The 1.0% SFHP-coated chips treated with CaCl2 of different concentration presented various Force-Time plots (Fig. 1c). When CaCl2 concentration was increased from 0 to 0.10 mol/L, the brit-tleness and crispiness of chips were considerably increased. The
curve shape of 0.05 mol/L CaCl2 was similar to that of uncoated chips except for missing of Tootsie Roll. The reason can be the higher moisture content retained inside, which reduced pliability of chips. The chips treated with 0.10 mol/L CaCl2 had the highest brittleness and crispiness, which means a high initial resistance due to formation of crisp pectin crust. Chips treated with 0.50 mol/L CaCl2 was the least brittle and least crisp decreased, since SFHP crust was significantly harder. In addition, high water content has inhibited the interaction between starch, protein and lipid, result-ing in loss of pliability.