Coded levels and real values Independent variables Variable code -1 0 +1 Tomato juice (%)                X1 30 50 70 Carrot juice (%)   X2 30 50 70 Hydrocolloids (XG&CMC) (g/250ml) X3 0.4 0.5 0.6 XG = Xanthan gum CMC= Carboxymethylcellulose

Table 1: Coded level and real value for the Box-Behnken experiment.