| Nominal thickness |
1.5–6.0 mm; common commercial sizes include 3.0 mm, 4.0 mm and 5.0 mm. |
Thickness affects bending stiffness, weight, machining allowance and fit within the finished assembly. |
State both nominal thickness and allowable thickness tolerance on the purchase specification. Check with a calibrated micrometer at multiple points. |
| Thickness tolerance |
Set by the applicable product standard and contract; a practical procurement target is often approximately ±0.15–0.30 mm for thin panels, subject to construction and grade. |
Tight tolerance improves lamination, nesting, edge alignment and dimensional consistency across suppliers. |
Use an agreed sampling plan and record readings from the center and four edge areas of each sampled panel. |
| Panel dimensions |
Common sheet formats range from approximately 1,220 × 2,440 mm to 1,525 × 3,050 mm, depending on the supply region and intended use. |
Sheet size influences freight utilization, cutting yield, container loading and the amount of jointing required. |
Specify length, width, squareness and diagonal difference. Confirm whether dimensions are measured before or after conditioning. |
| Veneer construction |
Balanced cross-laminated veneers; face and back grain normally run in the same direction, while core layers are oriented perpendicular to improve stability. |
Layer balance affects warping, screw-holding, bending behavior and resistance to splitting. |
Approve a construction diagram stating veneer count, approximate veneer thickness, grain direction and permitted core gaps. |
| Density |
Typically about 400–700 kg/m³ for many softwood and mixed-species plywood products; hardwood constructions may be higher. |
Density affects panel weight, stiffness, handling cost, fastener performance and shipping calculations. |
Require density reporting at a defined moisture content and test representative samples from production lots. |
| Bending strength (MOR) |
Typical values may range approximately from 25–60 MPa, depending on species, veneer quality, grain direction, thickness and test method. |
MOR indicates the maximum bending stress before failure and helps determine whether a thin panel can carry the required load. |
Specify test direction, conditioning, span, loading rate and the applicable standard, such as EN 310 or an equivalent national standard. |
| Modulus of elasticity (MOE) |
Typical values may range approximately from 4,000–10,000 MPa, varying with wood species, lay-up and grain direction. |
MOE measures stiffness and is often more important than ultimate strength when limiting deflection in shelves, skins or curved components. |
Set a minimum MOE in both principal directions when the panel will be loaded or installed with a defined span. |
| Strength direction |
Parallel-to-face-grain bending performance is commonly higher than perpendicular-to-face-grain performance; the difference depends on the lay-up. |
Incorrect grain orientation can cause excessive deflection or premature failure even when the nominal grade appears adequate. |
Show installation direction on drawings and request test data in both parallel and perpendicular directions where relevant. |
| Moisture content |
Commonly targeted around 6–14% at shipment, depending on regional climate, product standard and end-use conditions. |
Moisture variation can cause swelling, shrinkage, warping, bond stress and dimensional changes after arrival. |
Measure with a calibrated meter and confirm the conditioning environment used before testing. |
| Dimensional stability |
Low visible warping, limited edge swell and stable length/width after conditioning; exact limits should be contract-specific. |
Thin sheets are more sensitive to handling damage and moisture cycling, particularly during ocean transport and storage. |
Define maximum bow, cup, twist and edge lift, then inspect panels after conditioning and after simulated moisture exposure. |
| Bond durability |
Interior, humid-service and exterior grades require different adhesive systems and durability levels; no single glue line is suitable for every application. |
The correct bond class reduces delamination risk under humidity, heat, wetting and drying cycles. |
Specify the intended service class and request cyclic boil, water-soak or wet-strength testing where required by the applicable standard. |
| Formaldehyde emissions |
Set the required emissions class according to the destination market and product application; common regulatory frameworks use chamber or perforator test methods. |
Import regulations, indoor-air requirements and customer specifications may differ by country. |
Request a current third-party test report using the method recognized in the destination market, such as EN 717-1 or an equivalent method. |
| Surface quality |
Define face grade by permitted knots, splits, patches, discoloration, open defects, sanding marks and repaired areas. |
A clear visual grade may be needed for furniture, while lower face grades may be adequate for concealed structural or packaging components. |
Use approved physical samples or high-resolution defect standards, and state separate requirements for face, back and edges. |
| Core defects |
Limit open joints, voids, overlaps, core laps and veneer buckling according to the selected grade and intended use. |
Core defects reduce effective thickness, local strength, screw-holding and edge quality. |
Inspect cut edges and use destructive section checks on samples when internal construction is critical. |
| Surface finishing compatibility |
Specify sanding level, surface smoothness, coating compatibility and whether the panel will be painted, laminated, veneered or left exposed. |
Uneven sanding or resin contamination can cause poor adhesion, telegraphing and visible surface defects. |
Perform a trial finish using the actual coating or adhesive system before approving mass production. |
| Machining and fastener performance |
Use a stable, void-controlled lay-up for routing, drilling, stapling and screw fastening; define minimum edge distance for the finished design. |
Thin plywood has limited edge thickness, so splitting and pull-out can occur if fasteners are oversized or placed too close to the edge. |
Run application-specific pilot tests for drill diameter, screw type, staple spacing, routing speed and edge distance. |
| Packaging and transport protection |
Use flat, dry stacking with corner protection, moisture-resistant wrapping and sufficient pallet support to prevent sagging and impact damage. |
Long-distance transport can expose panels to humidity, condensation, abrasion and forklift damage. |
Agree pallet height, strap method, wrapping materials, storage conditions and container loading photos before shipment. |
| Quality acceptance plan |
Combine visual inspection, dimensional checks, moisture measurement and periodic laboratory testing. |
A documented acceptance plan makes quality comparable across countries, factories and shipment lots. |
Define sample quantity, inspection level, critical defects, major defects, minor defects and corrective-action requirements before ordering. |
