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Understanding About Count & Count Measurement System
Mustaque Ahammed Mamun
Department of Textile Engineering
Dhaka University of Engineering & Technology (DUET)
Cell: +8801723300703
Email: mamuntex09@gmail.com
Mustaque Ahammed Mamun
Department of Textile Engineering
Dhaka University of Engineering & Technology (DUET)
Cell: +8801723300703
Email: mamuntex09@gmail.com
Linear Density or Count :
Count is a numerical expression that indicates the coarseness or fineness of a yarn.
According to Textile Institute, “ Count is a number indicating the mass per unit length or the length per mass unit of a yarn”.
Types of Yarn Counting System
Direct system : Count is measured as the weight of yarn per unit length
If Count increase then Dia increase.
Count =
Indirect system : Count is measured as the length of yarn per unit weight.
If increase Count then decrease Dia
Count =
For Direct system Used formula,
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- N= count
- L= sample length
- l= unit length
- W= wt. of yarn
- ω= wt. unit
Types of yarn count :
Assuming an apparent specific volume for cotton yarn is 1.1-
Specific volume of yarn is 1.1 cc/gm
The mass of 1.1 cc yarn = 1 gm
If the yarn count is N tex then, we get
The length of N gm yarn is 1000m
The length of 1 gm yarn is 1000/N m=100000/N m
So that, length of 1.1 cc yarn is 100000/N m
We know that,
Cross sectional area × Length = Volume
If yarn Diameter is d then,
Converting cm to inches and Tex to English count
Measurement of Yarn Counting System :
- Normal count
- Conditional count
- Average count
- Resultant count
Assuming an apparent specific volume for cotton yarn is 1.1-
Specific volume of yarn is 1.1 cc/gm
The mass of 1.1 cc yarn = 1 gm
If the yarn count is N tex then, we get
The length of N gm yarn is 1000m
The length of 1 gm yarn is 1000/N m=100000/N m
So that, length of 1.1 cc yarn is 100000/N m
We know that,
Cross sectional area × Length = Volume
If yarn Diameter is d then,
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- Wrap reel and balance method
- Beasley’s yarn balance
- Knowles balance
- Quadrant balance method
- Sliver, roving count by measuring drum
- Count data system
- Auto sorter by Uster
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