The colour was measured using a Minolta Chromameter CR-200
and the CIE Lab system. After calibration with standard white tiles,
the Chromameter was positioned perpendicular to the patty surface,
and 10 different positions were evaluated for each sample
immediately after the package was opened. The evaluated parameters
were L*, a* and b*. L* describes the white intensity or
brightness, with values ranging from 0 (black) to 100 (white). The
a* value describes the redness (a* > 0), and b* describes the yellowness
(b* > 0). The final value was expressed as the respective
average of ten measurements.