Re: Toning the Cyantoype

I'm also new to this world of cyanotypes... And I'm interested in trying
these toners.
I've been using a rinse of hydrogen peroxide after I do the wash-out. I
don't imagine this would change the toning process or result hazmat
exposure ... WOULD it?

Barry

David & Jan Harris wrote:

> Loris
>
> With traditional cyanotype I have not tried clearing in citric acid.
> I have tried Fabriano 5, COT-320 and Buxton with similar results.
> Bleaching with sodium carbonate (or even tap water! Its pretty
> alkaline here)
> My tannic acid concentration is 1 teaspoon per litre.
> Typical toning time is around 2 mins - 5 mins.
>
> Perhaps the tannic acid is the key.
>
> David
>
> ----- Original Message -----
> *From:* Loris Medici <mailto:mail@loris.medici.name>
> *To:* alt-photo-process-l@usask.ca
> <mailto:alt-photo-process-l@usask.ca>
> *Sent:* Thursday, April 20, 2006 1:53 PM
> *Subject:* RE: Toning the Cyantoype
>
> BTW, what is your toning time? I tone not more than 5 minutes..
>
> Regards,
> Loris.
>
> -----Original Message-----
> *From:* Loris Medici [mailto:mail@loris.medici.name]
> *Sent:* 20 Nisan 2006 Perembe 15:51
> *To:* alt-photo-process-l@usask.ca
> <mailto:alt-photo-process-l@usask.ca>
> *Subject:* 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 Perembe 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
>
Received on Thu Apr 20 07:50:11 2006