[alt-photo] Re: ware cyanotype paper sensitivity

[francis schanberger]

Earl,

It is probably your choice of paper. The papers I have had success with
using the Ware Cyanotype are Ruscombe Mills, Bergger  COT 320, and an old
lot of Arches Platine. I got to busy with my vandykes but I believe I have
had success with Coventry Rag Vellum White. I won't be able to do any New
Cyano until May.

I am sure there should be a few replies suggesting acidifying your paper.
The usual suspects for acidifying the paper are HCl, strong acetic acid, and
oxalic acid.

BTW, about a month ago I tested a batch of Ware Cyanotype I mixed in 2006
and it still had great dmax. Take care not to disturb the sediment on the
bottom of the bottle. Just draw up the blue green (not as chartreuse as
classic cyano) solution.

-francis

On Sat, Jan 9, 2010 at 9:01 PM, Earl and Patty Johnson <earlj at comcast.net>wrote:

> I am new to this list, but I recognize almost all of your names from other
> places. I hope that some of you can shed some light on my situation.
>
> Today I coated some Mike Ware formula new cyanotype on Arches Aquarelle
> grain satine, and it turned bluish/green before it even dried. I know that
> this sensitizer is sensitive (pun intended) to paper chemistry, but I
> expected this paper to work. Does anyone have experience with this
> combination? Does the paper have an alkali buffer that can be neutralized
> with a soak in something like citric acid solution before coating? Or is my
> cyanotype solution bad and should be discarded? Or is this paper verboten
> for new cyanotype?
>
> I like the Ware formula - I get six or seven more steps in the Stouffer
> wedge than I do with the traditional formula. However, it is frustrating to
> coat it on expensive paper and see it fog spontaneously.
>
> Thanks for any comments.
>
> Earl Johnson
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>



-- 
francis schanberger

www.frangst.com