ASTM D2252-05(2009)

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D2252–96 (Reapproved 2005) Designation: D 2252 – 05 (Reapproved 2009)
Standard Specification for
Fineness of Types of Alpaca
This standard is issued under the fixed designation D 2252; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification is applicable in the classification of alpaca into types according to fineness.
1.2The values are stated in SI and inch-pound units.The inch-pound units in parentheses are to be regarded as the standard.The
values in each system are not exact equivalents, therefore, each system shall be used independently of the other. Combining values
from the two systems may result in nonconformance with the specification.
1.2 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.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
D 123 Terminology Relating to Textiles
D 2130 Test Method for Diameter ofWool and OtherAnimal Fibers by MicroprojectionTest Method for Diameter ofWool and
Other Animal Fibers by Microprojection
D 4845 Terminology Relating to Wool
3. Terminology
3.1Definitions:
3.1.1alpaca, n—the fleece and fiber produced by the alpaca, an animal of the genus Llama (Lama glama pacus).
3.1.1.1Discussion—There are two varieties of the alpaca animal, the Huacaya and Suri. The Suri produces straighter, finer, and
longer fibers, but most alpaca production is of the Huacaya variety. Alpaca is normally classified according to type, representing
particular combinations of characteristics appropriate to a specific use, or descriptive of geographic origin, breed or species of
animal, or preparation for market (see Appendix X1).
3.1.2average fiber diameter, n— in wool and other animal fibers, the average width of a group of fibers when measured on a
projected image.
3.1.3fineness, n—of fibers, a relative measure of size, diameter, linear density, or mass per unit length expressed in a variety of
units.
3.1.3.1Discussion—The fineness of alpaca and other animal fibers is expressed as the average fiber width or average fiber
diameter in micrometres (µm).
3.1.4For definitions of other textile terms used in this specification, refer to Terminology D123
3.1 For definitions of textile terms used in this specification: alpaca, average fiber diameter, fineness, refer to Terminology
D 4845.
3.2 For definitions of other textile terms used in this specification, refer to Terminology D 123.
4. Significance and Use
4.1 This specification for fineness is intended as a guide for production, preparation, and marketing (Note 1) by comparing the
average fiber diameter of a measured specimen with the fineness specifications for the various types listed inTable 1.The standard
deviation which expresses measured variability of a specimen may be compared with the average shown in Table X2.1.
This specification is under the jurisdiction of ASTM Committee D13 on Textiles and is the direct responsibility of Subcommittee D13.13 on Wool and Wool Felt.
Current edition approved Jan.July 1, 2005.2009. Published March 2005.August 2009. Originally approved in 1964. Last previous edition approved in 19962005 as
D2252–96.D 2252 – 05.
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