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Long, strong fibers with a rough texture and a knot-like appearance.

Irregular, crimped surface with a variable cross-section that mimics wool.

Smoother, shinier than cotton with a serrated edge in cross-section.

Visible dislocations or 'knots' along the length with a polygonal cross-section often showing a central canal.

Similar in appearance to rayon and cotton but with a more rounded cross-section and fewer striations.

Long, smooth, cylindrical fiber with a triangular cross-section.

Smooth, round, and hollow in cross-section, with evidence of longitudinal striations.

Clear longitudinal striations and a fine, silky appearance with a polygonal cross-section.

Flat, twisted ribbon-like shape with irregular edges.

Scales on the fiber surface and a medulla present.

Smooth, segmented polyurethane with a clear appearance under the microscope.

Resembles a bamboo stalk with nodes and a polygonal cross-section.

Smooth surface with a shaped cross-section depending on the fiber type.

Smooth, shiny surface with a round or bean-shaped cross-section.