Yarn Count Numbering Organisation Too Conversions

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Yarn count:
Yarn count is the physical thickness, coarseness or fineness of yarn which can be measured too defined equally fine increasing inwards size to thick or form.

The size or thickness of the yarn relates to a unit of length as well as weight of the yarn and also influences the covering ability of the yarn. Yarn of finer thickness requires a greater issue of yarns to fill a square inch measured infinite of fabric. Yarns of coarse or greater thickness take less yarn to fill up the same square-inch measured infinite. High roofing power or good covering power translates to hateful, fewer yarns are required. Low or hapless roofing ability many yarn are required.

Yarn count or yarn thicknesses are measured by a straight in addition to indirect organisation of measurement. The direct arrangement is used to mensurate all filament yarns. The indirect or inverse proportion organisation is used to measure all spun yarns.

Types of yarn count:
Yarn count numbering organisation divided into two types. They are

  1. Direct system/Decitex organization/Dtex – Tex, denier, Ibs/spindle.
  2. Indirect system/yarn count system – English language, metric, worsted.

1. Direct yarn count system:
This organization measures filament yarn alone. The direct organization is a direct reading where by the weight of the fiber is the same as the yarn count. Weight is measured in grams; the grams equal the denier count. The basic unit used for mensuration is 9000meters or i gram.

As the number increment, the physical size of the yarn gets thicker. Fine or thin yarns will accept a lower count than coarse, thick yarns. This organization is more often than not used for synthetic fiber, jute, silk etc.


       westward x 50
northward = ————–


northward = The yarn issue or count
due west = The weight of the sample
L = The length of the sample
l = The unit of measurement of length of the organisation

In the denier organisation, the weight unit of measurement is the gram and the unit of measurement of length is 9000 meters. The denier of a yarn is the weight inward grams of 9000 meters.

If sample weight, west = one.67 gm, sample length, L = 100 meters in addition to unit length, fifty = 9000 meters

                                     westward 10 l
Therefore Denier, northward = ————–

    i.67 10 9000
= ————————-

= 150.iii denier

two. Indirect arrangement of yarn count:
This organisation measures spun yarn entirely. The yarn count issue is inversely proportioned to the weight of the yarn. As the issue increases, the physical size of the yarn gets finer as well as thinner. A fine, sheer yarn will take a higher count number than a coarse, thick yarn. Yarn count standards differ for each staple fiber classification. Yarn count standards represent the number of yards inward ane pound of a number i count of that specific yarn.

In an indirect organisation the yarn issue or count is the number of units of length per unit of measurement of weight. There are diverse units of length as well as weight in addition to numerous organization.


       w x L
north = ———–
       west ten fifty


westward = The weight of the sample
w = the unit of measurement weight of the arrangement
L = The length of the sample
fifty = The unit of measurement of length of the sample.

e.g. A length (120 yards) of cotton wool yarn weight 25 grain calculation its count inwards the cotton fiber system. In this example the “Unit of length” is the hank 840 yards in addition to the “Unit of weight is lbs. (1 lb =7000 grain)


L = 120 chiliad. 50 = 840 M.

W = ———– lbs.       w = 1 lb

(The small-scale “s” later on the count issue is a convention used for expressing count)

Note: The values 7000 in addition to 840 seem inward all such cotton yarn calculations together with may therefore live reduced to a constant fraction 100/12 one.e. 7000/840

                            Length in yards              100
one.e. Yarn count = ——————————- X ———–
                            Wt. inward grains                   12

Further it is ever tested, and then

                               120 10 100
Cotton count = ——————————
                          Wt. inward grains 10 12

= ————————
   Wt. in grains

Tex arrangement of yarn numbering (directly system):

This is a directly system of mensuration. It is used to measure out both filament too spun yarn of silk, regenerated cellulosic fiber and homo-made fibers. As the numbers increment, the physical size of the yarn gets thicker. The tex system using fixed weights, states the weight of 1000m of a given yarn.

The yarn issue or count inwards the Tex arrangement is the weight inwards grams of i kilometer of yarn.

The weight inwards milligrams per kilometers is “millitex”. It is used to express fineness of fibers.

