Finger-Jointed Board Structure

Finger-jointed board is a type of solid wood panel created by vertically joining multiple wood pieces using interlocking, sawtooth-like joints-a design that resembles interlaced fingers. While finger-jointed boards serve the same purposes as blockboards, they require significantly less adhesive during production, making them a more eco-friendly alternative; consequently, an increasing number of people are choosing finger-jointed boards over blockboards. Common thicknesses include 12mm, 14mm, 16mm, and 20mm, with a maximum thickness of 36mm; the standard range is generally 12–36mm.
These boards do not require plywood facings on the top or bottom surfaces, which drastically reduces adhesive usage. The adhesive typically employed is a milky-white glue-specifically, an aqueous solution of polyvinyl acetate (PVA).
Finger-jointed boards are categorized into "knotted" and "knot-free" varieties; knotted boards feature visible knots, whereas knot-free boards do not.
A simple way to assess quality is to examine the growth rings in the core material: most finger-jointed boards are made of Chinese fir, which has distinct growth rings. Wider growth rings indicate an older tree and, consequently, superior material quality.
Camphor wood finger-jointed boards are also available on the market; often used for wardrobe shelving, they act as a natural insect repellent, eliminating the need for mothballs. However, they are more expensive and sold by only a limited number of vendors.
Finger-jointed boards come in "exposed-joint" (visible teeth) and "concealed-joint" (hidden teeth) varieties. Concealed joints are superior because exposed joints are prone to unevenness after painting, although concealed joints are more difficult to manufacture. Generally, harder wood yields a better board, as it is less prone to warping and often features a more attractive grain pattern.