SWICOFIL - Yarn and fiber expert.

YARN NUMBERING SYSTEMS

TEX-SYSTEM

Swicofil indicates the counts of their yarns by means of the Tex-System.

TEX UNITS

 
 Term
 Definition

 Basic Tex Unit [tex]

Mass of yarn in grams per 1'000 meters length.

 Decimal fraction

Mass of yarn in grams per 10'000 meters length.

 Decitex [dtex]

1 g / 10'000m = 1/10tex

Decitex is the count grading for filament and spinning yarns recognized by all international bodies in the man-made fibers  industry.

 Decimal multiple

 Mass in kilograms per 1'000 meters length.

 Kilotex [ktex]

1 kg / 1'000m = 1000 tex

Kilotex is used to state the counts of spinning tow and similar semi-finished and finished products.

OTHER NUMBERING SYSTEMS

 
 Term
Definition
 Count Denier [den]
Mass of yarn in grams for length of 9'000 meters. 
 Metric yarns number [Nm] 
Length in meters per 1 gram of mass.
 English cotton yarn number [Ne], [ECC] 
Number of 840 yards strands per 1 English pound of mass.
 Wool runs
Number of 1600 yards strands per 1 English pound of mass. 
 Wool, worsted [NeK]
Number of 560 yards strands per 1 English pound of mass.
 Wool, woolen measure [NeS]
Number of 256 yards strands per 1 English pound of mass.
 Linen Count [NeL], [Lea]
Number of 300 yards strands per 1 English pound of mass.
 Spun silk
Number of 840 yards strands per 1 English pound of mass.

Worsted wool has nothing to do with worsted weight yarn. Worsted wool is wool which is carded and combed so that all the fibers are parallel. Woolen measure of Yorkshire wool is carded but not combed, so it is a little rougher. Worsted wool is usually very fine and used for suits and fine fabric. Hand knitting yarn is usually woolen type yarn. When quoting wool, some manufacturers specify "worsted" or "woolen" - however most do not indicate it.
 

CONVERSION FORMULAS FOR THE VARIOUS NUMBERING SYSTEMS

​​​​
convert into →
 
known↓
 tex

 
 dtex

 
 den

 
 Nm

 
 Ne

 
 tex - 10 x tex 9 x tex 1'000 / tex 591 / tex
 dtex dtex / 10 - 0.9 x dtex 10'000 / dtex 5'910 / dtex
 den den / 9 den / 0.9 - 9'000 / den 5314 / den
 Nm 1'000 / Nm 10'000 / Nm 9'000 / Nm - 0.59 x Nm
 Ne 591 / Ne 5910 / Ne 5314 / Ne 1.69 x Ne -


In case you do not want to convert the counts yourself, use our count converter service here!
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