Table 2 shows the results of the colour evaluation using the L*, a*
and b* parameters at days 0, 6, 9 and 12. No significant differences
were observed between lot 1 and the other lots. Until day 12, the L*,
a* and b* parameters were similar between the lots. As expected,
therewere no significant colour changes in the hamburgers from all
lots after 12 days of storage. During this time, the hamburgers
discoloured due to the oxidation of myoglobin caused by the
presence of oxygen in the MAP. However, visual analysis determined
that the colour of the hamburgers in lots 3 and 4 was more
attractive than that of lots 1 and 2 at day 12. Table 4 describes the
hamburgers colours at day 0 and 12.