Re: humidity and fogging of cyanotype emulsion

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From: Judy Seigel (jseigel@panix.com)
Date: 09/09/01-04:21:20 PM Z


On Sat, 8 Sep 2001, shannon stoney wrote:
> It's just the unexposed emulsion. I haven't printed it yet. Some
> samples I made yesterday were also fogged in the emulsion but cleared
> all right. I was sort of surprised because I thought that if the
> emulsion turned green, that it meant the paper had fogged. Maybe
> not? If not, why are we sometimes told to worry if the emulsion
> turns green or blue before it's exposed?
>

"They" like you to worry... IME turning green is usually OK, even normal,
turning blue is a definite sign of trouble. However, I have made a blue
coating OK again with a fresh coat of emulsion on top of it, exposed
promptly.

Judy


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