On Wed, 22 Jan 2003, Mitchell D. Miller wrote:

*>Also ... how DO you expose a doublesided board?  Put film on both sides
*>and expose one at a time, or do you have a doublesided light source?

Make a 2-sided exposure frame (2 rectangular sheets of glass held together
at one edge by textile adhesive tape - loosely). You expose 1 side, turn
over, expose the other. A set of strong rubber bands keep the two plates
pressed together.

Another way to achieve registration is to register the two artwork sides
wihtout the board, insert a piece of cardboard between them outside the
artwork area, and staple them together. Then slip the board into the
'folder' and the folder into the frame described above. The cardboard
serves as spacer, it should be as thick as the board. Instead of staples
you can use fast glue. I have used double sided sticky tape (foam type)
instead of the cardboard. Works great and the foam compresses between the
glass sheets so results are near perfect (as near as they can be with
this method).

Peter

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