How To Choose A Finger Joint Board

1. Check the tooth shape and surface smoothness:

Concealed teeth are preferred: the joints are hidden inside, and the surface is smooth and unmarked after painting; exposed teeth are prone to unevenness after painting and are only suitable for base layers or concealed areas.

Board inspection: The surface should be smooth without warped corners, the seams should be tight and straight, and there should be no delamination, carbonization, or obvious color differences or breaks.

2. Choose the right wood material:

Hardwood is better than softwood: Rubberwood, ash, and other hardwoods have good stability and beautiful grain, making them suitable for furniture panels; pine and fir are soft and easily leave marks, and are mostly used for cabinet interiors or shelves.

Knotted vs. knot-free: Knot-free boards are beautiful but expensive; knotted boards (with natural knots) have a more natural feel and are more cost-effective. It is necessary to confirm that the knots are secure and there is no risk of them falling off.

Treatment rings: Clear and appropriately spaced growth rings in the heartwood usually indicate a longer tree age and a denser, more stable material. 3. Strict Control of Environmental Protection and Moisture Content

Environmental Standards: Adhere to national standards and require suppliers to provide CMA-certified testing reports.

Key Moisture Content: Moisture content should be controlled between 8% and 12% (adjust according to local climate). The surface should not feel cold to the touch, and the sound when tapped should be crisp and not muffled. Excessive moisture content can easily lead to cracking and deformation later.

Glue Odor: High-quality finger-jointed boards use milky white glue with only a faint woody fragrance; if there is a pungent sour smell or a strong glue smell, it indicates that inferior glue was used or the drying process was incomplete.

4. Clearly Define Usage Scenarios

Use with Caution for Cabinet Doors: Finger-jointed boards have limited bending strength. Using them extensively for wardrobe/cabinet doors is extremely prone to deformation. It is recommended to use them only for cabinet bodies, drawer bottoms, or small-span shelves.

Thickness Selection: Standard thickness is 16mm-25mm. For load-bearing shelves, a thickness of ≥25mm is recommended, with additional support to prevent sagging in the middle.