Table 1.

Color change after simulated aging process in CIE-Lab coordinate system.

Amount of Cellulose	Type of Aging Process	L	a	b	dL	da	db	dE ab
0 phr	thermo-oxidative	88.83	−3.84	14.63	−0.65	0.67	−0.69	1.16
	weathering	66.05	11.38	45.66	23.43	15.89	30.34	41.49
2 phr	thermo-oxidative	77.73	−269.00	18.86	−0.12	0.97	−4.03	4.15
	weathering	55.12	11.38	36.03	27.73	15.04	14.14	30.70
5 phr	thermo-oxidative	74.98	−2.95	19.29	3.48	1.65	−7.19	8.15
	weathering	53.69	11.15	33.52	17.81	15.75	7.05	24.80
10 phr	thermo-oxidative	72.02	−4.14	23.22	1.40	0.23	−2.26	2.66
	weathering	47.44	12.22	24.60	23.18	16.58	−0.87	28.51
15 phr	thermo-oxidative	70.51	−3.48	20.36	−0.02	0.45	−4.80	4.82
	weathering	48.87	10.86	22.14	21.67	14.79	−3.01	26.40
20 phr	thermo-oxidative	74.44	−3.54	23.60	4.20	−0.05	−9.28	10.18
	weathering	52.53	9.04	17.19	17.72	12.54	15.69	26.78