RES: Toning the Cyantoype

Loris,

Concerning the clearing of your cyanotypes, how much citric acid do you use
in a liter of water and for how long do you live the paper in that bath? How
much washing afterwards? What the kind and weight of paper you most
frequently use? Thank you,

Ric

  _____

De: Loris Medici [mailto:mail@loris.medici.name]
Enviada em: quinta-feira, 20 de abril de 2006 09:51
Para: alt-photo-process-l@usask.ca
Assunto: RE: Toning the Cyantoype

Maybe you're using too much tannic acid (I use one full dessert spoon per
litre... or the paper is not adequate; some papers stain more than others).
Do you clear your cyanotypes in citric acid after development (and wash
again)? IME, if I treat cyanotypes in citric acid after the first wash (read
as development) I get a much more contrasty image (cleaner, white highlights
- otherwise, the highlights are low contrast and I can't get paper white)
and much less staining (if any... in my case it's not noticable *unless
compared side-by-side with non-treated paper*).

Regards,

Loris.

-----Original Message-----
From: David & Jan Harris [mailto:david.j.harris2@ntlworld.com]
Sent: 20 Nisan 2006 Perşembe 15:38
To: alt-photo-process-l@usask.ca
Subject: Re: Toning the Cyantoype

I find that even tannic acid stains the paper significantly, in fact there
doesn't seem to be much difference in staining between tannic acid and green
tea. The colour is a little different though (tannic acid is pinker which I
find more pleasant).

Dave

----- Original Message -----

From: Loris <mailto:mail@loris.medici.name> Medici

To: alt-photo-process-l@usask.ca

Sent: Thursday, April 20, 2006 12:10 PM

Subject: RE: Toning the Cyantoype

What is your bleach? Mild alkalis such as sodium carbonate, ammonia, borax
all work well as cyanoype bleaches. If you're mentioning ordinary Sodium
Hypochlorite bleach, it's no good for bleaching cyanotypes...

BTW, Toning with tea will stain the paper considerably, if you can find
tannic acid it would work much better, without staining...

Hope this helps,

Loris.

-----Original Message-----
From: trevor cunningham [mailto:tr_cunningham@yahoo.com]
Sent: 20 Nisan 2006 Perşembe 09:46
To: alt-photo-process-l@usask.ca
Subject: Toning the Cyantoype

Wicked cool...found a bunch of toning recipes and tools to get me started:
tannic acid from tea bags (are earl grey, ceylon, or green tea variations
important to note?), instant coffee, and lead acetate...I have all three of
these and access to loads of household bleach...does the lead acetate tone
require bleaching? my stack of cyanotypes awaits...

Enjoy...Trevor Cunningham

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Received on Thu Apr 20 08:01:14 2006