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

[Loris Medici]

Hi Keith, I've read that sumac contains quite a lot gallic acid, but I'm
not sure if it's in the fruit or somewhere else. Try to boil some and use
the unfusion as a toner, it may work... It's on my list of things to try
but it's a long time I didn't any cyanotypes.

Regards,
Loris.


2013/5/19 Keith Gerling <keith.gerling at gmail.com>

> Sumac?  I still have a bag of that from Istanbul that is pretty stale.  I
> can use that for toning?
>
>
> On Sun, May 19, 2013 at 6:04 AM, Serdar Bilici <sbilici at gmail.com> wrote:
>
> > 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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