ASTM D2118-96(2005)

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Designation:D2118–96 (Reapproved 2005)
Standard Practice for
Assigning a Standard Commercial Moisture Content for
Wool and its’ Products
This standard is issued under the fixed designation D 2118; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope yarn, fabric, so forth, in the “as-is” condition; that is, contain-
ing whatever moisture, oil, grease, or other extraneous matter
1.1 Thispracticerecommendsthatasinglevaluebeadopted
that may be present.
for the commercial moisture content of wool in any of the
3.1.2 wool, n—the fibrous covering of the sheep, Ovis
following forms:
species.
1.1.1 Scoured,
3.2 Definitions of Terms Specific to This Standard:
1.1.2 Carbonized and neutralized,
3.2.1 carbonized and neutralized wool—a term descriptive
1.1.3 Noils, uncarbonized,
of scoured wool processed to destroy cellulosic impurities by
1.1.4 Top, oil or dry combed,
treating with a mineral acid or an acid salt, drying and baking,
1.1.5 Yarn, worsted,
crushing, and dusting out the embrittled cellulosic matter
1.1.6 Yarn, woolen,
followed by neutralization of the acidified wool.
1.1.7 Yarn, hand knitting, or
3.2.2 commercial moisture content—for the purposes of this
1.1.8 Fabric.
practice, the moisture calculated as a percentage of the weight
1.2 Limitations—Grease wool, pulled wool, and wool with
of the wool, top, noils, yarn, fabric, etc., in the “as-is”
pH below 5.0 are excluded from this practice.
condition; that is, containing whatever moisture, oil, grease, or
1.3 This standard does not purport to address the safety
other extraneous matter that may be present.
concerns, if any, associated with its use. It is the responsibility
3.2.2.1 Discussion—The term “moisture regain” as defined
of the user of this standard to establish appropriate safety and
in Terminology D 123, leads to certain difficulties in defining
health practices and determine the applicability of regulatory
the clean wool basis for calculation, which do not occur when
limitations prior to use.
the term “moisture content” is used. Moisture content can be
2. Referenced Documents
applied directly to the product in the as-is condition while
moisture regain cannot.
2.1 ASTM Standards:
3.3 For the definition of wool and other textile terms used in
D 123 Terminology Relating to Textiles
this practice, refer to Terminology D 123.
D 584 Test Method for Wool Content of Raw Wool—
Laboratory Scale
4. Significance and Use
D 1909 Table of Commercial Moisture Regains for Textile
4.1 The purpose of this practice is to bring about uniformity
Fibers
of commercial moisture standards in all ASTM specifications
D 2720 Practice for Calculation of Commercial Weight and
relating to wool and its products.
Yield of Scoured Wool, Top, and Noil for Various Com-
4.2 This practice provides a recommended single value for
mercial Compositions
a standardized commercial moisture content for wool and its
3. Terminology
products.Thisavoidsdifficultiesencounteredincalculatingthe
amount of moisture-free fiber present in a given mass of wool
3.1 Definitions:
in any one of the forms listed in 1.1.1 to 1.1.8 due to trade
3.1.1 commercial moisture content
...