Table 1
(a) High and Low Levels for Six Parameters Tested in a Resolution III, Two-level Fractional Factorial Design

LevelPPF MnNVP/PPFBF/polymerBF TypeBP/PPFNaCl

+40000.7 ml/g2/8DBF0.5%30%
20000.5 ml/g0MBF0.1%0

(b) Combinations of the Experimental Variables in the Resolution III, Two-level Fractional Factorial Design

FormulaPPF MnNVP/PPFBF/polymerBF TypeBP/PPFNaCl

1++++++
2++none
3+++
4+none+
5+++
6+none+
7++
8none++