Table 1.

Average surface roughness parameters S_a and S_dr measured on samples from acrylonitrile-butadiene-styrene (ABS), polylactic acid (PLA) and Wood-PLA, non-sanded (NS) and sanded (S) surface, non-treated (NP) and treated with plasma (P).

	NP	P			Sdr NP[%]-Sdr P[%]
	Sa [µm]	Sa [µm]	avg ∆	STD	avg ∆	STD
PLA, NS	14.85	13.87	0.99	0.48	45.83	29.95
PLA, S	14.66	14.48	0.18	1.24	−1.37	34.72
Wood-PLA, NS	25.03	26.37	−1.34	1.33	−48.37	51.95
Wood-PLA, S	19.03	19.95	−0.92	1.00	−34.94	22.69
ABS, NS	26.23	28.15	−1.92	3.32	−42.28	32.43
ABS, S	17.10	16.89	0.21	2.35	−37.32	23.88