Textile processing results using cotton with different levels of bark from three different textile processing performance studies were analyzed individually to determine the economic effect of bark in cotton on textile processing. The results indicate that cotton reduced one grade due to bark content added little to processing costs with rotor spinning. However, cotton reduced two grades because of bark added somewhat more to processing cost with rotor spinning, but had a very substantial effect on processing cost with ring spinning. Aggressive cleaning of cotton can reduce processing efficiency losses (costs), but it adds to waste losses.