Different Formula for Yarn Count Calculation

Yarn Count:
A count is a number that indicates the mass per unit length or the length per unit mass of yarn ……… According to Textile Institute. In the article, we will discuss the different formula for yarn count calculation.

Yarn Count Calculation

Different Formula for Yarn Count Calculation

Types of Yarn Count :
Yarn counts are two types.

  1. Indirect system
  2. Direct system

1. Indirect Count System:
The count of yarn expresses the no. of length per unit in one weight unit. Higher the count, the finer the yarn. This system is generally used for cotton, worsted, linen, etc.

Indirect count:

……….L × w
N = ……………
……….W × l

Where,

W = The weight of the sample
w = The unit weight of the system
L = The length of the sample
l = The unit length of the sample

2. Direct Count System:
The count of yarn expresses the no. of weight units in one length unit. Higher the count, the coarser the yarn. This system is generally used for synthetic fiber, jute, silk, etc.

Direct yarn count:

…………W × l
N = ………………
…………w × L

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

Determination of yarn count by Beesley Balance:

When a cotton yarn is supplied in short length or removed from the fabric, the count of yarn could be measured by a special type of balance is called Beesley’s balance.

Procedure: At first collect a sample. In this sample, the warp direction yarn color is blue and the weft direction yarn color is white. First of all, 12 yarn withdrawn in warp direction from that fabric. Again 12 yarn withdrawn in the weft direction. Marking all withdrawn yarn by the template and cut them. Now placed that yarn in the hook until the pointer comes in level with the datum line. At that stage, the threads are taken out and counted which givers directly the count of yarn taken for testing.

Author of this Article:
S. M. Hossen Uzzal
 B.Sc. in Textile Technology
 Noakhali Textile Engineering College
 Email: uhossen@gmail.com

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