From: Sandy King (sanking@clemson.edu)
Date: 09/05/02-08:26:47 PM Z
Judy,
For kallitype the developer is a straight 20% solution of ammonium
citrate. Sodium citrate works also at the same strength solution. You
control contrast with either by adding a few ml of a 5% potassium
dichromate solution directly to the developer, up to about 30ml per
liter at which point the contrat of the solution is such that you
would be able to print negatives meant for silver.
Sandy
>A former student of mine is doing a project in kallitype, starting with
>tests and formulas and papers I had in the file. She wants however to
>mix all her own chemicals...
>
>I had, among other developers, used the Bostick & Sullivan Ammonium
>Citrate developer, sold for platinum I believe. But she hasn't found any
>formula at all based on ammonium citrate & I didn't find any right off.
>Any suggestions?
>
>Judy
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