A panel or core product composed of small particles of wood and wood fiber that are bonded together with synthetic resin adhesives in the presence of heat and pressure.
Pockets of disintegrated wood caused by localized decay, or wood areas with abrupt color change related to localized injury such as bird peck. Peck is sometimes considered as a decorative effect such as bird peck in pecan and hickory or pecky in cypress.
Veneer sliced parallel to the pith of the log and approximately tangent to the growth rings to achieve flat-cut veneer. Plain-sliced veneer can be cut using either a horizontal or vertical slicing machine or by the half-round method using a rotary lathe.
A face containing components which provides a pleasing overall appearance. The grain of the various components need not be matched at the joints. Sharp color contrasts at the joints of the components are not permitted.
A single sheet of veneer, or several pieces laid with adjoining edges, in a piece of plywood (see layer). In some constructions, a ply is used to refer to other wood components such as particleboard or MDF.
A panel composed of an assembly of layers or plies of veneer, or veneers in combination with lumber core, particleboard core, MDF core, hardboard core, or of special core material, joined with an adhesive. Except for special constructions, the grain of alternate plies is always approximately at right angles, and the face veneer is usually a hardwood species.
A straight grain appearance achieved through the process of quarter-slicing, or through the use of veneer cut in any fashion that produces a straight grain effect. Cut is radial to the pith to the extent that ray flake is produced, and the amount may be unlimited.
RANDOM MATCHED (MISMATCHED)
A panel having the face made up of specially selected dissimilar (in color and grain) veneer strips of the same species and generally V-grooved at the joints between strips to simulate lumber planking.
A generic term for panel products made with strands, wafers, particles or fibers of wood. Individual products include hardboard, insulation board, particleboard, medium density fiberboard (MDF), and oriented strand board (OSB)/waferboard. Particleboard and MDF normally use ureaformaldehyde resin as the binding agent. OSB/waferboard normally uses phenolformaldehyde as the binding agent. Most hardboard and insulation board use the lignin from the processed wood as the binding agent. Most dry-process hardboards contain phenol-formaldehyde to increase bonding strength.
A patch, shim, or filler material inserted and/or glued into veneer or a panel to achieve a sound surface.
Wood or filler insertions similar in color to adjacent wood ,so as to blend well.
A straight grain appearance achieved through the process of cutting at a slight angle to the radial on the halfround stay log, or through the use of veneer cut in any fashion that produces a straight grain with minimal ray fleck.
Veneer produced by centering the log in a lathe and turning it against a broad cutting knife which is set into the log at a slight angle.
Irregular shaped areas of generally uneven corrugation on the surface of veneer, differing from the surrounding smooth veneer and occurring as the veneer is cut by the lathe or slicer.
The panel face is made from components running through the flitch consecutively. Any portion of a component left over from a face is used as the beginning component or leaf in starting the next panel.
The living wood of lighter color occurring in the outer portion of a tree, sometimes referred to as sap.
A separation along the grain of wood in which the greater part occurs between the rings of annual growth.
Veneer produced by thrusting a log or sawed flitch into a slicing machine which shears off the veneer in sheets.
Visible on observation, but does not interfere with the overall aesthetic appearance with consideration of the applicable grade of the panel.
A sheet from a flitch is slid across the sheet beneath and, without turning, spliced at the joints.
SMOOTH, TIGHT CUT
Veneer carefully cut to minimize lathe checks.
General term used to describe lumber or veneer produced from needle and/or cone bearing trees (see hardwood).
Plywood panels in which all inner plies are grade J or better. Splits up to 3.2 mm (1/8 inch) are permitted.
An internationally established botanical classification of trees.
The ratio of the weight of a certain volume of a substance to the weight of an equal volume of water, the temperature of which is 40C (39.20F).
A method of achieving an inverted “V” or cathedral type figure by joining two “flat-cut” face componenets of similar color and grain. The cathedral type figure must be achieved by a single component in “AA” grade; the split heart method is permitted in grades “A” through “E”.
Separations of wood fiber running parallel to the grain.
Natural discolorations of the wood substance.
In knife-cut veneer, that side of the sheet that was farthest from the knife as the sheet was being cut and containing no cutting checks (lathe checks).
A thin sheet of wood, rotary cut sliced, or sawed from a log, bolt or flitch. Veneer may be referred to as a ply when assembled into a panel.
Narrow and shallow V- or U-shaped channels machined on the plywood face surface to achieve a decorative effect. V-grooving is most commonly encountered in mismatched or random matched wall panels as the grooves fall on the edge joints of the pieces of veneer making the face appear as planking.
Generally up to 5-ply grooved or ungrooved plywood or reconstituted wood panels, generally in thicknesses of 12.7 mm (1/2 inch) or less, with at least one surface decorated and protected with a liquid applied or film overlay finish.
An aggregate of resin and strands, shreds, or flour of wood which is used to fill openings in wood and provide
a smooth, durable surface.