2216Re: [PPLetterpress] UV Light box question
- Nov 11, 2003I have begun experimenting with a UV light box I purchased for making
photopolymer plates. It does not have a vacuum but I have been putting a
lot of extra foam padding under the plate glass to keep the pressure tight.
So far I have had some very good results, however I was surprised that any
exposure over about 30 seconds tends to over-expose the JET brand steel
Is this consistent with what others have found using UV lights? What sort
of exporure times do you use?
I have also heard that some people use a type of translucent white sheet
between the glass and the negative to filter the UV source. This I was told
slows the exposure time and provides more even exposure to the plate. Do
others of you here do that? Can you tell me what this material is, where to
get it, and what sort of exposure times you use with it?
ty in advance,
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