If you really have reverse case hardening, there is no way to cure it other than by heavy planing. I'm assuming it is reverse case hardening. It is case hardening, not reverse case hardening, when it cups or bows together. Case hardening can be easily relieved, but reverse cannot. Case hardening is removed by adding moisture quickly back to the lumber when it is very hot.
Some people use water sprays.
Once the wood is out of the kiln, it is next to impossible to remove the stress, especially when resawing. E-mail us and let us know what you think. No part of this publication may be reproduced in any manner without permission of the Editor. What is safe for one woodworker under certain conditions may not be safe for others in different circumstances.