The pressure history showed the same behavior and values for
the three temperatures studied with a minor difference right after
immersion of the potato chips. During the depressurization period,
the pressure was lowered from 101.6 ± 0.15 kPa to 1.4 ± 0.06 at a
rate of 1.9 ± 0.06 kPa/s. Once the desired pressure was achieved,
the potato slices were submerged into the oil causing vapor release
and a short increase in pressure of about 7–10 kPa; the raise in
pressure was more pronounced at the highest frying temperature
(140 C) due to faster water vapor loss to the headspace