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Old February 12th 11, 07:18 AM posted to rec.crafts.polymer-clay
Frank[_4_]
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Default Cracking, pinholes after baking -- how to prevent?

FIMO soft, yellow. Making very simple 1/4" thick by 1/4" round
dots for inlaying into wood. Baking 130F for 30 minutes, pieces
invariably end up with cracks and pinholes that grab wood stain,
which muddies their otherwise bright color. Problem seems to
be worse with test pieces which *have* been kneaded, as per
directions.

Looks to me like air bubbles being trapped while kneading and
layers created when folding the clay failing to bond under heat.
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