off the
water. Repeat this several times to wash away the salts. Wash the emulsion
under the running water for fifteen minutes and drain. This emulsion keeps
a long time if refrigerated in a light-tight container. You need to heat it
up before application. This emulsion gives reasonable exposures under the
enlarger and developes in Dektol, fix, etc.
There was a company in U.S.A., called PICCERAMIC, that used to distribute
something similar. I don=B4t know if they exist now. Does anyone on the list
know about that firm? They used to sell ready made kits for photoclay
decorations.
Galina. (galina@telepost.no)