CIE L*a*b* color measurement of date syrup
The CIE L*a*b* color values for date syrup prepared
by autoclaving, enzyme treatment methods and the
concentrated syrup, were measured with a Mcbeth
Color Checker as per the procedure described by Al-
Hooti et al. (1997a, 1997b). Under this tristimulus color
216 S.N. Al-Hooti et al. / Food Chemistry 79 (2002) 215–220
coordinate system, the L* value is a measure of lightness
and varies from 0 (black) to 100 (white); the a*
value varies from 100 (green) to +100 (red); and the
b* value varies from 100 (blue) to +100 (yellow). As
the values of a* and b* rise, the color becomes more
saturated or chromatic, but these values approach zero
for neutral colors (white, grey or black).