Effect of moisture content on treatability of Japanese red pine, Japanese larch, and ezo spruce with chromated copper arsenate

The effect of wood moisture content (MC) on treatability with chromated copper arsenate was investigated for commercially important softwood species (Japanese red pine, Japanese larch, and ezo spruce) in Korea. The optimum MC of heartwood for treatment varied somewhat for different species. Much of the variation in heartwood treatment could be explained by inherent wood characteristics related to permeability rather than wood MC. Therefore, drying wood to MCs below the fiber saturation point would appear to be uneconomical.