Kenaf is a bast fiber covered by heading 5310 alongside jute, so a jute-kenaf blend woven fabric would still classify here provided neither flax, true hemp, nor ramie predominates. If the blend includes a fiber from an excluded category in sufficient quantity to change the essential character, the Section XI notes and the chief weight rule would determine the correct heading.

Unbleached fabric (531010) is greige cloth that has not undergone any bleaching, dyeing, or finishing beyond basic weaving. Any subsequent treatment — bleaching, dyeing, printing, or coating — moves the fabric to 531090. Most commodity burlap used in packaging enters as unbleached, while decorative or treated jute cloth falls under 531090.