During storage, thermal effects can cause changes in color characteristic which can be used as a quality parameter of the food
product. Fig. 5 shows the changes in L⁄
, a⁄ and b⁄ color parameters
during storage of UHPH-treated apple juice over 60 days.
Original L⁄ a⁄ and b⁄ values were found to be 54.99 ± 0.04,
1.63 ± 0.04, 56.35 ± 0.12, respectively. After UHPH processing
L⁄
a⁄
b⁄ were 55.65 ± 0.12, 1.67 ± 0.06, 57.43 ± 0.13.