positives for photogravure

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From: Shannon Stoney (sstoney@pdq.net)
Date: 09/17/02-06:14:06 AM Z


I am getting ready to make some polymer photogravures. At the print
shop where I'm working, the other people send their negatives to an
imagesetting place to be scanned and then put on film. The results
are very good, but it's rather expensive. I am wondering if there is
a way to do this in a less expensive way. One possibility is to scan
the negatives myself on the flat bed scanner in this shop and try to
print them out on pictorico film or some such. But my previous
attempts to make digital negatives (in this case it would be a
positive) were not good due to banding with the printers I had
available to me.

So I am wondering about making film positives directly. If you have
an 8x10 negative, say, couldn't you contact print it onto another
piece of the same film? Some of the negatives I want to use are 4x5;
I could make smaller prints of those, or possibly get access to an
enlarger and enlarge them onto film. But let's say you're contact
printing an 8x10 negative to make a film positive. If you use another
sheet of Tri X for the positive, it will be very fast, so the
exposure will have to be very fast. If you are exposing with a 7 1/2
watt lightbulb, I think it would be hard to get the exposure short
enough. Am I correct to worry about this?

Anyway, I'm interested in hearing about how other people resolved
this. In a way, it's just an issue of making a copy negative, or an
enlarged negative, except that it's a positive; but then also there's
the fact that the photopolymer plates probably have different curves
from other processes, and I don't know yet what they are.

--shannon


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