Experiment Number	Coded variables			Actual values
Experiment Number	X₁	X₂	X₃	Extraction temperature (˚C)	NaCl (%)	Pulp amount (%)
1	−1	−1	−1	35	6	21
2	+1	−1	−1	55	6	21
3	−1	+1	−1	35	24	21
4	+1	+1	−1	55	24	21
5	−1	−1	+1	35	6	79
6	+1	−1	+1	55	6	79
7	−1	+1	+1	35	24	79
8	+1	+1	+1	55	24	79
9	−1.68	0	0	28	15	50
10	+1.68	0	0	62	15	50
11	0	−1.68	0	45	0	50
12	0	+1.68	0	45	30	50
13	0	0	−1.68	45	15	1
14	0	0	+1.68	45	15	99
15	0	0	0	45	15	50
16	0	0	0	45	15	50
17	0	0	0	45	15	50