measurementTests were performed at room temperature on single fiber bun-dles. Precise diameter measurement is a major challenge for asingle natural fiber bundle. Unlike synthetic fibers, natural fibersare characterized by irregular shapes and textures along with theirlengths as well as non-uniform thickness Nat-ural fibers also have inherent defects within themselves
Moreover, a single fiber bundle consists of a large number ofelemental fibers attached together by the matrix of lignin and hemi-cellulose. Hence, the single fiber bundle’s cross-sectional geometry,in general, is not circular