RGB values of dry and hydrated edible films were first
modeled using cluster analysis. These statistical techniques
group similar observations based on the behavior of the
variables, in this case intensities of red, green, and blue
fields of the RGB model. Figure 7b, d show the results of
the cluster analysis. Three conglomerates were obtained
with dry edible films and four conglomerates with hydrated
films. The films with design concentration (2.4 mg/cm2
). The latter indicates that the optical response
of the films prepared with the recommended design
concentration is appreciably different from other surface
concentrations