Evaluation of trash content characteristics of egyptian cotton grades using ccs

Four lint cotton grades; Fully Good (FG), Good (G), Fully Good Fair (FGF) and Good Fair (GF) of Egyptian cotton varieties; Giza 92, Giza 94 and Giza 95. The aim is to study the relation of cotton trash properties with cotton fiber and yarn strength properties using CCS. The results showed that there is high association between cotton trash attributes with lint cotton grades. Approximately, most of cotton fiber properties were the best for Giza 92 followed by Giza 94 and Giza 95 in terms of values of mean, least significant difference and coefficient of variation. There were highly strong correlation between trash properties and both of fiber properties and yarn strength; such as upper half mean. Yellowness and elongation gave no noticeable differences towards increasing or decreasing of trash properties. Cotton grade factor (GF) for each grade for Giza 92, Giza 94 and Giza 95 was calculated. Giza 92 had the highest value of calculated cotton grade factor followed by Giza 94 and the last one was Giza 95. Hence the grade factor could be a good rank of lint cotton grades, but the rank of cotton varieties would be unreal.