Northeastbirch is tawny, growth ring slightly obvious. Shiny wood, straighttexture, fine structure and uniformity, poor hardness.
Appearance: diffuse-porous wood, half ring hole material tendency obvious, growth ring slightly obviously, heartwood red brown to purple brown, sawdust water extract of red;
Another piece called Trace, some abstract, is the image like old tree's growth ring, water's wave or wind's mark.
In this paper, the moisture content and its distribution of each growth ring in air dried wood specimens have been tested by using X-ray scanning densitometer.
The measurement of power spectra of growth ring demonstrates the variations of period every 2.5, 3.2, 6.3 year under the influence of climatic factor.
