The L value describes lightness and is equal to zero for black and
100 for white. This corresponds to the intensity of light recorded by
the human eye. The values of L changed slightly for all varieties.
Most of the time, the traditional frying system produced chips that
were lighter in color with greater L values than the chips that were
vacuum fried. ATX 854 04-8W was the only variety that produced
chips with similar L values for both traditional and vacuum frying
conditions. The White-rose variety, on the other hand, produced
chips with different L values, that is, 38.3 (darker chips) and 46.2
(lighter chips) for the traditional and vacuum systems, respectively.