U of S | Mailing List Archive | alt-photo-process-l | RE: Satista question

RE: Satista question



Loris,

Now I am consulting with my notes. About platinum as a sensitizer.  1 drop of 5% solution for 10 drops of 40% FOA is a good starting point. Less platinum will result in a more brown image, more platinum will shift the tone toward black.

Palladium addition will result in a more brown tone of the print. Palladium will result ina yellow stain on some papers, very difficult to clear.

I have some great looking images on COT320 using gold/FOA as sensitizer. Try 1 drop of 1.5 to 3% solution per 10 drops of 40% FAO. The tone is brown with a hint of purple or sepia, quite different from VDB brown. A side note stated that gold might precipitate making nice coating difficult. Despite that some prints look fantastic.

My clearing bath is a mix of Na4EDTA, citric acid and metabisulfite. Final fix is just about any thiosulfate as satista prints do not bleach in the fixer.

I was wrong about no noble metal in the sensitizer. Long exposures with just plain FAO and developmnet will result in a low contrast image.

Humidity is a variable, but my practice is to dry with a heat before exposure or for storage. I kept dry and sensitized papers (with FAO and Pt) for weeks before exposure. No apparent change. Hope that helps

Marek


From: Loris Medici <mail@loris.medici.name>
Reply-To: alt-photo-process-l@usask.ca
To: alt-photo-process-l@usask.ca
Subject: Satista question
Date: Mon, 19 Mar 2007 14:32:44 +0200

Hi all, I have a question for Satista printers (Marek M? Philippe A? ...?):
 
I want to try Satista prints for sake of economy -> I have little Pt and Pd on hands (which I can't obtain in Istanbul - have to import; I real PIA with current customs regulations) but I can buy AgNO3 and K[AuCl4] locally - at very low cost... Question is: Do I strictly need any Pt or Pd salt for making Satista prints (I guess they fuction as catalysts rather than image-forming substances)? Can I make good Satista prints w/o using any noble metal salt, by just using Ammonium Iron(III) Oxalate as sensitizer and AgNO3 as developer?
 
Thanks in advance,
Loris.
 



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