expose a different color.
Sometimes we see the outer
shell of wood being a different
color than the core because of
the kiln drying temperature
used...hotter when wet is usually
darker. Alder and maple’s color
are two woods that are especially
sensitive to kiln drying conditions. We can also dry wood more
slowly under the kiln stickers,
giving us a different color under
the sticker (sticker stain) than the
rest of the piece of lumber. The
rule of thumb is that differences
in drying speed result in differences in color. Reaction of wood
and iron when the wood is wet
can also create a very dark stain.
In a few cases, steaming wood
prior to drying can darken the
wood color substantially. Walnut,
sweet gum, cherry and beech are
often steamed in this manner to
Sometimes freshly sawn lumber is dipped in an insecticide
or fungicide that also contains
an optical brightened or bleach
to brighten the outside of the
lumber. Finally, color can also
vary because we group several species with different colors into one
lumber name, especially foreign
woods. Within red oak, for example, are 20 commercial species,
with some having a reddish color
and others having a grayish hue.
The bottom line is that color
variation is a key feature of wood
and enhances wood’s beauty.
We can control wood’s color
somewhat during drying, but
not much before or after that.
If someone wants the same, uni-
form, predictable color, go with
Find out more today.
Maximizing yield with a quality rip saw results in
increased profit for you. The perfect cut quality
and flexibility of WEINIG’s range of rip saws
deliver everything you need for fast, smooth
operation and less waste. It’s time to put your
profit margin in the driver’s seat with WEINIG.
| December 2017 | Get information FAST from suppliers:
Gene Wengert, “The Wood Doctor,”
has been training people in efficient use
of wood for 35 years. He is extension
specialist emeritus at the University of