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Garments Manufacturing & Care

How to Find GSM of Fabric with and without GSM Cutter

ByMd.Asad Ullah Meem
HOW TO FIND GSM OF FABRIC WITH AND WITHOUT GSM CUTTER

GSM is the short form of Grams per Square Meter. Fabric GSM is used in the RMG sector to compare fabrics in an unit area. Then, this value is used to calculate the total fabric weight consumption for that particular apparel, for example, a t-shirt.

A simple understanding of fabric GSM is that if we cut a piece of fabric in an area of 1 square meter & weight it, the respected value of that weighting will be the fabric GSM of that fabric. GSM is calculated in metric measurement unit.

Normally there are two methods of calculating fabric GSM. Which are –

  1. With GSM Cutter
  2. Without GSM Cutter

In this article, we’ll take a look at how to find GSM of fabric without fabric cutter and how to do GSM calculation with GSM cutter.

How to Find GSM of Fabric without GSM Cutter

To determine fabric GSM without GSM cutter we need the following apparatus.

Apparatus

  • Template
  • Electric Balance
  • Scissors
  • Ruler Scale

Sample

  • For testing, fabrics should be properly relaxed for accurate measurement.
  • For testing without GSM cutter, we cut 5 samples with the area of 100cm2 by cutting the fabric in 10cm length & 10cm width.
Measuring the Fabric for Calculating GSM without GSM Cutter

Atmosphere

The standard atmosphere for testing should be maintained, because moisture content may change the weighting of the sample and jeopardize the result. So the temperature should be near 20°c ± 2°c and humidity Should be near 65% ± 2%.

Working Procedure

  1. Firstly, for testing without GSM cutter we cut 5 samples using template in area of 100cm2 (10cm in length X10cm in width) from different places of that fabric.
  2. Then we take the weight of those 5 samples and multiply them with 100 and product data is kept
  3. Then with the data that we collected are calculated on average and we get the final GSM.

We have also built a fabric GSM calculator where you don’t have stick to a specific dimension like the procedure we have mentioned here. Just measure the length and width of the sample you have and you’re good to go.

How to Do GSM Calculation with GSM Cutter

To determine fabric GSM with GSM cutter we need the following apparatus.

Apparatus

  • Electric Balance
  • GSM cutter

Sample

  • For testing, fabrics should be properly relaxed for accurate measurement.
  • For testing with GSM cutter, we cut 5 samples with GSM cutter randomly from the fabric.

Atmosphere

The standard atmosphere for testing should be maintained, because moisture content may change the weighting of the sample and jeopardize the result .so temperature should be near 20°c ± 2°c and humidity should be near 65% ± 2%.

Working Procedure

  1. Firstly, for testing with GSM cutter, we cut 5 samples using GSM cutter from different places of the fabric.
  2. Then we take the weight of those 5 samples and multiply them with 100 and product data is kept.
  3. Then with the data that we collected are calculated on average and we get the final GSM.

Sample Data Table

With GSM Cutter Without GSM Cutter
Sample no Weight(gm) GSM=Weight X 100 Average GSM sample no Weight(gm) GSM=Weight X 100 Average GSM
1 1.56 156 158 1 1.58 158 157
2 1.60 160 2 1.62 162
3 1.53 153 3 1.52 152
4 1.62 162 4 1.55 155
5 1.59 159 5 1.58 158

Calculation

Fabric GSM= Weight of the sample in grams X 100

Fabric GSM=1.56 X 100

Fabric GSM=156 gm

This is how other calculations are done too.

Remarks

These methods are widely used in testing laboratories and industries. Relaxation and testing atmosphere is a must parameter to be maintained or else testing results will not be accurate. The instruments used are sure to be calibrated properly.

Frequently Asked Questions

You probably still have some queries. Check the following Q&A section to find your answers.

Why the result of GSM cutter is multiplied with 100?

GSM cutters pod is circular and we get circular sample. The sample we get is in cm form. The GSM cutter pod dia is 11.28cm

So we know, Area = Πr² = Π(D/2)²

=3.14 x (11.8/2)2

=100 Square cm

Now, 1 meter = 100cm

And, 1 square meter = 100 cm x 100 cm

To convert the centimeter value to meter value it is multiplied with 100.

Final Words

Hopefully, after reading this article, you’ve got the answers to how to find GSM of fabric without fabric cutter. And of course, if you already own the best fabric cutting machine, the process gets way easier.

Md.Asad Ullah Meem

Asad here. I’m an Instructor in the Department of Textile Engineering at Shyamoli Ideal Engineering College. I also have a Diploma and a Bachelor’s Degree in Textile Engineering, which I like to brag about whenever possible!

In my spare time, I love playing baseball – it’s just about the only sport that can rival my love for fashion & textiles.

My Social Profiles
LinkedIn | Facebook | Instagram

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