[alt-photo] pd/pt coating solutions
davidashcraft at sti.net
Tue Mar 29 16:14:00 GMT 2011
I was looking at two different formulas and was wondering what others
would use in these situations when using pd/pt 1:1 with the addition
of 2 drops of 5% gold chloride and 3:1 without any gold? I have been
using the premixed solutions from Bostick & Sullivan for all my
printing and want to make the move to mixing my own for the control of
supply and savings.
I have the following formula I got from Dan Burkholder: #1 - 75ml
H2O, 4 grams EDTA, 28.8 grams Ferric Oxalate. #2 - 75ml H2O, 1.1
grams Potassium Chlorate, 4 grams EDTA, 28.8 grams Ferric Oxalate.
Which he states is customized for the 1:3 ratio of pt/pd.
The other is from Dick Arentz's book of Platinum & Palladium Printing
2nd ed.: #1 - 15 grams Ferric Oxalate, 1 gram Oxalic acid, 55ml H2O.
#2 - to 55ml of #1 add .33 grams of Potassium Chlorate.
Any thoughts or recommendations of which to use when or other formulas
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