### 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, Where,
• N= count
• L= sample length
• l= unit length
• W= wt. of yarn
• Ï‰= 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