1) 'Dead' appliances are good sources of sheet steel. Some refrigerators used
to come with slide-in steel panels of different colours. If you don't mind
cutting steel, you can cut and stack several pieces for better heat conduction.
Stiffening can be accomplished with aluminum or steel "L's" or "T's" and epoxy.
I made a "magnetic" easel this way many years ago.
2) Back in the 1970's someone published instructions on how to make a dry
mounting press. If I recall correctly, it involved heating-wire encased in
concrete. I have no idea where I saw the article. Perhaps someone else does.
3) I have seen a dry-mounting "plate" (about 16x20 or a bit bigger) that was
heavy steel with heating elements attached or embedded in some way. I believe
it was a commercial product, but I do not remember a trade name. Unlike Seal
and other presses, this simply sat on top of the print and mounting board
rather than clamping down on it. Extra weight could be piled on top, and when
not in use it could be stored on edge so it didn't use up counter space.
Myron
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