Comparison of the evenness, faults and hairiness of compact and conventional spun ring yarns This paper is a comparative study of the optical evenness, optical yarn faults (thin place, thick place and neps) and hairiness properties of compact and conventional spun yarns. Carded cotton, combed cotton, modal, polyester, tencel and viscose rovings were used as raw material in the study. Compact and conventional spun ring yarns were produced at three yarn counts having three twist levels. In order to compare the physical properties of compact spun carded and conventional spun combed cotton yarns one type of cotton raw material was used in the spinning. Results showed that compact yarns have less optical evenness, optical faults and hairiness than conventional spun ring yarns. In addition to this, compact spun carded yarns have significantly higher evenness, thin places, thick places, neps values and less hairiness than conventional spun combed yarns.