Table 3. Change in Surface and Color of the Commercial and Developed PVC Sheet After UV Exposure of 700 kJ/m²

	Gloss (GU)		Gray Scale (Grade)		∆E
	Before	after	before	after	∆E
Commercial	4.50	4.35	5.0	4.5	0.32
1^st-developed	4.30	4.01	5.0	2.0	8.34
2^nd-developed	4.33	4.30	5.0	4.5	1.03
3^rd-developed	4.30	4.09	5.0	4.5	1.31
4^th-developed	4.37	5.09	5.0	4.0	1.53
5^th-developed	5.41	5.33	5.0	4.5	0.35