Annals of Forest Science

Table 2 Thresholds of topographic parameters to define acceptable finished surface quality for consumers and industrials (planed and sanded surfaces mixed together)

From: Visuo-tactile and topographic characterizations of finished wood surface quality by French consumers and industrials: acceptability thresholds for raised grain

		For consumers			For industrials
Beech	Parameters	Equations	R	NG ≥ 5/10	Equations	R	NI ≥ 8/10
	Sk (μm)	NG = 6.68–0.13*Sk	− 0.67*	Sk ≤ 12.92	NI = 10.37–0.25*Sk	− 0.76**	Sk ≤ 9.48
	Vmc (ml/m²)	NG = 8.16–0.5*Vmc	− 0.7*	Vmc ≤ 6.32	NI = 13.19–0.94*Vmc	− 0.78**	Vmc ≤ 5.52
Oak	Sk (μm)	NG = 8.75–0.18*Sk	− 0.75***	Sk ≤ 21.42	NI = 14.36–0.33*Sk	− 0.83***	Sk ≤ 28.57
	Ssk (−)	NG = 3.14–0.44*Ssk	− 0.51*	Ssk ≤ − 4.27	NI = 3.29–1.13*Ssk	− 0.79***	Ssk ≤ − 1.52
	Vmc (ml/m²)	NG = 10.68–0.65*Vmc	− 0.76***	Vmc ≤ 8.73	NI = 18.12–1.23*Vmc	− 0.85***	Vmc ≤ 10.65

Thresholds for an acceptable surface quality: 5/10 for consumers, 8/10 for industrials; NG: consumers’ scores; NI: industrials’ scores. R: correlation coefficient; ***significant at 0.1% level; **significant at 1% level; *significant at 5% level

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ISSN: 1297-966X

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