Yarn Count System and Determination by Different Methods

Definition of Yarn Count:

Yarn count is a numerical expression which defines its fineness or coarseness. It also expresses weather the yarn is thick or thin. A definition is given by the textile institute – “Count is a number which indicates the mass per unit length or the length per unit mass of yarn.”

Types of Yarn Count:

Basically, there are mainly two ways of yarn count;

1. Direct count system
2. Indirect count System

Direct count system:

In a direct yarn counting system, the yarn number or count is the weight of a unit length of yarn. This means the higher the yarn count number, the heavier or thicker the yarn. It is fixed length system. This system is used for express the count of man-made fiber, jute, silk etc.

……………………………. W x l
Direct Count, N = —————
……………………………. w x L

Where,

N = The yarn number or, count
W = The weight of the sample
w = The unit weight of the sample
L = The length of the sample
l = The unit length of the sample

Tex, Denier, Pounds per spindle is the unit which is expressed in direct system.

Indirect count system:

In an indirect yarn counting system, the yarn number or count is the number of “units of length” per “unit of weight” of yarn. This means the higher the yarn number, the finer or thinner the yarn. It is based on the fixed weight system. This system is used for express the count of natural fiber.

Different Methods of Yarn Count Determination:Beesley Balance

• Wrap Reel Balance
• Quadrant Balance
• Stubb Yarn Balance