Fecha de publicación: 05/06/2020 Fuente: WIPO "organic farming" ABSTRACTMETHOD OF PREPARING ANTI-MICROBIAL FACE MASKThe present invention provides a novel and improved method of making biodegradable face mask wherein the steps comprises heating water with at least one antimicrobial plant extract to prepare dye bath; immersing organic fibre into the dye bath for 10- 20 minutes; adding one or more herbal mordant to the bath; subjecting the bath to a heat treatment for at least 45-60 minutes to obtain dyed fibre; and converting the dyed fibre into nonwoven fabric. Further, the present invention provides a biodegradable face mask made comprising plurality of layers made of nonwoven fabric; an inner layer having at least one antimicrobial agent; and one or more mordant.