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RE: [TCML] Poly thickness



Also, in high humidity conditions, molecular level moisture adhesion is a
problem.

Is that another way of saying that it gets damp?

There as ABsorb, and there is ADsorb.

ABsorb is what sponges and other porous things do.  Water is pulled into
voids, and can be driven out with low heat, just evaporated away.

ADsorb is what dye does: it forms molecular bonds and the water is firmly,
"permanently" attached.  It takes much higher heat to break the bonds and
drive that off.

It's quite possible for materials to do both.  When you do ceramics, first
you dry the clay, removing ABsorbed water.  Then you fire it, removing the
ADsorbed water (and vitrifying).

--ian
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