Previous studies of the color change during heat treatment showed similar results. Avila and Silva (1999) examined the color degradation of peach puree as affected by heat treatment.
Peach puree became darker, corresponding to a decrease in L value and an increase in a value, with increasing temperature. Moreover, the loss of yellowness was also expressed by a decrease in the b value. They concluded that the major causes of color change were due to carotenoid degradation and non-enzymatic browning (Maillard).