Re: nu arc mat

[Sandy King <sanking@clemson.edu>]

Judy Seigel wrote:

>Since the vacuum only comes through the one hole I
>just cut that hole in the vinyl. The advantage, besides not putting
>dimples in my prints (in a couple of cases for some reason permanently
>marking the negative), is it's removed so easily for cleaning.
>
>I never could figure out why they made the mat that way, though presumably
>there was a reason...
>



When I first started using a vacuum frame with carbon printing I got 
all sorts of dimples on the print from the surface texture of the 
mat. As a remedy I now use a piece of phenolic plastic of about 1/32" 
thickness slightly larger than the print between the mat and the 
print. This prevents the dimples and I still get more than sufficient 
pressure from the vacuum.

Sandy K.
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