Luster: Producing bright, semi-dull, or full-dull fibers by modifying the fiber cross-section or adding delustrants (e.g., TiO₂).
Dyeing Performance: Customizing fibers for high dye-uptake rate or uniform dyeability to achieve rapid dyeing or superior color fastness.
Hand Feel: Achieving softer or stiffer handles by adjusting fiber flexibility/rigidity.