Brushing/Napping are mechanical finishes where wire hooks are used to pull fiber from twisted yarns to raise the look of the material. Each material is treated based on the customer’s request and may be napped on one or both sides to achieve a desired look or feel. Napping should be on spun yarns vs filament yarns as fibers cannot be raised from filament yarns.
Sanding is a mechanical abrasion to the surface of a textile to achieve a certain appearance. Sanding can range from a scratch only to an aggressive weight reduction.
Shearing is the mechanical action of cutting fibers to a desired length uniformly across the width and length of a material.