Fig. 7From: Friction characteristics between metal tool and wood impregnated with phenol formaldehyde (PF) resin during exposure to high pressureAppearance of the wood specimens after friction coefficient (µ) measurements. The triangles indicate those specimens with cured surfaces. Dotted circles indicate end grains of the specimens where phenol formaldehyde (PF) resin is seeping onto the specimen surfaceBack to article page