COUNT SYSTEM

YARN COUNT

Yarn count is the numerical expression which indicates  the fineness or coarseness of yarn. It is way to expresses the yarn is thick or thin. According to Textile Institute, Count a number indicating the mass per unit length or the length per unit mass of yarn.

The linear density is expressed as mass per unit length .

           

Yarn count can be described into two systems:

1. DIRECT SYSTEM                                         
2. INDIRECT SYSTEM

DIRECT SYSTEM : The yarn count is the mass of unit length of yarn. Higher the count coarser the yarn. This method is used for man made fiber.

By the following formula count is measured.                  

N = (W/l) / (L/w)
Where,
N = The Yarn count
W = The weight of sample
L = The length of sample
l = The unit of length
w = The unit of weight

The following direct  system are used: 

• Denier
• Tex

Denier System : 

Tex: The yarn number or count in the Tex system is the weight in grams of 1000m or 1 km of
yarn.
Denier = weight in grams of 9000 meters length of yarn.

Tex System : 

Tex: The yarn number or count in the Tex system is the weight in grams of 1000m or 1 km of
yarn.

Tex = weight in grams of 1000 meters length of yarn.

INDIRECT SYSTEM : In this system the weight unit is fixed and the length of the yarn varies as per its thickness .

• English count
• Metric count
• Worsted 

 English Count (Ne) : 

The number of hanks of 840 yards in one pound weight is known as the count of the yarn . It is also known as cotton count and is denoted by Ne . 

                           No. of Hanks ( Hank of 840 yards ) 

Count (Ne) = --------------------------------------------------------- 

                                           1 lb weight 

Metric Count : 

The number of hanks of 1000 meters length in one kilogram weight is called the count of the yarn in this system . It is denoted by Nm. 

                           No. of Hanks ( Hank of 1000 meters ) 

Count (Nm) = --------------------------------------------------------- 

                                        1 kg weight 

 Worsted Count : It is defined as the number of hanks (560 yards) per pounds.

Count  conversion

Count Determind	Ne	Nm	Tex	Decitex	Denier
Ne	1.0	Nm / 1.69	590.5/Tex	5905/d tex	5315/denier
Nm	1.69 x Ne	1.0	1,000/Tex	10,000/d tex	9000/denier
Tex	590.5/Ne	1,000 / Nm	1.0	Decitex0.1	Denier / 9
Decitex	5905/Ne	10,000/Nm	Tex x 10	1.0	Denier / 0.9
Denier	5315/Ne	9,000/Nm	Tex x 9	decitex0.9	1.0