A review of published research on gin cleaning practices shows that their general effects on textile quality have been established. As the amount of gin lint cleaning increases nep counts, short fiber content and dyeing problems tend to increase. Also, yarn appearance, yarn strength and staple length tend to decrease with increasing gin cleaning. These effects are mediated by differences in varieties, cultural practices, harvest practices and growing year. Even though these general effects are known, specific relationships are not well enough established to be able to reliably predict textile quality from current fiber measurements.