Central Composite Design of Spraying Process to Laminate the Paper Substrates with Cellulose Nanofibers (CNF) as Green Packaging Wrap

Table 7

Response 2: thickness of coat.

Source	Sum of squares	df	Mean square	value	value
Model	6575.47	3	2191.82	18.50	≤0.0001	Significant
: suspension concentration	5490.53	1	5490.53	46.34	≤0.0001
: fiber diameter	1077.78	1	1077.78	9.10	0.0082
: distance between spray gun and surface	7.15	1	7.15	0.0604	0.8090
Residual	1895.63	16	118.48
Lack of fit	1895.63	11	172.33
Pure error	0.0000	5	0.0000
Cor total	8471.10	19

Factor coding is coded. Sum of squares is type III-partial.