S10B -Silk Duppioni. Medium weight. 100% Silk. By the yard. 4 colors. Duppioni is a plain weave silk fabric, produced using fine yarn in the warp and uneven yarn reeled from two or more entangled cocoons in the weft. Fabric is textured with slubs and easy to work with. White, blue, and peach are 45" wide. Mauve is 52" wide.