Fig. 7

Color coordinates (L*, a*, and b*) of fresh and dried henna leaves for both drying systems at different layer thicknesses (LT). Whereas (L) is the lightness, (a) is the redness, and (b) is the yellowness.

Color coordinates (L*, a*, and b*) of fresh and dried henna leaves for both drying systems at different layer thicknesses (LT). Whereas (L) is the lightness, (a) is the redness, and (b) is the yellowness.