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How wood veneer is made, from flitch to pressed panel
Every step from the log to a pressed face changes the figure, the yield or the flatness of what you receive. Knowing which step a supplier runs tells you what to ask them.
Seven stages between the log and the panel
Not every supplier runs all seven. A slicer may stop at bundled leaves, a face splicer starts from bought leaves, and a panel laminator buys spliced faces and presses them. Ask where a supplier sits in the chain before you compare quotes.
Log selection and flitching
Veneer logs are graded for diameter, straightness and defects, then sawn into flitches: halves for plain slicing, quarters for quarter and rift, or left whole for the lathe.
Conditioning
Flitches and logs are softened in hot water vats or steam chambers so the knife cuts cleanly. Time and temperature depend on species and density.
Slicing or peeling
A slicer moves the flitch against a fixed knife, one leaf per stroke. A rotary lathe turns the log against the knife and peels a continuous sheet.
Drying and clipping
Leaves pass through roller or belt dryers, then are clipped to remove splits and defects and stacked in the order they came off the flitch.
Splicing
Leaf edges are jointed straight, then joined into a full face with glue line, zigzag thread or tape splicers, in the match the job calls for.
Layup and pressing
The face, any crossband and a back veneer are laid on the substrate with adhesive and pressed in a hot press, cold press or vacuum or membrane press.
Trimming and sanding
Panels are trimmed to size and sanded on wide belt sanders with care, because a sliced face leaves very little material to remove.
Slicing and rotary peeling compared
The cutting method sets the figure, the leaf width and how much face comes out of each log. Thicknesses below are typical for decorative faces and vary by species and mill.
| Method | How it is cut | Typical thickness | Figure | Typical use |
|---|---|---|---|---|
| Rotary peeling | Whole log on a lathe, knife peels a continuous sheet | Commonly 0.3 to 3 mm, set by the lathe | Broad, wild figure, no repeat between leaves | Plywood faces and cores, birch and maple panels, crossbanding |
| Plain (flat) slicing | Half log sliced parallel to a line through the center | About 0.5 to 0.6 mm for standard faces | Cathedral arches in the middle, straight grain at the edges | Cabinets, furniture, doors |
| Quarter slicing | Quarter flitch sliced roughly at right angles to the rings | About 0.5 to 0.6 mm | Straight stripe, ray fleck in oak | Millwork, high end casework |
| Rift cutting | Flitch sliced at an angle to the rays, often on a half round or rift setup | About 0.5 to 0.6 mm | Tight straight grain with little fleck | Rift white oak kitchens and wall panels |
| Half round | Flitch mounted off center on a lathe, cut in a shallow arc | About 0.5 to 0.6 mm | Between rotary and plain sliced | Figured species, wider leaves |
| Sawn veneer | Thin boards cut on a resaw or frame saw, no knife | 1 to 3 mm or more | Same as the board, no lathe checks | Restoration, heavy wear surfaces, hand work |
Knife cut veneer has a loose side and a tight side. The knife opens small lathe checks on the loose side as the leaf bends away. Book matching flips every other leaf, so loose and tight sides alternate and can take stain differently. This is the barber pole effect.
Drying, clipping and keeping the sequence
Freshly cut leaves are wet and are dried in roller or belt dryers to a moisture content suited to pressing, typically around 8 to 12 percent. Over drying makes leaves brittle and prone to splits. Under drying causes bleed through and blisters in the press.
After drying, leaves are clipped and stacked in slicing order. That order is what makes sequence matching possible. A flitch that is reshuffled, or topped up with leaves from another log, can no longer give a wall that reads as one tree.
- Ask forLeaf count, average width and length per flitch, and whether the bundle is complete and in sequence.
- CheckSplit ends, buckling and color shift on arrival. The species reference lists which woods move or darken most.
- AcclimateLet shipped bundles lie flat in your shop before pressing so they settle to your humidity.
Splicing leaves into a face
Leaf edges are first jointed straight on a guillotine or edge jointer, because any gap will show after pressing. They are then joined by one of three methods.
- Glue line splicerApplies glue to the edges and heat bonds them. The tightest visible seam, standard for quality faces and layons.
- Zigzag threadStitches leaves with a hot melt coated thread on the back. Fast, holds well for curved and vacuum pressed work.
- Tape splicingGummed tape on the face side holds leaves together through the press. The tape is sanded off afterwards.
- MatchBook, slip, random, balance or center balance is set here. Write it on the RFQ, or the supplier will use its default.
