Determination of Fabric GSM by GSM Cutter.

Experiment No.: 02

Experiment Name: Determination of Fabric GSM by GSM Cutter.

Introduction: 

The GSM of fabric is one kind of specification of fabric which is very important for textile engineer for understanding and production of fabric. 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.

Objectives:

1. To determine the GSM of the given sample of fabric.
2. To compare the GSM of them.

Apparatus:

1. Template
2. Quadrant Balance
3. Scissor
4. GSM Cutter
5. Electric Balance

Figure:-

Machine Description: 

GSM cutter machine are highly precise fabric cutting equipments and highly demanded as well as appreciated in fabric industries. One time investment life long hustle free running comes with complete metal parts, no workable knife or rubber pads involved. GSM round cutter offered by us come filleted with precision finished and superior grade aluminium and brass blades as well as other associated metal parts that ensure uniform cutting of woven, non woven as well as knitted fabrics. The specialised cutters finding usage in the process of determining the GSM of the product and besides fabric cutting carpet, paper products and board products. Further as these cutters are freely rotatable, locking device which is engaged while the cutter is not in use.

Working Principle:

1. For measuring with quadrant balance at first we should cut the fabric sample according to the template area. By this way cut 5 samples.
2. Now weight these samples in pounds by quadrant balance according to100 yards scale.
3. By this way we get the weight in pound per 100 square yard fabric.
4. For measuring GSM, we should cut the fabric sample by GSM cutter. By this way we cut 5 sample.
5. Now weight these samples by electric balance in grams.
6. By this way we get the weight in gram per one square meter fabric.
7. Now find out the average of these found weights.

Calculation:

For sample 01, GSM  = Sample weight in gm x 100
                                   = 2.55 x 100

                                   = 255

For sample 02, GSM  = Sample weight in gm x 100

                                   = 2.25 x 100

                                   = 225

For sample 03, GSM  = Sample weight in gm x 100

                                   = 2.36 x 100

                                   = 236

For sample 04, GSM  = Sample weight in gm x 100

                                   = 2.45 x 100

                                   = 245

For sample 05, GSM  = Sample weight in gm x 100

                                   = 2.50 x 100

                                   = 250

So, Average GSM      = (255+225+236+245+250)/5  

                                   = 242.2

Table:

Observation No.:	Sample Weight in gm	GSM	Average GSM
01	2.55	255	242.2
02	2.25	225
03	2.36	236
04	2.45	245
05	2.50	250

Result:

 The weight of the fabric is 242.2 GSM.

Conclusion: 

The instrument is very popular in the textile industries to measure GSM of fabric. It can use easily to determine accurate GSM for non woven and woven fabric.