Yarn Count Overview - Connecting the Dots

Yarn Count And Classification:

Yarn Count: The yarn count is a numerical expression which defines its fineness or coarseness. It also expresses whether 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:

a) Indirect system- English, Metric, Worsted.

b) Direct system- Tex, Denier, Lbs/Spindle.

Indirect count: The count of yarn expresses the number of length units in one weight unit. Thus higher the count, finer the yarn.

The system is generally used for cotton, worsted, linen (wet spun) etc

w x L

Indirect count: N= ………………

W X 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.

Direct count: The count of yarn expresses the no. of weight units in one length unit. Thus higher the count, coarser the yarn. The system is generally used for synthetic fibre, 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.

In Details:

English system: It is defined as the number of hanks 840 yds per pound is called yarn count.

Length (yds) 1 pound

English cotton count, N =……………… X …………………

840 yds Weight (Pound)

Metric system: It is defined as the number of hank (1000m) per kg.

Length (m) 1 kg

Metric count =………………… X …………………….

1000m Weight (kg)

Worsted system: It is defined as the number of hanks (540yds) per pound.

Length (yds) 1 Pound

Worsted count =…………………… X …………………

560 (yds) Weight (Pound)

Tex system or, Lea count: It is defined as the weight in grams of 1000m is called tex count.

Weight (gm) 1000m

Tex count =……………… X ……………

1 gm Length (m)

Denier: The number or, count in the denier system is the weight in grams of 9000m.

Weight (gm) 9000m

Denier count =……………… X ………….

1 gm Length

Pounds per spindle (Jute system): Count in the pound per spindle system is the weight in pounds of 14400 yards of yarn.

Weight (Pound) 14400 (yds)

Pound per spindle =………………. X …………….....

1 Pound Length (yds)

Courtesy

Engineer Jannatul Tabassum

BUFT