[Alt-photo] salted paper

Anne Eder chansonette at gmail.com
Wed Sep 14 15:11:46 UTC 2016


Chris-
When you have a minute- I just read your last post and you mentioned arrowroot in conjunction with platinum toning and for matte surface. Can you direct me to some reading on that? I've been working in platinum and palladium quite a bit recently. 
Thanks! 

Anne 

Sent from my iPhone

> On Sep 14, 2016, at 11:06 AM, Christina Z. Anderson via Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org> wrote:
> 
> 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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