Also called optical fiber. Itself has the ability to resist ultraviolet damage of fiber. The fiber is rich color, bright luster, 500 hours strength reached 60%, the deeper the color, to absorb ultraviolet light, the more the ultraviolet shielding, the better. This method of fabric effect lasting and feel better, but for processing requirement is high, the cost is high, does not apply to natural fibers, when blended effect is difficult to control.