QWe have some walnut slabs and I noticed that the moisture varies quite a bit
depending on the loca-
tion where we measure the MC with a
meter. Why is this?
ASome species of wood have a tendency to develop wet pockets, which are small zones of very wet wood
while the rest of the piece is quite dry.
We see this especially in cottonwood,
aspen, elm, some species of walnut
(claro and tropical), white pine and
hemlock. Thicker stock has more of an
issue than thinner. The only cure for
this moisture variation that we have is
If we use the wood with wet pockets,
then it is common to see the water
eventually evaporate after the product
is manufactured. With this evaporation, we see shrinkage in the product,
mainly in thickness, which can be a
QIs drying a disk from a tree possible without cracking it?
AI suspect that just about ev- eryone in woodworking has been approached by some- one with the question that
goes something like, “A tree Grandpa
planted 100 years ago just fell, and we
want to make a few tabletops from this
wood as a family remembrance. We
would like to cut a disk (circular or
oval), dry it without any large cracks,
WOOD DOCTOR’S Rx
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Do not use higher humidities and do not add
moisture before correct temperature is achieved.
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