[Alt-photo] Re: B&W toning of cyanotypes

[Serdar Bilici]

Hi Matti,

I used vinegar (straigt and diluted) for trad. cyanotypes. It has no effect
on the color imo. But citric acid definitely shifts the colors towards
greener hues in both the traditional and the new cyanotype formula. Whether
added into the sensitizer or used as the first acid wash.

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
Matti Koskinen
Sent: 19 Mayıs 2013 Pazar 11:16
To: alt-photo-process-list at lists.altphotolist.org
Subject: [Alt-photo] Re: B&W toning of cyanotypes

On 19.5.2013 8:04, raven erebus wrote:
> Interesting.... I've tried very similar methods and didn't get those 
> results.
> By washing soda do you mean calcium carbonate?
> what brand of instant coffee? (it does seem to make a difference) And 
> what kind of paper did you use? (my experiments seem to vary greatly 
> depending on paper)
>
> Here's my example and instructions for a lovely sepia tone.
> http://www.flickr.com/photos/violentbloom/8671043077
>
>
Washing soda is Sodium Carbonate, not Calcium nor Bicarbonate used in
baking. The coffee I used is the same  re-branded Deuctsche Kaffee-extrakt
origin, as given in Caffenol Cookbook.  The paper is Daler-Rowney Aquarelle
300g/m2 Acid free cold pressed A3-pad, which I cut in two.

I'm thinking that the acetic acid development has something really to do why
the prints get this almost b&w tone. When I've tried toning only water
development, I get brown tone and staining, as I have to tone much longer.

I've tried green tea also, but never get the truly amazing tone of your
print.

thanks for sharing.

-matti


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