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Thread Numbering

Bulletin 5

Contents Thred Numbering 655x368

Common Yarn Numbering Systems
Count Conversions
Ticket Numbering
Communicating Thread Size with Ticket Numbers

Contact us about Thread Sizes



Introduction

Thread selection for any specific application is based on many parameters, thread size is the primary consideration in achieving the functional and aesthetics requirements of the finished product.

Thread sizes are communicated through various numbers and numbering systems which are derived by relating its unit length and weight. It is important to know various numbering systems and their relationships in understanding thread size specifications; this Bulletin Post will serve as your quick reference guide.

Fixed Weight and Fixed Length Numbering Systems

All numbering systems used to indicate thread size are either 'fixed weight' or 'fixed length' systems.

Fixed Weight SystemsFixed Length Systems
In this system, unit weight is taken as fixed and its length is measured.In this system, unit length is taken as fixed and its weight is measured.
Systems under fixed weight:
  • English Count (Ne) = Number of hanks of 840 yards/lb
  • Metric Count (Nm) = Number of hanks of 1000 metres/kg
Systems under fixed length:
  • Denier = Weight in grams of 9,000 metres
  • Tex = Weight in grams of 1,000 metres
  • Decitex = Weight in grams of 10,000 metres
Example:
  • Ne 1 – In one pound of yarn weight, there are 840 yards of yarn length
  • Ne 5 – In one pound of yarn weight, there are 4200 (840x5) yards of yarn length
Example:
  • Tex 40 – A length of 1,000 metres gives 40 Grams of weight
  • Tex 100 – A length of 1,000 metres gives 100 Grams of weight
In fixed weight systems, the yarn becomes finer as the count number increasesIn fixed length systems, the yarn becomes coarser / heavier as the count number increases

Generally, Metric count is used to describe synthetic, spun and corespun thread while English count is used to specify cotton thread. Filament threads are normally expressed with Decitex or Denier.

Resultant Thread Size

When more than one ply of yarn is twisted into a thread, finding the resultant size of the thread by considering all the plies becomes necessary.
In fixed weight systems: Resultant size = Individual yarn count / Number of plies
In fixed length systems: Resultant size = Individual yarn count x Number of plies
A particular resultant size can be made with any number of plies.

Count Conversions

Using the table below will enable you to perform a simple conversion from one system to another. 

SystemTexdTexDenNmNec
Tex-dTex10Den91000Nm590.54Nec
dTexTex × 10-Den0.910000Nm5905.4Nec
DenTex × 9dTex × 0.9-9000Nm5314.9Nec
Nm1000Tex10000dTex9000Den-Nec × 1.6934
Nec590.54Tex5905.4dTex5314.9DenNm × 0.5905-

Ticket Numbering

Ticket numbering is a commercial numbering system. Ticket numbers are merely the manufacturer’s reference numbers for the size of a given thread.

The Metric Count, Cotton Count and Denier Systems use ticket numbering system to give an easy approximation of the specific size of the finished thread.

A ticket number in one type of thread will not be the same as in another. For example, Ticket 40 Cotton is not the same as Ticket 40 Corespun.

Ticket numbers resemble the fixed weight system. 

They can simply denote:

  • Higher the ticket number, finer the thread
  • Lower the ticket number, thicker the thread

Converting sizes for synthetic products.

Arriving at a Ticket Number 

TexdTex × Ply
(When 2-Ply)
dTex × Ply
(When 3-Ply)
Total Decitex
(dTex)
Ticket No.Calculation for
Ticket No.
40200 × 2133 × 3dTex 40075(100040 × 3)
60300 × 2200 × 3dTex 60050(100060 × 3)
80400 × 2267 × 3dTex 80038(100080 × 3)
100500 × 2333 × 3dTex 100030(1000100 × 3)

Note:

  • To convert any Tex Number to a Ticket Number value: divide 1,000 by the Tex number and multiply by 3.
  • To establish the Tex of a particular Ticket number, please contact your nearest Coats office.

Cotton threads are rarely used today, so ticket numbers for cotton threads are not discussed here.

Communicating Thread Size with Ticket Numbers

In the thread industry, different countries follow different ticket numbers. Knowing different ticket number conventions for a certain thread size and the corresponding Tex size will aid you in thread selection.