Liberty Catalog 2012 - page 5

HARDWOOD PLYWOOD
HARDWOOD PLYWOOD GRADES
FACE GRADE VENEER
AA Highest ANSI Face Grade ~
The best quality face grade for high end use such as architectura
l
panel
i
ng
,
doors
and cabinets
,
case good and quality furniture. For Special Order Products ask salesmen on details
.
A GRADE ~
Best in-stock warehouse grade
.
If spliced
,
components must be spliced and bookmatched for a pleasing
effect of color and gra
i
n
.
Minor, infrequent burls
,
pin knots and inconspicuous small patches are allowed. Frequency
of defects depends on species
.
B GRADE ~
Where the natural characteristics and appearance of the species are desirable. Face veneers usually
but don't always match perfectly, can have larger knots
,
some streaks
,
little more burls
,
but still excellent for cabinet
making for the price
.
C GRADE ~
Allows more numerous and larger burls, pin knots
,
color variations and rough cut veneer. C Grade is a
sound
,
smooth grade or paintable grade, or where surface can be hidden
.
SPECIALTY GRADE ~
Appearance characteristics are not standardized and are subject to agreement between the
individual buyer and seller
,
as in factory f
i
nished wall paneling
.
Usually effects such as those created by wormy
chestnut, bird's-eye maple, and English brown oak are considered specialty grade
.
D GRADE ~
A sound grade
,
free of open defects but allows unlimited and more repaired defects than the C Grade
.
E GRADE ~
A sound grade-all repaired defects are allowed
.
SHOP GRADE ~
A Shop Grade veneer will yield an 85% plus useable panel
.
Panels down graded to Shop Grade
are because of
sand throughs
"
in face veneers or veneers not covering the full length or width of the panel
,
etc
. Most
s
hop panels are down graded from A or B faces
.
BACK GRADE VENEER GRADES
1 GRADE ~
Allows color variation, no large sound knots and tight knots and tight knots can not exceed 3/8" in
diameter
.
Core laps are not permitted and wormholes and splits are required to be filled.
2 GRADE ~
Color is not a consideration and sound knots can not exceed 3/4" in diameter
.
Repaired core laps and
repaired knot holes are permitted.
3 GRADE ~
Knot holes of 1" in diameter are permitted. 3 Back Grades are not required to be sound or smooth in
ANSI Grades. We require 3 Grade knot holes to be filled and sanded.
4 GRADE ~
Reject Back Grade that is not sound (allows many open defects) and utilizes a mill option on the species
.
PLYWOOD CORES
VENEER CORE ~
Made with alternating veneer inner plies. Veneer core panels are relatively light in comparison with
composite panels, typically weighing about 70 lbs. per 3/4” panel. Veneer core offers great strength and stability with
better spanning properties than either PBC or MDF.
PARTICLEBOARD CORE ~
Raw PBC is composed of variably sized wood particles bonded together with a synthetic
resin. PBC is the least expensive core option for hardwood plywood, offering a smooth, void-free surface for veneer
faces. PBC is very uniform in thickness and density. PBC is one of the heaviest core options for hardwood plywood
construction, weighing as much as 100 lbs per 3/4” panel.
MEDIUM DENSITY FIBER CORE (MDF) ~
MDF is made in a production process similar to PBC except that all of
wood particles are small and uniform like sawdust. MDF offers great stability and is the least likely to react when
subjected to a measurable change in temperature or humidity. It offers a very smooth, void-free surface for veneer
faces. MDF has greater strength and screw holding properties than particleboard and weighs around 100 lbs.
COMBI CORE with COMPOSITE CROSSBANDS ~
Constructed of veneer core inner plies with particleboard or
MDF crossbands. Offers similar strength and stability to veneer core but has the void-free surface quality of PBC or
MDF. Excellent substrate for thin sliced woods and rotary woods, reducing the potential for core transfer.
1,2,3,4 6,7,8,9,10,11,12,13,14,15,...68
Powered by FlippingBook