Hi Jordan,
It sounds like severe under-exposure. Try giving it about 5 times more
exposure.
The "correct" exposure should look terrible and possibly light gray, but
gain full tonality after development, or "clearing".
In my experience, in bright sun, the image may look good after a couple of
minutes exposure, but needs 10 to 30 minutes exposure for a rich tonality
print.
Sam Wang
>
> Hi everyone,
>
> This weekend I made my first cyanotypes. I used the formula attributed
> to Patricia Dreher (http://www.bostick-sullivan.com/c_cyano.htm --
> scroll down to "other variations") The first few that I made came out
> beautifully -- one photogram and one from an inkjet negative on
> Pictorico OHP.
>
> After that, though, I starting having problems. The exposed cyanotype,
> before development, looked great -- nice contrast, etc. But on
> clearing, almost all of the image density bled away into the wash
> water, leaving practically nothing.
>
> Does anyone know the possible causes of this or potential remedies?
> The only thing I noticed was that the exposures made in direct sun
> fared better (even though I compensated with much longer exposure
> times when I printed in indirect sun or under a compact spiral
> blacklight).
>
> The paper used was Fabriano Artistico (mixed results) and Arches
> Platine (uniformly bad). I coated with about 2 ml of freshly-mixed
> sensitizer per 8x10" sheet and allowed the coated paper to air-dry in
> the dark for 30-60 mins before printing.
>
> Thanks for your advice
>
> Jordan
>
> --
>
>
> Jordan Wosnick
> jwosnick@fastmail.fm
>
Received on 07/17/06-10:24:02 AM Z
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