Japanese beech

The materials selected for the experiment were Japanese beech (Fagus crenata blume) conditioned to approximate 10 percent moisture content.

In other words, the full width at half maximum is suitable to automatically evaluate wood surface roughness for wood specie such as Japanese beech.

Figure 1 shows the variation of [DELTA]L*, [DELTA]a*, and [DELTA]b* for Sitka spruce and Japanese beech with light-irradiation time [t.sub.ir].

Species L* a* Japanese cypress 69.82[+ or -]0.71 21.05[+ or -]1.23 Japanese cedar 81.01[+ or -]1.03 10.17[+ or -]1.09 Sitka spruce 77.58[+ or -]0.25 12.38[+ or -]0.95 Japanese beech 77.44[+ or -]0.91 9.80[+ or -]3.33 Hackberry 66.65[+ or -]0.11 8.98[+ or -]1.48 Species b* Japanese cypress 17.85[+ or -]2.08 Japanese cedar 22.49[+ or -]1.17 Sitka spruce 20.25[+ or -]0.79 Japanese beech 21.59[+ or -]1.70 Hackberry 20.35[+ or -]1.14 Table 2.

grosseserrata) and Japanese beech (Fagus crenata) were sanded using various grades of coated abrasives and the parameters of surface roughness were estimated using both the proposed and conventional methods.

grosseserrata) and Japanese beech (Fagus crenata) were sanded on a tangential or radial surface using coated abrasives (P80, P120, P150, P180, P240, P320, and P400).

Figure 7 shows the estimates of [R.sub.a], [R.sub.y], S, and [S.sub.m] for the samples of Japanese beech. It can be seen that the estimates obtained from both the conventional and deep-valley-removed roughness profiles showed good correlation with grit number.