Table 1.

Face-centered central composite design (FCCD) used for the optimization of temperature and filler content independent factors with coded values.

Sample ID	Point Type	Temperature	Filler Content
1	Factorial	−1	−1
2	Factorial	1	−1
3	Factorial	−1	1
4	Factorial	1	1
5	Axial	−1	0
6	Axial	1	0
7	Axial	0	−1
8	Axial	0	1
9	Centre	0	0
10	Centre	0	0
11	Centre	0	0
12	Centre	0	0
13	Centre	0	0