Layup and pressing
A veneered panel is a balanced sandwich. The face goes on one side of the substrate, a back veneer of similar thickness on the other, and on thin or high stress panels a crossband runs at right angles beneath the face. Hardwood plywood construction in North America is commonly described against ANSI/HPVA HP-1, and the wood veneer article gives a general background.
- Hot pressHeated platens with urea formaldehyde or modified resins, or heat cured PVAc. Short cycles and flat panels in volume. The usual route for veneered MDF and particleboard.
- Cold pressPVAc or other room temperature adhesives under a screw or hydraulic press. Longer clamp time, low capital, common in smaller shops.
- Vacuum or membrane pressA bag or membrane draws the face onto curved or shaped parts. Used for radius fronts, columns and 3D shapes, often with paper backed or thin faces.
- Contact cementFor paper backed, 2-ply and PSA sheets applied without a press. Fast for small jobs, less suitable where heat or moisture can soften the glue line.
Press temperature, pressure and time come from the adhesive maker's data sheet. Urea formaldehyde hot pressing commonly runs around 100 to 120 °C. Panels sold into the United States carry formaldehyde emission rules, so ask the panel maker for the compliance documents.
Where defects come from, by stage
Most veneer complaints can be traced to one step. Knowing the step tells you whether to talk to the slicer, the splicer or the panel maker.
| Defect | Usual stage | What it looks like | How to prevent it on the order |
|---|---|---|---|
| Rough or torn grain | Conditioning, slicing | Fuzzy patches that sand badly and stain dark | Approve a sample from the actual flitch |
| Open seams | Jointing, splicing | Visible gaps or dark lines between leaves | Specify glue line splicing on visible faces |
| Glue bleed through | Pressing | Spots that refuse stain, common on thin or porous faces | Ask for the adhesive and spread rate on a test panel |
| Sand through | Sanding | Glue line or core showing at edges or high spots | Agree the final grit and inspect edges |
| Cupped panel | Layup | Panel bows toward the face after trimming | Require a balanced back veneer |
| Barber pole | Splicing, finishing | Alternating light and dark leaves under stain | Ask for a finished sample with your stain |
How this shapes the match we make
We are a matching service, not a veneer mill. When you send an RFQ, the form you need tells us which stage of the chain to look at. Raw leaves go to slicers and flitch dealers. Spliced faces go to face splicers. Pressed panels go to laminators. We pass the spec to up to 3 suppliers that work at that stage and reply within 24 business hours.
See veneer applications for the form and match usually chosen for each end use.
What is the difference between sliced and rotary cut veneer?
Sliced veneer is cut one leaf at a time from a flitch, so leaves can be kept in sequence and matched. Rotary veneer is peeled from a turning log in one continuous sheet, which gives the highest yield and a broad, wild figure but no leaf to leaf repeat.
Why does a veneered panel need a back veneer?
A face pulls on the substrate as it moves with humidity. A back veneer of similar thickness and grain direction on the other side balances that pull and keeps the panel flat. Panels faced on one side only tend to cup.
Can a veneered panel be sanded like solid wood?
Only lightly. A standard sliced face is around 0.5 to 0.6 mm thick before pressing and sanding, so heavy sanding or aggressive grits can cut through to the glue line. Ask the supplier which grit the face leaves at and plan finishing from there.
Which splice is best for a visible face?
Glue line splicing gives the tightest visible seam and is standard for quality faces. Zigzag thread and tape splices hold leaves together for handling and pressing, and the tape is sanded off afterwards. Name the match and the visible faces on the RFQ and the supplier picks the method.
Related guides
- Cuts and Grain
Rotary vs Plain Sliced vs Quarter vs Rift Cut Veneer
How rotary, plain sliced, quarter, rift and half round veneer are cut, what figure each gives, how wide the leaves run, how yield sets price and how to specify.
- Grades and Matching
Wood Veneer Grades and Matching: Book, Slip and Face Grades
What veneer face grades allow, which standards define them and how book, slip, random and balance matching change the look, the waste and the price of a panel.
- Choosing a Supplier
What to Check in a Veneer Sample Before You Order in Bulk
How to check a wood veneer sample for species and cut, color range across the flitch, grade markers, backing, repeat size and whether it is the actual flitch.
- Ordering
How to Store Wood Veneer Without Cracking or Warping
How to store wood veneer in a shop: keep flitches flat, buffer humidity, avoid direct light, and organize multi-flitch stock so matched sets stay in sequence.
Know which stage you are buying from?
Send the species, cut, form, match and square footage. We pass it to up to 3 veneer suppliers that work at that stage and reply within 24 business hours.
Send my veneer RFQ