2.3.2. Measurements of the M. alba extract color
Color values of the mulberry fruits extract were measured using a spectro-colorimeter (Model JS555, Color Techno System Corporation, Tokyo, Japan) tristimulus color analyzer calibrated with a white porcelain reference plate. The visible reflectance spectra(380–770 nm) were obtained through a silicon check photocell and a pulsed xenon lamp as a source of illumination (illuminant D65, 0 view angle, illumination area diameter 8 nm). Based on the spectra, the apparatus calculated and returned the color parameters. The color coordinates of the uniform color space CIELAB L*, a*, b* were determined by its reflectance (L*) and chromaticity
(a* and b*). The L* value indicates brightness ranging from black (L* = 0) to white (L* = 100). The a* value ranges from 60 (green) to 60 (red) and b* value ranges from 60 (blue)–60 (yellow).
All experiments were done in triplicate.