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Official Journal of the Japan Wood Research Society

Table 3 Mean surface roughness parameter (S a) of black spruce prepared by sanding with three-stage programs and four three speeds

From: Evaluation of two surfacing methods on black spruce wood in relation to gluing performance

Sanding program

Feed speed (m/min)

S a (μm)

80-grit

4

8.8a (0.2)bEc

10.5

10.8 (0.2)G

17

11.9 (0.2)H

80-100-grit

4

7.5 (0.1)D

10.5

8.9 (0.1)EF

17

9.3 (0.1)F

80-100-120-grit

4

5.4 (0.1)A

10.5

6.4 (0.1)B

17

6.8 (0.1)C

  1. aMean of 30 replicates
  2. bStandard error of the mean in parentheses
  3. cMeans followed by the same letter are not significantly different at 5 % probability level