Count Conversion Calculation of Yarn from Direct & Indirect System to Universal Tex System
Mayedul Islam
Merchandiser at Fashion Xpress Buying House.
Badda, Dhaka, Bangladesh.
Email: mayedul.islam66@gmail.com
Merchandiser at Fashion Xpress Buying House.
Badda, Dhaka, Bangladesh.
Email: mayedul.islam66@gmail.com
In case of “conversion from direct to universal tex system”:
In direct system the count is used for the measurement of weight per unit length of yarn where length is considered as constant.
Direct
system

Universal
Tex system

Silk,
Denier (Metric)

0.1111

Silk
Dram

1.938

Jute,
spindle

34.45

flax

34.45

Woolen,
Aberdeen

34.45

American,
Grain

3.543

Required count = Known count × conversion factor.
Example 01:
What is the equivalent count of 150 denier (metric) in tex system?
Solution:
From the above table, we find that the conversion factor is 0.111
Therefore,
Required count = 150 × 0.111
= 16.665 tex.
So, 150 denier (metric) in tex system is 16.665 tex.
Example 02:
What is the equivalent count of 40 jute in tex system?
Solution:
From the above table, we find that the conversion factor is 34.45
Therefore,
Required count = 40 × 34.45
= 1378 tex.
So, the equivalent count of 40 jute in tex system is 1378 tex.
In case of “conversion from indirect to universal tex system”:
In indirect system of measuring count t is used for the measurement of length per unit weight of yarn where weight is considered to be constant.
Indirect
system

Universal
tex system

Cotton
(English)

590.5

Spun
silk and spun rayon staples

590.5

Metric

1000

Linen
(wet spun)

1653

worsted

885.8

Woolen
Yorkshire skein

1938

Alloa

1033

Hawick

2687

Required count,
Conversion factor
= ………………………………
Known count
Example 01:
Convert 50s cotton into tex system.
Solution:
From the above table, we find that the conversion factor is 590.5
Therefore,
Required count,
Conversion factor
= ………………………………
Known count
590.5
= …………….
50
= 11.8 tex
So, 50s cotton into tex system is 11.8 tex.
Example 02:
Convert 45s linen into tex system.
Solution:
From the above table, we find that the conversion factor is 1653
Therefore,
Required count,
Conversion factor
= ………………………………
Known count
1653
= ……………
45
= 36.73 tex.
So, 45s linen into tex system is 36.73 tex.