Re: emergency question regarding cyanotype

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From: Christina Z. Anderson (zphoto@montana.net)
Date: 03/30/03-03:29:48 PM Z


>
> I removed one, placed it and a negative in a contact frame, and pulled it
over to my sunroom. It's grey and rainy today, so I figure that the process
will be slow.
>
> My concern is... how slow? Since I haven't seen this actual process
demonstrated, I feel like I'm out in left field. Why is my paper already
blue? Does the chemical evaporate, or has it been fogged somehow?

Shelley,
     I agree with Darryl's comments, except I have been able to expose blued
paper and the image is just not as good and washes out more in the water. I
think what happens is the paper is too alkaline and it messes with the
chemistry.
     The second part of your question: timewise, if it is gray and rainy
outside, expect a very long exposure with traditional cyano. Someone will
correct me if I am wrong, but if I remember, it is the longest time of the
alt processes, and even moreso if you are using traditional cyano mixed 1:1
A to B and not 2:1 A to B, which will shorten your times (thanks Sam Wang).
I can expose under UV easily to 30 or 40min, and under grey conditions, an
hour outside is not unreasonable. Depends on your neg.
Chris


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