RE: Cyanotypes

Colin
If you rinse the print in a weak H2O2 (Hydrogen Peroxide)solution, it will
oxidize immediately & show you what the final result is. I don't remember
exactly what the ratio is.

go to:
http://www.alternativephotography.com/process_cyanotype.html
&
http://www.alternativephotography.com/process_cyanotype2.html

For overviews with good detail.

Enjoy... It really is a lot of fun
Andy schmitt

-----Original Message-----
From: owner-pinhole-discussion@spitbite.org
[mailto:owner-pinhole-discussion@spitbite.org] On Behalf Of Colin Talcroft
Sent: Sunday, November 05, 2006 12:21 PM
To: pinhole-discussion@spitbite.org
Subject: RE: [pinhole-discussion] Cyanotypes

Sorry,

I didn't mean to turn this into the cyanotype forum, but it's been so dead
lately that I didn't think I'd be stealing bandwidth, and I knew some of the
pinhole people would know about this. Kate mentioned 45 minutes as an
exposure time. I was already surprised because of the "overexposure" effect
(not fogging) of my first attempts with a 4-minute exposure. I have
subsequently done one more successfully with only a two-minute exposure.
Hmmmm. And again, my main surprise was that the blue kept getting darker for
a day or two after exposure. Sounds like a difficult process to control. I
guess it's time to hit the books. I was just experimenting with a little kit
made for kids called "The Sunlight Print." Maybe it's designed to be very
sensitive so the kids don't have to wait? Anyway, thanks for the thoughts...

Colin
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Received on Sun Nov 5 14:07:00 2006