RE: Ferric Oxalate or Ferric Ammonium Oxalate
Loris, I believe it is two fold. That ammonium platinum salt can get to a .7M solution just like the ammonium palladium concentration that he suggest along with a 1.4 M AFO so that your solution is balanced. Eric Neilsen Photography 4101 Commerce Street Suite 9 Dallas, TX 75226 http://e.neilsen.home.att.net http://ericneilsenphotography.com Skype ejprinter > -----Original Message----- > From: Loris Medici [mailto:mail@loris.medici.name] > Sent: Friday, November 03, 2006 4:16 PM > To: alt-photo-process-l@usask.ca > Subject: RE: Ferric Oxalate or Ferric Ammonium Oxalate > > Oops! Potassium Oxalate is soluble!!! > > I don't remember exactly but Mike told me that K metal salts and AFO will > cause formation of an insoluble salt which incorporates K and Oxalate (and > possibly something else)... In this correspondence, the context was > Chrysotype but I think this is applicable to Pt/Pd printing also; since he > doesn't use the ordinary K salts, he uses the NH4 salts instead (this > should > hint some problems related with K salts). > > Regards, > Loris. > > -----Original Message----- > From: Loris Medici [mailto:mail@loris.medici.name] > Sent: 04 Kasım 2006 Cumartesi 00:08 > To: 'alt-photo-process-l@usask.ca' > Subject: RE: Ferric Oxalate or Ferric Ammonium Oxalate > > ...My understanding is that Mike doesn't like K salts because it may cause > forming of Potassium Oxalate which is insoluble, therefore will cause a > gritty sensitizer...
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