# Textile Calculation

Problems and solutions of textile

## Selection of Yarn Count for Various GSM for Different Fabrics

Selection of Yarn Count for Various GSM for Different Fabrics
Raju Tex
Knitting Technologist,
B.J.Group, Mawna, Gazipur
Chittagong Textile Engineering College

Yarn Count:
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.
GSM:
GSM’ means ‘Gram per square meter’ that is the weight of fabric in gram per one square meter. By this we can compare the fabrics in unit area which is heavier and which is lighter.

Selection of Yarn Count for Various GSM for Different Fabrics
 Fabrics/GSM Plain or Single-jersey Pique 1x1 Rib Lycra 1x1 Rib Lycra 2x2 Rib Interlock 100 36.12 47.66 42.27 47.22 45.82 59.96 120 33.3 44.32 39.81 44.84 43.66 55.84 140 30.48 40.98 37.35 42.46 41.5 51.72 160 27.66 37.64 34.89 40.08 39.34 47.6 180 24.84 34.3 32.43 37.7 37.18 43.48 200 22.02 30.96 29.97 35.32 35.02 39.36 220 19.2 27.62 27.51 32.94 32.86 35.24 240 16.38 24.28 25.05 30.56 30.7 31.12

Relation among GSM, stitch length and yarn count can be derived from the following equation:

1
GSM……………………...........……, When yarn count and stitch length both are variables
Yarn count (Ne) X Stitch length

K
Or, GSM = …………………..........……….,            Where K is a constant
Yarn count (Ne) X Stitch length

Or, Yarn count (Ne) X Stitch length X GSM = K

K
Or, Stitch length = ………………………………
Yarn count (Ne) X GSM

Constant 'K' which can be derived as follows:
 Fabrics Constant K values Single-jersey or Plain 12068.509 Double Lacoste 14855.2 1x1 Rib 16431.497 2x1 Rib 19005.333 Interlock 24013.8

These values may get up and down.It maybe changed. For getting more accurate results it needs more data from different industry.