Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 4 Coefficients of determination (R ²) and root mean-square errors (RMSE) of regression curves using Eq. (9) for color changes of keyaki and sugi wood at 180 °C

From: Kinetic analysis of color changes in keyaki (Zelkova serrata) and sugi (Cryptomeria japonica) wood during heat treatment

	Keyaki wood		Sugi wood
	R ²	RMSE	R ²	RMSE
L*	0.9938	0.294	0.9962	0.634
a*	0.9957	0.721	0.9142	0.307
b*	0.9970	0.335	0.9740	0.542
\( \Updelta E_{ab}^{*} \)	0.9964	0.743	0.9967	0.614

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