Contents Index

## Definition of Yarn Count

Count is a numerical value, which express the coarseness or fineness (diameter) of the yarn and also indicate the relationship between length and weight (the mass per unit length or the length per unit mass) of the yarn.

Therefore, the concept of yarn count has been introduced which specifies a certain ratio of length to weight.

## Types of Yarn Count

One distinguishes between two system:

- Direct Count System
- Indirect Count System

## Direct Count System

The weight of a fixed length of yarn is determined. The weight per unit length is the yarn count.

The common features of all direct count systems are the length of yarn is fixed and the weight of yarn varies according to its fineness.

The following formula is used to calculate the yarn count:

N = W*I/L

Where, N is the yarn count or numbering system. W is the weight of the sample at the official regain in the unit of the system. L is the length of the sample and I is the unit of length of the sample.

## Direct Yarn Count Numbering Sign

- Tex System = Tt
- Denier, D = Td
- DeciTex = dtex
- Millitex = mtex
- Kiltex = ktex

## Indirect Count System

The length of a fixed weight of yarn is measured. The length per unit weight is the yarn count.

The common features of all indirect count systems are the weight of yarn is fixed and the length of yarn varies according to its fineness.

The following formula is used to calculate the yarn count:

N = L*w ⁄ W*I

Where, N is the yarn count or numbering system. W is the weight of the sample at the official regain in the unit of the system. L is the length of the sample. w (small) is the unit of weight of the sample and the I is the unit of the length of the sample.

## Indirect Yarn Count Numbering Sign

- English Cotton Count = Ne
- Metric Count = Nm
- Woolen Count = YSW
- Worsted Count = NeK
- Linen Count = NeL