The polynomial models for the optimum cooking time, mass increase, loss of solids and chromaticity coordinates a* and b* of fresh spaghetti prepared with different proportions of DPP, EPP and AF were significant (P 0.05) and had coefficients of determination (R2) greater than 0.96 (Table 3). The effects of the amounts of DPP, EPP and AF were significant for all the models analyzed. The interaction between DPP and AF was significant for models of optimum cooking time, mass increase, loss of solids and the b* color coordinate. However, the model for lightness (L*) was not ignificant. There was a significant lack of fit in models for mass increase, and color coordinates a* and b*; however, they were considered irrelevant due to their low experimental error mean square values.