# Weaving calculation

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CHAPTER - 7

WEAVING CALCULATION & USEFUL FORMULAS:

7.1. Count:

• A number indicating the Mass per unit Length OR

• The length per unit mass of Yarn.

• Expression of the fineness of Yarn.

There are three Systems to Calculate Count -

1. Indirect System

2. Direct System

3. Universal System

1 Lea = 120 yd

7 Leas = 1 hank

1 Hank = 840 yds. or 768 meter

1. Indirect system

Total No. of hanks per one pound is the count of that yarn (Ne) i.e. if 10 hanks (10 x

840 yds. or 7680 meters) weighs one Pound or 0.454 Kg, then the Count of Yarn in indirect

system 10s or 10Ne.

This System widely used for staple fiber spun yarns like 100% Cotton, Viscose,

Polyester fibers and their blends.

Higher the yarn Count i.e Ne the yarn is finer

Length in hanks (840 yards)

Count =

Weight in Pounds

2. Direct System

Count = Weight in grams per 9000 meters of yarn

In this system the yarn numbering is called as Denier (D)

Higher the yarn number i.e Denier the yarn is coarser.

3. Universal System

Count = No of grams per 1000 meters or per km of yarn.

In this system count is called as Tex

Commonly used other numbering systems

I. Nf - French count: - It is the No of 1000 meters length in ½ kg of yarn

II. Nm - Metric system: - Count is the No of 1000 meters length per kg. of

yarn.

III. Worsted system: - Count is the No. of 560 yards in one lbs.

IV. Linen system: - It is the No. of leas of 300 yards per pound

V. Hemp, Jute, Flax: - Count is the No of 14,400 yards length per pound of

yarn

Conversion System

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