From: Halvor (halvorb@mac.com)
Date: 02/06/02-08:36:48 PM Z
Hi List
I have been using this formula for making ferric Oxalate for Platinum
printing,Its maybe a bit safer / simpler than the Hydrogen peroxide
variety. Got it from a swedish handbook for alternative processes, where it
was called Dr Bovins Ferric Oxalate process.
Oxalic Acid C2H2O4*2H2O 1g
Sodium Oxalate C2O4 Na2 13g
Ferric III Nitrate Fe(NO3)3*9H2O 26g
Water 55 ml.
to be mixed in safelight, and in listed order, then given at least 12 hours
before use.
This works directly as the ferric oxalate solution in Pt/Pd printing,
Potassium Chlorate can be added for contrast control.
I have not tried any other methodes, and wonder what is the role of this
solution in the platinum process apart from providing Fe3, do the different
methodes for making ferric oxalate give different results in the print ? Or
is (From a naive point of wiev) ferric oxalate ferric oxalate ?
Halvor Bjoerngaard
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