Quality properties of fried potatoes are of major
importance for the food industry. The colour of the fried
potatoes and potato chips is one of the most signi®cant
quality factors of acceptance for fried products. In
particular, there are speci®c values of lightness for chips,
which have been established in the food industry. Heat
and mass transfer phenomena take place during frying
cause physicochemical changes, which aect the colour
of the fried products. Process variables such as oil
temperature, oil type and sample dimensions are expected
to aect the colour of the fried products.