*3.3. Antimicrobial Activity of Films Coated with Chlorphyllins*

From the results shown above, it was inferred that chlorophyllin E-140 was more efficient than E-141, provided less color change to the PET film, reduced energy consumption and, overall, was active when photoactivated with LED lights as it reduced the heating on the film and on the product. Therefore, coated films containing E-140 were selected to verify the effectiveness of porphyrin incorporated in various polymer matrices. For this purpose, two methods were used: the agar diffusion method and the surface disinfection method.
