Paper for Cyanotypes - An (Incomplete) Survey

[cullah]

I did a slapdash, very non-scientific test of one of the orange papers this evening.

I have no idea if this happens when one is laying down too much sensitizer, but the middle of the sensitizer blob stayed a blob, while the outer edges which I had coated more thinly, showed up as blue when exposed to my UV lamp. I am not sure either if the cyanotype solution itself is acting up, since it is out of date.

I am going to do another test, and get the sensitizer on a bit thinner. Perhaps it is a matter of getting less on there, and keep off flooding it, since the solution just bled through to the back of the paper. Anyways, I enjoy the surface, and I'll keep at it for a bit to see if I can get it to work. If it doesn't work, I'll draw funny birds on it instead.

Socorro paper for pt/pd

 

[fgorga]

Socorro paper for pt/pd

Can you provide more information about this paper? Especially a source!

I tried Google to find out more and came up essentially empty, only a link to a 19 year old post here at Phototrio which mentions that it was supplied by Bostick and Sullivan. However, a look at the B&S website does not seem to mention "Socorro" at all.

 

[Raghu Kuvempunagar]

It will be interesting to try such thin paper and to hear your experiences.

I've been testing Hahnemuehle Sumi-e paper for different processes (Kallitype and FerroBlend primarily) and my experience could be of interest also to those who want to try this paper for New Cyanotype.

Sumi-e paper is alkaline and requires acidification. Without acidification, Ferric Oxalate and Ferric Ammonium Oxalate based sensitisers produce a brown colouration. After acidification, the paper works like a charm. Like all thin papers, it soaks up a lot of sensitiser but prints nicely and has good wet strength.


Straight out of the box:

After neutralisation by soaking in Citric Acid solution: