Cottons with and without an additive were processed through spinning at two spindle speeds. At the higher spindle speed dust concentration from cotton containing an additive was no different from that of cotton containing no additive, but at the lower spindle speed the dust concentration from cotton containing the additive was significantly lower. Dust concentrations from cottons both with and without an additive increased when the spindle -speed was increased but the increase was greater for cotton containing the additive.

The physical character of spinning room dust was affected to a minor degree by the additive and tie spindle speed. Generally, the mass median diameter trended lower when an additive was used or when the spindle speed was increased.