The weight in kilograms per kilometer or what sum to the same things of grams per meter.

Units of Length in addition to Weight inward Counting Systems:

Conversion systems of count:
Conversion from 1 organisation to some other is achieved past conversion factors together with constants. Where a direct to a direct organization or an indirect to an indirect arrangement is connected, a multiplying conversion factor is used.

Direct organization:

Indirect organisation:

Unit of length
Unit of volume
Asbestos (American)
100 yds. (cut)
Asbestos (British)
fifty yds.
Cotton (British)
480 yds.(hank)
100 yds. Kilometer
Spun silk
840 Yds (hank)
560 yds (hank)

e.g. Denier x 0.111 = Tex direct to straight.

Cotton count x one.5 = Worsted count indirect to indirect

Where the conversion is from a directly to an indirect or vice poesy, a constant is used into which the known count is divided to pass on the equivalent count inwards the other organization.

e.g. the constant for cotton too denier is 5315 so 
32 cotton count = ———-

= 166 denier

in addition to 100 denier = ————-

= 53.fifteen cotton fiber count

Conversion from one organisation to another directly to directly:

Indirect to indirect:

Known yarn count inward
Multiplying component to reach yarn count inwards
Cotton & spun silk
Linen (wet. Spun)
Woollen (York, skein)
Cotton as well as spun silk
Linen (wet. Spun)
Woollen (York, skein)

Direct to indirect & inward directly to straight:

Known yarn count inwards
Constant into which the known yarn count is divided in social club to obtain the equivalent yarn count in the other arrangement.
Linen (dry-spun), hemp, jute in addition to woollen
Cotton too spun silk
Linen (moisture. Spun)
Woollen (York, skein)

There is a human relationship betwixt count or yarn number to twist of yarn. In sec straight organisation:

TPI (Twist Per Inch) = Twist factor x √count

In a indirect organization, 
                                         Twist constituent
TPM (Twist per meter) = ———————
                                         √Tex count

Traditional organisation of conversion:

a. Tex = ————————-
              Cotton count

b. Tex = Denier ten 0.111

Measurement of yarn count:

  a. Wrap reel together with analytical residual
  b. Wrap reel too noesis residue
  c. Wrap reel together with quadrant rest

Yarn diameter too count relationship:

Yarn diameter (inward inches) = —————
                                           √28 count

Different yarn counting arrangement:

English language cotton wool count:
It is the number of hank of 840 yards inwards ane pound yarn e.g. in English language cotton fiber count organisation twoscore” or xl ne as it is expressed means 1 pound yarn contains xl numbers of hanks, each of 840 yards length.

Weight inward gms per K meter or i km of yarn e.g. if yard meter of a yarn weight 25 gm and so the yarn count is 25 denier.

Weight inwards gms per 9000 meter of yarn, e.g. if 9000 meter of a yarn weight 225 gm. them the yarn count is 225 denier.

Metric arrangement:
It is the number of hanks of M meter in 1 kg. of yarn. eg. If inwards i kg, of yarn there are twoscore hanks each of one thousand meter length, and so the count of the yarn is forty Nm.

Jute count organization:
Weight inward pound per xiv,000 yards (spindle) of yarn e.g. if fourteen,400 yards of a jute yarn weight five pound, and so the count is five pound/ spindle.

Worsted arrangement:

Number of hanks of 560 yards in i pound.

Conversion of yarn count from i system to another:
i. English cotton count to Tex & vice versa.

English cotton count x Tex = 590.five

one.e. If yarn count is known inward i of the systems, other tin can be plant past dividing 590.5 past that known count.


Convert 20 cotton wool into Tex?

We know,

xx ten Tex = 590.5

e.g. Tex = ———-

= 29.525

ii. English language cotton count to worsted count.

We know,

Worsted count = English cotton wool count 10 1.5

e.g. twenty cotton fiber yarn = xxx worsted

3. Metric count to tex and vice varsa.

We know,

Metric count 10 Tex =thousand

e.g. Metric count = ——————–


Tex = —————-
         Metric count

four. Worsted count to Tex & vice varsa

We know,

Worsted count x Tex = 855.8

e.g. Worsted count = —————


Tex = ———————–
          Worsted count

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