Re: fogged digital negative?

[Jon Lybrook <jon@intaglioeditions.com>]

Hi Greg,

This is not a normal problem, but I've seen it happen before when the 
transparency was in contact with a Solarplate(TM) for an extended period 
of time after exposure.  My sense was some slightly viscous chemical in 
the solarplate seeped out and contaminated the film, but any moisture 
could cause it.  Try licking your finger and making a line with it on a 
piece of scrap OHP, you'll note the mark remains and will record in a 
contact print.

Are you certain your cyanotype emulsion coating and paper were 
completely dry prior to making a contact print?

Jon

Gregg Kemp wrote:
> I was printing some cyanotypes today and one of my digital negatives 
> seems to have "fogged".  I've printed with this negative 3-4 times 
> before, with fairly consistent results.  But today it added a dark 
> ring around the print.  When I looked at the negative, it looked OK on 
> the inkjet side, but the other side had a strange, silvery fog to it.  
> The effect was to lighten the negative and print out darker around an 
> area about 6 inches in diameter.
>
> Is this a normal problem for a digital negative - a short life span?  
> Or did I do something wrong - maybe use it too soon after printing the 
> negative.  I don't remember how long I waited before using it to make 
> a print.  But I've used it several times over several weeks.  I'll 
> make another negative, but just wanted to check here to see what I may 
> have done wrong.  The negative requires a 9 minute exposure for the 
> cyanotype and paper I'm using.  I'm printing with a UV lightbox that's 
> around 26 x 20 inches or so, and about 4 inches from the bulbs.
>
> - Gregg 
--
Jon Lybrook
Intaglio Editions
http://intaglioeditions.com
303-818-5187