It is interesting to note that the frying time was relatively shorter
(3 min) in the case of vacuum drainage because the water vapour is
continuously released from the product even after discharge from
the oil. Draining the product under vacuum for 6 min sufficiently
reduced its moisture content to the targeted value. In the latter case,
however, no moisture loss took place after the product is lifted from
the oil, due to water vapour condensation. Hence, a longer frying
time (4 min) is needed to produce product having similar moisture
content to the former