Table 1. Response variables, actual and coded factors, experimental design, and response data

A. Response variables, actual and coded factors, and the levels of the factors
Response variables	Actual factors	Coded factors	Actual factor level corresponding to the coded factor level of
			−1	0	1
Y1=Particle size	F1=Speed of primary homogenization (rpm)	X1	5,000	10,000	15,000
Y2=Zeta-potential	F2=Concentration of emulsifier (%)	X2	0.1	0.2	0.3