# Textile Calculation

Problems and solutions of textile

## How to Select Yarn Count for Specific Fabric GSM

How to Select Yarn Count for Specific Fabric GSM
Rofiquzzaman Raju
Fabric Technologist,
B.J.Group, Mawna, Gazipur
Chittagong Textile Engineering College

Yarn Count:
Yarn count is very useful to know the condition of yarn. I mean, yarn is thick or thin. So we can define count in the following way,

The yarn count is a numerical expression which indicates the coarseness or fineness of a yarn.

Fabric GSM:
GSM means Grams per Square Meter. Fabric GSM means weight of one square meter fabric in grams. GSM plays an important role in textile industry. It is widely used in case of knit fabric measurement. By this we can compare the fabrics in unit area which is heavier and which is lighter.

How do Select the Correct Yarn Count for Your Specific Fabric GSM?
How to select yarn count for specific fabric GSM is a very common and technical task for textile engineers. By the using following formula you can easily select the actual yarn count for knit the fabric. These are varying for fabric types.

Single Jersey:
Say, the require GSM is 160

Yarn count = (-0.141) X (GSM) + 50.22
= (-0.141) X (160) + 50.22
= -22.58 + 50.22
= 27.66

So, to knit 160 gsm single jersey fabric we need yarn count 27.66/s

Interlock:
Say, the require GSM is 220

Yarn count = (-0.206) X (GSM) + 80.56
= (-0.206) X (220) + 80.56
= -45.32 + 80.56
= 35.24

So, to knit 220 GSM Interlock fabrics we need yarn count 36/s

Pique:
Say, the require GSM is 220

Yarn count = (-0.146) X (GSM) + 57.16
= (-0.146) X (220) + 57.16
= -32.12 + 57.16
= 25.04

So, to knit 220 GSM Pique fabric we need yarn count 36/s

1*1 Rib:
Say, the require GSM is 220

Yarn count = (-0.123) X (GSM) + 54.57
= (-0.123) X (220) + 54.57
= -27.06 + 54.57
= 27.51

So, to knit 220 GSM 1x1 Rib fabrics we need yarn count 28/s

Double Lacoste:
Say, the require GSM is 220

Yarn count = (-0.167) X (GSM) + 64.36
= (-0.167) X (220) + 64.36
= -36.74 + 64.36
= 27.62

So, to knit 220 GSM Double Lacoste fabrics we need yarn count 28/s

Lycra 1×1 Rib:
Let, required fabric GSM is 180

Yarn Count = (-0.119) GSM + 59.12
= (-0.119) x 180 + 59.12
= -21.42 + 59.12
=37.7

Lycra 2x2 Rib:
Say, the require GSM is 220

Yarn count = (-0.108) X (GSM) + 56.62
= (-0.108) X (220) + 56.62
= -23.76 + 56.62
= 32.86

So, to knit 220 GSM Lycra 2x2 Rib fabrics we need yarn count 32/s