From: Michael Healy (mjhealy@kcnet.com)
Date: 01/22/03-11:21:12 AM Z
Sam, do you dilute your vinegar, or are you talking about using it straight?
How long do you soak yours this way? By visual inspection?
Mike
----- Original Message -----
From: <stwang1@bellsouth.net>
To: <alt-photo-process-l@skyway.usask.ca>
Sent: Sunday, January 19, 2003 10:43 PM
Subject: Re: Re: cyano and Future floor polish
Gord,
A soak in vinegar will return it to cyan, but if it is bleached, vinegar
won't restore it.
I found it best to print cyanotype a little darker than you want. Then you
can use a highly diluted ammonia bath to reduce/lighten selected areas. This
also "tones" those areas to brown or other colors, but it all comes back to
blue, or cyan, when you soak it in vinegar. The colors, that is. Not the
bleached density.
Sort of what Jay Dusard does with potassium ferricyanide on silver. (Jay
almost never leaves a print unbleached, and says that some people accused
him of starting out with pieces of totally black print).
Sam Wang
>
> From: "Gordon J. Holtslander" <holtsg@duke.usask.ca>
> Date: 2003/01/19 Sun PM 10:01:23 EST
> To: alt-photo-process-l@sask.usask.ca
> Subject: Re: cyano and Future floor polish
>
> I wonder if soaking the print in a mild acid would help?
>
> When I was playing around toning cyanotypes I notices that after I
> bleached a cyanotype in an alkali (sodium carbonate) I was able to restore
> it by soaking it in vinegar.
>
> I recovered a cyanotype T-shirt that had been bleached by washing it
> (normal wash seems to be too alkali) by soaking it in vinegar.
>
> This assumed that the same chemical changes occur when its faded and
> bleacher, not likely the same though.
>
> Its warm and sunny here only -10 C :)
>
> Gord
>
> On Sun, 19 Jan 2003 SATGRE@att.net wrote:
>
> > Chris,
> >
> > Have you tried putting the print in a dark closet for a few days. I seem
to
> > remember reading someplace that if a cyanotype starts to fade you can
put it in
> > a dark space for a few days (?) and the color returns.
> >
> > Stuart
> > > Judy et al,
> > > I left the cyano with Future on it out in the Montana sun for a
couple
> > > days. I covered half of it up, and had both the Future part and the
> > > non-Future coated part exposed to the sun. The more navy color of the
cyano
> > > that the Future produced has remained so--it did not revert to the
> > > turquoisish shade either covered or sun exposed. But on both cyanos
there
> > > is a marked difference in density (in other words, fading) that
occurred
> > > from the sun exposure. Do cyanos normally fade with strong sun? I
thought
> > > they were quite archival.
> > > P.S. Still haven't received my MSDS from Johnson and Johnson
even tho
> > > they said they'd fax it that night.
> > > Chris
> > >
> > >
> >
>
> ---------------------------------------------------------
> Gordon J. Holtslander Dept. of Biology
> holtsg@duke.usask.ca 112 Science Place
> http://duke.usask.ca/~holtsg University of Saskatchewan
> Tel (306) 966-4433 Saskatoon, Saskatchewan
> Fax (306) 966-4461 Canada S7N 5E2
> ---------------------------------------------------------
>
>
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