while fiber length, strength and fineness are most frequently correlated to yarn properties, the trash content of cotton can also affect the maximum achievable yarn count. Due to the high angular speeds encountered by fibers during spinning, trash particles can cause fiber breaks by exerting centrifugal force on the forming yarn. Foreign matter and neps increase yarn unevenness and ends down in spinning, which decrease production efficiency and increase imperfections in fabrics. For ring spinning , finer yarns are particularly susceptible to end breaks due to the presence of trash in the roving.