AJatoba is a very dense and extremely strong wood species. The wood does not shrink much, just 8 percent
green to oven dry maximum.
A small change in humidity and
moisture content of kiln dried wood
will not create enough stress to initiate
new checks or cracks.
Therefore, the cracks you see opening are preexisting cracks that are
hard too see until the wood is exposed
to dry conditions. A small amount
of shrinkage means that the cracks
Jatoba is known to develop checks
and cracks in drying, especially if it is
dried too quickly. Over-drying under
7.0 percent MC also means the wood
will behave in a brittle manner when
This can accentuate cracking, but
such damage can be hard to detect
until exposure to a low humidity, such
as in the wintertime in a heated home.
Incidentally, when measuring MC,
it does little good to check the pieces
after defects develop, as the defects
mean that the moisture has changed.
So, you will almost always see low MCs
after seeing the defects.
The important measurement is the
MC before the defects are seen; that is,
before the piece dries. ;
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“Direct contact with sawmills by a dedicated
lumber buyer representing the manufacturer of
wood products (will likely be) essential.”
measurement is the
MC before the defects