[Alt-photo] salted paper

Marek Matusz marekmatusz at hotmail.com
Thu Sep 15 00:40:58 UTC 2016

The print is more yellow brown and also so much different after exposure then traditional print. I am not sure if the increase of contrast is a result of a bleaching process with copper chloride during initial soak or the inhibition of exposure.

Chris I will send a separate email with the attachment.


From: Alt-photo-process-list <alt-photo-process-list-bounces at lists.altphotolist.org> on behalf of Serdar Bilici via Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org>
Sent: Wednesday, September 14, 2016 3:36 PM
To: The alternative photographic processes mailing list
Cc: Serdar Bilici
Subject: Re: [Alt-photo] salted paper

Hi Christina,

I haven't tried that formula. I recall reading in some old text that in
small amounts cupric chloride helps to increase contrast.

I've just adjusted the regular formula (salt, citrate and gelatine) and
replaced the table salt with cupric chloride.
It was an attempt to achieve different colors with salt prints. Cupric
chloride prints out as expected.

The print is very beautiful magenta much vivid than regular salt prints but
it starts to fade in wet process.
I tried a few chemicals in first wash to precipitate the copper hoping that
it wont bleach the silver image but no success.

I think I might have seen zinc chloride somewhere. It is quite soluble in
ethanol, that is why I tried it with collodio-chloride (as strontium
chloride substitute).
It works with regular salt prints too. Salt print with zinc chloride prints
quite fast, but they are very prone to bronzing. Nothing special about the
color, Zinc chloride is hard to store, it is very very deliquescent.

What about casein for sizing?, someone must have tried that.


On Wed, Sep 14, 2016 at 6:06 PM, Christina Z. Anderson via
Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org>

> How exciting; I have added quite a few of you now to my list!
> Serdar, did you do Thomson’s formula of 1908?
> 18g cupric chloride
> 18g gum arabic
> 1 liter water
> up to 1ml potassium dichromate 1% optional.
> Silver is 12.5% with 5.7% added citric and 0.5% gum arabic.
> He goes on to say that either ammonium or sodium will suffice as well.
> I think Marek might have tried it, too, and found it a bust. Marek, am I
> remembering this correctly?
> I can count that in all the formulas I recorded 88 use ammonium 66 use
> sodium 7 use barium, 1 cupric, 1 strontium. So obviously barium, cupric,
> strontium were outliers. I’ve used barium and did not like it. I sized some
> more sheets with it to see if I still feel that way. The color was a poopy
> yellow-brown and the paper felt like it had a deposit on it, scratchy.
> 64 gelatin 26 arrowroot or common starch, 54 no sizing agent, 3 agar agar,
> 1 Icelandic moss.
> Of course, by far albumen is ubiquitous in the literature but I wasn’t
> researching it.
> In other words I can see trends, e.g. from no sizing at all until gelatin
> came in and in the late 1800s arrowroot was talked about a lot because
> glossy was out, matte was in, and it was perfect for platinum toning.
> The big variance is in the amount of gelatin. 1-28g per liter. I usually
> use 8, tried 20 and I did not notice any benefit to a larger amount. The
> most common amount back in the day was 2.3g
> OK enough geeking out for the day.
> Chris
> On Sep 13, 2016, at 11:45 AM, Serdar Bilici <sbilici at gmail.com> wrote:
> > I do salt prints too. I have been stalking all the salt printing posts
> for a while.
> >
> > Btw, I have tried using purely cupric chloride  for salt prints. There
> is no way to stop the bleachig while wet processing due to the presence of
> copper.
> > But in very small amounts it is a better contrast control agent than
> dichromates.
> >
> > Regards
> > Serdar
> >
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