U of S | Mailing List Archive | alt-photo-process-l | RE: Ferric Oxalate or Ferric Ammonium Oxalate

RE: Ferric Oxalate or Ferric Ammonium Oxalate


Which metal salts are you using with AFO?


> -----Original Message-----
> From: Loris Medici [mailto:mail@loris.medici.name] 
> Sent: Thursday, November 02, 2006 10:10 PM
> To: alt-photo-process-l@usask.ca
> Subject: RE: Ferric Oxalate or Ferric Ammonium Oxalate
> Hi Eric,
> I haven't done prints with FO other than few Kallitype tests 
> so I can't share personal experience w/ it as a sensitizer 
> for Pt/Pd salts but I'm quite sure that my prints don't 
> exhibit any haze and/or highlight fogging and/or low 
> contrast. Probably yours is a paper/clearing and/or negative 
> DR problem - my usual coating mix gives me 29 steps in the 
> 31-step tablet for instance (in other words my usual negative 
> DR is log 2.9!).
> I'm currently using the same AFO sensitizer that I mixed 
> about 10 months ago and it still works well without any 
> fogging and/or speed change or other negative effect. IME AFO 
> is quite stable even when in solution - you can almost think 
> that it keeps indefinitely "especially when compared to FO".
> Regards,
> Loris.