Different Fabric GSM and Their Required Yarn Count

Fabric GSM: 
GSM means Gram per Square Meter. That means the weight of fabric in gram per one square meter. Which unit is (gm/m2). It is essential to know the weight of the fabric before manufacturing and after getting the finished fabric. 

Yarn Count: 
Count is a numerical value, which express the coarseness or fineness of yarn and also indicate the relationship between length and weight (the mass per unit length or the length per unit mass) of that yarn. It is very important to know yarn count specially in knitting. 

There are given various fabric GSM and their required yarn count: 
 

S/J without lycra:

Fabric G.S.M	Yarn Count
110 - 120	40 S  – 36 S
120 - 130	36 S  - 32 S
130 - 140	32 S  – 28 S
140 - 150	28 S
150 - 160	26 S
170 - 210	24 S

 Rib without lycra:

Fabric G.S.M	Yarn Count
180 - 190	36 S  - 32 S
190 - 200	30 S
200 - 215	28 S
215 - 230	26 S
230 - 250	24 S
250 - 300	24 S

 Interlock without lycra:

Fabric G.S.M	Yarn Count
200 - 220	34 S
220 - 230	32 S
230 - 250	30 S
250 - 300	26 S

 40D Lycra Rib:

Fabric G.S.M	Yarn Count
230 - 240	32 S
240 - 250	30 S
250 - 280	26 S
280 - 300	24 S

 Lacoste without lycra:

Fabric G.S.M	Yarn Count
180 - 190	30 S
190 - 210	28 S
210 - 230	26 S
230 – 250	26 S

 40D Lycra S/J:

Fabric G.S.M	Yarn Count
180 - 190	34 S
190 - 210	32 S
210 - 220	30 S
220 – 240	28 S
240 - 250	26 S

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Calculation of Fabric GSM with GSM Cutter

Introduction: 
GSM means the weight in gram per square meter of fabric. GSM is a very important parameter for specified a certain quality of knitted fabric. The production of knitted fabric is calculated in weight. Fabric GSM calculation is a physical test. This test is done by GSM Cutter. GSM cutters are used to determine accurately the GSM (Grams per square meter) of any type of fabrics. It is very popular and easy usable GSM testing instrument used in most knitted factory.

Fabric GSM calculation by GSM cutter

How to Calculate Fabric GSM by GSM Cutter:
Now I will give procedure of fabric GSM calculation step by step,

1. Cut the fabric with the GSM cutter (gram per square inch).
2. Weight the fabric with the electric balance.
3. The cut sample is 100 sq.cm. The weight of the cut sample is multiplied by 100.
4. The result is the GSM of that particular fabric.

For accuracy test with multiple (e.g. 5 samples) samples and calculate average GSM. 

Example: 

Let, sample weight 1.5 gm 

In this situation, we have to multiply average cutting swatch weight by 100 to get actual fabric GSM. 

So, 

Fabric GSM = Average cutting swatch weight × 100
= 1.5 × 100
= 150 

So, fabric GSM by using GSM cutter is 150

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