Specification

Hardwood Plywood Grading Guide 2015 columbiaforestproducts.com 17
Veneer Core is produced by
placing the “lines” of core veneers
into the panel “sandwich” so that
adjacent plies having a grain
direction oriented at approximate
right angles to each other. Veneer
core panels are relatively light in
comparison with composite core
panels, typically weighing about 70
pounds per 3/4" panel.
Veneer core offers superior physi-
cal properties than either PBC and
MDF, but they may exhibit a bit
more thickness variation.
Due to ever decreasing face ve-
neer thicknesses, slight imperfec-
tions on a veneer core surface
may show through or “telegraph.”
Veneer core may be manufactured
with r, aspen or yellow poplar, or
a combination of these.
FIR CORE
(Abies spp.)
West
ASPEN CORE
(Populus tremuloides)
North
POPLAR CORE
(Liriodendron tulipifera)
South and East
PBC is composed of wood
particles bonded together
with adhesive. It’s the least
expensive core option, with a
smooth, void-free surface. PBC
is very uniform in thickness and
density, but is heavy weighing
about 100 lbs per 3/4" panel.
Medium Density Fiberboard is
composed of wood ber bundles
bonded with adhesive. It offers a
very smooth, void-free surface.
MDF has greater strength and
screw holding properties than
particleboard and weighs around
100 lbs per 3/4" panel. MDF is a
good choice for very thin panel
applications.
Constructed of veneer core inner
plies with particleboard or MDF
cross bands next to the face
and back. Offers similar strength
and stability to veneer core but
has the void-free surface quality
of PBC or MDF. Combination
core (combi) panels like Classic
Core replace veneer crossbands
with a thin layers of MDF which
visibly reduce core veneer tele-
graphing.
PARTICLEBOARD CORE
PBC
MDF CORE
COMBI-CORE
Classic Core
®
This is a specialty all hardwood
“European style,” high ply-count
birch veneer core blank. This
core is often used for decora-
tive applications where the
panel edge is revealed. Europly
PLUS
®
is a NAUF panel. A 3/4"
EuroplyPLUS panel weighs
about 85 lbs.
MULTI-LAYERED CORE
MPX
®
CORE
Fir Core
Poplar Core
Aspen Core
*For reference purposes only. Due to resource availability and shipping
conditions, actual core delivery could vary from the map.
MPX core is Columbia’s newest
core innovation using extremely
smooth poplar hardwood cross
bands under the face and back.
These poplar crossbands are
peeled on state-of-the-art Meinan
®
lathes producing the smoothest
domestic all-wood core in North
America.
n Fir n Aspen n Yellow
Poplar
Columbia specializes in making all-wood veneer core hardwood plywood, but we can also apply our faces and backs to a variety of other cores and core
types we purchase from outside sources.
CORE TYPES