[Alt-photo] Re: Was Sulfamic Argyrotype and toning

[Marek Matusz]

WOW,
 
MY MSITAKE
 
I was using citric acid to acidify the developer, NOT oxalic acid. 
 
I said citric acid in the first sentence and then oxalic acid in the second.
 
Its was CITRIC acid
 
sorry for the typo
 
Marek
 

> Date: Tue, 14 May 2013 10:40:59 +0300
> From: mail at loris.medici.name
> To: alt-photo-process-list at lists.altphotolist.org
> Subject: [Alt-photo] Re: Was Sulfamic Argyrotype and toning
> 
> Hi Marek, I'm glad that you like the results with Argyrotype on sulfamic
> acid treated FAEW/SP. Which surfactant were you using with FAEW/SP and how
> much? This paper has a lot of sizing / a very hard surface, therefore IME
> it needs relatively much more surfactant to give nice results w/o bleeding.
> Oxalic acid development bath is interesting, AFAIK, Mike Ware recommends a
> very mild citric acid solution for that job. I'll try it if I happen to
> experience problems with citric acid. (OTOH, citric acid never let me down
> in the last 8-9 years...)
> 
> Waiting for your images! :)
> Loris
> 
> 
> 2013/5/14 Marek Matusz <marekmatusz at hotmail.com>
> >
> > All, I did another batch of argyrotypes and I like the process even more.
> I acidified
> > the paper with sulfamic acid. I used Fabriano artistico soft press and
> Rising
> > Stonehenge. Both papers printed beautifully, although somewhat different
> brown
> > (FASP) to red-brown (RS) after development. The prints are still wet, and
> I am
> > not sure if the tones will stay after drying. Gold toning with
> gold/thiocarbamate
> > toner produced beautiful split toning for shorter toning times and then
> blue-black
> > very dark prints for very long toning.Palladium toned print produced a
> brown-black
> > tone very different from untoned print, although DMAX was lower then
> expecte,
> > it need s to be exposed for longer time. The most exciting was platinum
> toning
> > with gradual shift towards brown and black brown tones without much split
> shift,
> > but noticeable increase in DMAX from untoned print. Nice clean highlights
> so far.
> > I am using two baths of citric acid with some silver sulfamate sensitizer
> to neutralize
> > chlorides in the tap water. The baths are 5g of oxalic acid/liter with a
> few drops of
> > silver sulfamate in the first bath. I made 6 prints (8x11) without
> changing that baths.
> > I am so excited about this process and the sulfamic acid acidification. I
> will post
> > some pictures tomorrow once the prints are dry. I also tried sulfamic acid
> > acidification of the first bath and it bleached the print very nicely,
> not too fast so it
> > can be perhaps a very good handle for bleaching prints that are too dark.
> The thio
> > fixing resulted in a slight increase in DMAX and a slight tone shift
> toward brown.
> > In the 5 minute toning I did not see any loss of DMAX.
> >
> > Marek
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