"robo hippy" wrote in message
oups.com...

Turn to an even thickness which distributes
the drying stresses evenly over the whole bowl, then controlling the
drying process so that the stress doesn't build to a great enough level
that would cause the bowl to crack. Yes they do warp, which I love.

Just as politics, all shrinkage is local.

As an example of how unevenly the drying stresses are distributed - wet
pieces warp.

Turn almost any wood to 3/8 or less, and you should have no cracks you
couldn't already have predicted. Exceptions are woods with prominent rays,
which split easily and randomly along them when local forces are high.
Sometimes they even close up later.