Mathew,
>
I have a problem that some of you may know the answer to or recognize.
When I mask the negative by placing a rubylith window on top of the
negative between it and the glass of the contact frame I get a fine
line of exposed emulsion (develops out to be a fine line on all four
sides of the image) where the edge of the negative is. But, the mask
window is smaller than the image on the negative and covers the edge of
the negative. When I place the mask between the neg. and paper the
problem goes away, but the contact is poor at the edges of the images.
Do you think light could be travel horizontally through the negative
and causing an exposure at it's very edges ( a bit like fiber optics)?
I TAed for a professional platinum printer ( Arkady Lavov) and he told
me this would happen and that I should just place the mask between the
negative and paper, but he never told me why. Does anybody else
recognize this problem or am I just mad?
It really bugs the hell out of me. Any help would be much appreciated.
>
Your analysis and solution to the problem is correct. The problem with
uneven contact may be difficult to correct. You can tape the negative to the
ruby lith mask with ruby lith tape so that the mask is sitting on top of the
negative. The tape should cover the entire perimeter of the negative to
prevent the light piping effect. Take care to make sure the mask lies flat
and does not buckle.
Or if you use a vacuum easel you can place the negative on top of the mask
and there should be even contact with the paper through out the negative
area.
Hope this helps,
Don Bryant
Received on 06/29/06-02:11:51 PM Z
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