Compression rolling of Sitka spruce and Douglas-fir

The effects of compression rolling on timber properties are broadly predictable, but while it is possible to exercise general control over the deformation processes, the effects are localized both with respect to micro-structural modification and to the physical properties. The deformation induced is as much a function of the timber characteristics (density, homogeneity, permeability, moisture content, and grain orientation) as of the rolling parameters. Compression rolling of Sitka spruce and Douglas-fir illustrates such behavior.

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