Table 1.

Surface color parameters of FDM-printed WPC parts at various printing speeds.

Code	Printing Speed (mm/s)	L*	a*	b*	ΔE*
WPC30	30	54.2 ± 0.7 c	15.8 ± 0.5 a	22.2 ± 0.2 a	-
WPC50	50	55.7 ± 0.6 b	15.7 ± 0.5 a	22.1 ± 0.1 a	1.6 ± 0.5 b
WPC70	70	57.1 ± 0.7 a	15.4 ± 0.2 a	22.4 ± 0.3 a	3.0 ± 0.7 a

The values are the mean ± SD (n = 5). Different letters (a, b, and c) within a column indicate a significant difference at p < 0.05.