Mofizur Rahaman Akash
B.Sc in Textile Engineering
Cell: +88 01818766765
Email: akashcox@yahoo.com

Count is a numerical value, which express the coarseness or fineness (diameter) of the yarn and also indicate the relationship between length and weight (the mass per unit length or the length per unit mass) of that yarn. Therefore, the concept of yarn count has been introduced which specifies a certain ratio of length to weight. Thread count is expressed by warp and weft yarn. Thread count is very important for GSM and cover factor. But the GSM and cover factor are also depend on the thread density.

From the Table-1 and Figure-1; we have seen that the highest warp count is 40 Ne of Plain and the lowest warp count is 8 Ne (16+16) of Boxy. Also we see that the highest weft count is 40 Ne of Plain and the lowest weft count is 5 Ne (10+10) of Ottoman. Ne (English Count) is the indirect system. In theoretically higher Ne must be finer than lower Ne. So all the results we have collected regarding thread count comply with the theory.

Table-1: Thread count of different types of woven fabric
 Sample Thread count Warp Weft Dobby 32 20 Boxy 16+16=8 16+16=8 Rib stop 21 21 Oxford 40+40=20 30/2=15 Plain 40 40 3/1 LHT 16 12 Zigzag twill 22 22 Bedford cord 20 16 2/1 RHT 20 20+70D=16 Ottoman 16 10+10=5
 Figure-1: Thread count chart of different types of woven fabric
Thread density is the number of warp and weft threads per inch of woven fabric. Thread density is denoted by EPI and PPI. It is very important for GSM and cover factor. But the GSM and cover factor also depend on the thread count.

From the Table-2 and Figure-2; we have seen that the EPI is always greater than PPI. The highest EPI is 154 of Bedford cord and the lowest EPI is 100 of ottoman. Also we see that the highest PPI is 85 of Dobby and the lowest PPI is 48 of 2/1 RHT. In theoretically EPI must be greater than PPI. EPI is greater than PPI in our result. So all the results we have found in thread density comply with the theoretical concept.

Table 2: Thread density of different types of woven fabric
 Sample Thread density EPI PPI Dobby 152 85 Boxy 108 56 Rib stop 110 72 Oxford 120 80 Plain 133 72 3/1 LHT 116 56 Zigzag twill 133 68 Bedford cord 154 80 2/1 RHT 120 48 Ottoman 100 49
 Figure-2: Thread density chart of different types of woven fabric
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Mazharul Islam Kiron is a textile consultant and researcher on online business promotion. He is working with one European textile machinery company as a country agent. He is also a contributor of Wikipedia.