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Historical Version(s) - view previous versions of standard

**Significance and Use**

**1. Scope**

1.1 These tables include (1) a series of conversion factors required to convert the number of a yarn measured in a specific system to the equivalent number measured in various other systems (see Table 1), and (2) specific equivalent numbers for yarns measured in various systems (see Table 2).

System for Which Yarn Number is | System for Which Yarn Number is Known | |||||||||

Tex | Denier | American | Cotton | Worsted | Woolen Run | Metric | Linen Lea | Yd/lb | ||

Tex | tex = | ... | 0.590 541 | |||||||

Denier (g/9000 m) | den = | 9 × tex | ... | 5.314 87 | ||||||

American Grain Count (grains/120 yd) | gr = | ... | ||||||||

Cotton count (840 yd lengths/lb) | cc = | ... | 0.590 541 | |||||||

Worsted count (560 yd lengths/lb) | wc = | 1.5 × cc | ... | 0.885 812 | ||||||

Woolen run (1600 yd lengths/lb) | wr = | 0.525 × cc | 0.35 × wc | ... | 0.310 034 | 0.187 5 | ||||

Metric count (1000 m/kg) | mc = | ... | ||||||||

Linen lea (300 yd lengths/lb) | lea = | 2.8 × cc | 1.866 67 | 0.187 5 | 1.653 52 | ... | ||||

Yards per pound (yd/lb) | y = | 840 × cc | 560 × wc | 1600 × wr | 496.055 | 300 × lea | ... |

Examples of Table 1 use:

1) The English worsted count equivalent to a cotton count of 10 is 1.5 times 10, or 15 English worsted count.

2) The cotton count equivalent to 30 tex is 590.54 divided by 30, or 19.7 cotton count.

1.2 The content is basically consistent with recommendations of the International Organization for Standardization (ISO) Standard 2947.

1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

**2. Referenced Documents** *(purchase separately)* The documents listed below are referenced within the subject standard but are not provided as part of the standard.

**ASTM Standards**

D123 Terminology Relating to Textiles

D4849 Terminology Related to Yarns and Fibers

SI10 Standard for Use of the International System of Units (SI): The Modern Metric System Excerpts from SI 10, Standard for Use of the International System of Units (SI): The Modern Metric Syste, can be found in the Annual Book of ASTM Standards, Vols 07.01 and 07.02. The standard is available as a separate publication and appears in its entirety in Vol 14.02.

**ISO Standard**

**NIST Standard**

**ICS Code**

ICS Number Code 59.080.20 (Yarns)

**UNSPSC Code**

UNSPSC Code 11151700(Yarns)

**DOI:** 10.1520/D2260

ASTM International is a member of CrossRef.