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

[Serdar Bilici]

Hi Marek,

I am looking forward to see toned argyrotypes. I had similar varieties of
color with different papers. In my tests with Canson Montval  (20C %65RH) I
also had reddish tones, very much like colors of mahogany.

One thing about oxalic acid, a quick search results tell that oxalic acid
will react with silver and silver compounds forming explosive silver
oxalate.I feel like you should re-consider oxalic acid use in silver
processes, not because of explosive warning, but because it reacts with
silver.

Sulfamic acid as a bleacher works very effectively even at %0,1, I was
curious about its effects especially with argyrotype, but it actually
dissolves silver not bleaches it. That might be problematic imo.

Best Regards
Serdar


-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
Marek Matusz
Sent: 14 Mayıs 2013 Salı 08:15
To: alt photo
Subject: [Alt-photo] Re: Was Sulfamic Argyrotype and toning

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 i  n 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  > From: C.Breukel at lumc.nl
> To: alt-photo-process-list at lists.altphotolist.org
> Date: Mon, 13 May 2013 09:01:56 +0000
> Subject: [Alt-photo] Re: Was Sulfamic now VDB and pt/pd gold leaf
> 
> All these discussions make want to give Agryotype again, I wasn't too
happy with the results on Simili Japon, but I did not use an acid treatment.
> 
> Gold toning is not always suitable (at least to my taste), was Pt toning
tried in combination with Agryotype, and if so could you share your
procedure ?
> 
> Thanks,
> 
> Best,
> 
> Cor
> 
> 
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