Selection of Yarn Count for Various GSM for Different Fabrics
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
|
