Oaxacan master weaver Bulmaro Pérez Mendoza uses natural elements, including the Purpura pansa snail, to achieve the perfect purple. (See July 15 event listing at right.) Photograph courtesy of Bulmaro Pérez Mendoza.

Oaxacan master weaver Bulmaro Pérez Mendoza uses natural elements, including the Purpura pansa snail, to achieve the perfect purple. (See July 15 event listing at right.) Photograph courtesy of Bulmaro Pérez Mendoza.

Oaxacan master weaver Bulmaro Pérez Mendoza uses natural elements, including the Purpura pansa snail, to achieve the perfect purple. Photograph courtesy of Bulmaro Pérez Mendoza.