Table 2 shows the effect of EC and EGCG addition on
milk color before and after thermal processing as measured
by Hunter L*, a*, and b*. Hunter L* measures the change
of white and blackness between samples (100 white, 0
black). Addition of the tea extracts to raw milk caused a
slight increase in the L* value. There was no trend in the
heated samples. The Hunter a* value measures the
differences of the red and green color components (+
red, green). EC and EGCG caused a slight increase in the
color a* component for both raw and heated milk samples.
The Hunter b* color value measures the differences of the
yellow and blue color components (+ yellow, blue). The
tea extracts increased the b* component in raw samples but
had a lower value in the heated milk.