Re: Temporary Support for Carbon

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From: Sandy King (sanking@clemson.edu)
Date: 09/27/01-08:14:31 PM Z


Dave,

I would try the smooth side of the mylar for the temporary support
for double transfer. It it does not have a sizing it should work ok.

As regards the second question, I don't have a complete answer. One
material that I have used with a lot of success is called Kal-Glas
(trade name). It is a flexible polyvinyl plastic about 1/32" thick
that has among its uses the replacement of convertible car back
windows. My experience with polyvinyl plastics is that they tend to
be very flexible, bend easily when placed in warm water, harden when
placed in cold water. They tear but do not break, and are heavier
than water.

Many acetate plastics and some brands of plexiglass also work, well
but some don't. The only way to know for sure is to try them out.

There are two requirements for the plastic to work with double
transfer. First, the plastic must be one which will hold the image
during warm water development,and second, it must release easily the
image to the soluble double transfer final support at the time of the
double transfer. Many things can lead to failure at one or both of
these stages so expect some fair of experimentation to perfect the
technique.

Sandy King

><< Do you mean the support on which the pigmented gelatin is poured in
> making carbon tissue, or the temporary plastic support we use in
> developing the relief for the double transfer process?
> >>
>
>Sandy,
>
>I mean the temporary support for the double transfer process. If I use mylar,
>which side should I use?
>
>A related question is that you mentioned "plastic of polyvinyl" in the book
>"Coming into Focus." What are some examples of those plastics? Is mylar one
>of them?
>
>Thanks in advance!
>
>Dave S

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