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Yarn Count in Direct and Indirect System

Yarn Count in Direct and Indirect System
Mustaque Ahammed
Quality Assurance Officer,
Lamisa Spinning Ltd. Tongi, Gazipur
Cell: +8801723300703
Email: mamuntex09@gmail.com



Yarn Count:
We can define yarn count as the coarseness or fineness of yarn. It is just a numerical expression. There are main two types of yarn count measuring system. One is direct count and another is indirect count system.

We can measure the yarn count from the following formula:

                          590.5 x 16.1
Yarn Count = ……………………..
                      S.L. x Grey G.S.M. 


Standard yarn count measuring table: 
Indirect System:
In this system the yarn count express the number of length in one weight unit. That means Weight Unit is fixed & Length Unit is variable here.

By the following formula yarn count is expressed in indirect system:

                                 w x L
Indirect count: Ne = …………
                                 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. 


Following table will be helpful for you:


System
Unit weight
Unit length
Uses
English (Ne)
1 lb
840 yds
Cotton yarn
Metric (Nm)
1 kg
1 km
Cotton yarn
Worsted
1 lb
560 yds
Worsted yarn
Woolen
1 lb
256 yds
Woolen yarn
Direct System:
The weight of a fixed length of yarn is determined. The weight per unit length is the yarn count. The common features of aII 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:

                                W X l
Direct count: Nm = …………
                                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.


Following table will be helpful for you:


System
Unit weight
Unit length
Uses
Tex
Grams
1,000m
Polyester
Denier
Grams
9,000m
Lycra
D-Tex
Grams
10,000m
Lycra
Pounds/Spyndle
Pounds
14400yds
Jute

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4 comments:

  1. Very effective article for textile engineers. Thanks for sharing. hope you will continue this type of article more and more....

    ReplyDelete
  2. Your article are very impotent for beginners. Wish such article form you again.

    ReplyDelete
  3. Very helpfull thanks for sharing
    Jazak Allah

    ReplyDelete
  4. Very helpfull thanks for sharing
    Jazak Allah

    ReplyDelete