Understanding About Count and Count Measurement System

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

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,

For Indirect system Used formula,

  • N= count
  • L= sample length
  • l= unit length
  • W= wt. of yarn
  • ω= wt. unit
Types of yarn count :
  • Normal count
  • Conditional count
  • Average count
  • Resultant count
Relation between yarn diameter and 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 :
  1. Wrap reel and balance method
  2. Beasley's yarn balance
  3. Knowles balance
  4. Quadrant balance method
  5. Sliver, roving count by measuring drum
  6. Count data system
  7. Auto sorter by Uster 


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