ASTM D2252-05

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D 2252 – 05
Standard Specification for
1
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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.2 For definitions of other textile terms used in this
specification, refer to Terminology D 123.
1.1 This specification is applicable in the classification of
alpaca into types according to fineness.
4. Significance and Use
1.2 The values are stated in SI and inch-pound units. The
4.1 This specification for fineness is intended as a guide for
inch-pound units in parentheses are to be regarded as the
production, preparation, and marketing (Note 1) by comparing
standard. The values in each system are not exact equivalents,
the average fiber diameter of a measured specimen with the
therefore,eachsystemshallbeusedindependentlyoftheother.
fineness specifications for the various types listed in Table 1.
Combining values from the two systems may result in noncon-
The standard deviation which expresses measured variability
formance with the specification.
of a specimen may be compared with the average shown in
1.3 This standard does not purport to address all of the
Table X2.1.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
NOTE 1—Test Method D 2130 does not include any values for the
priate safety and health practices and determine the applica- precision to be expected in the testing of alpaca fibers. In an interlabora-
tory test in which six laboratories each made one test on each of six type
bility of regulatory limitations prior to use.
samples, HTB-CB, HAXB-CB, HAAB-CB, HAB-CB, HLPB-CL, and
HSKB-CL, the coefficient of variation of the average fiber diameters
2. Referenced Documents
between laboratories, including test variation, was 3.2, 4.7, 3.8, 4.5, 2.2,
2
2.1 ASTM Standards:
and 0.93 % for the respective alpaca types.
D 123 Terminology Relating to Textiles
D 2130 Test Method for Diameter of Wool and Other
5. Specification
Animal Fibers by Microprojection
5.1 The fineness of various types of alpaca shall conform to
D 4845 Terminology for Wool
the average fiber diameter limits listed in Table 1.
3. Terminology
6. Sampling
3.1 For definitions of textile terms used in this specification:
6.1 Sample the material as directed in Test Method D 2130.
alpaca, average fiber diameter, fineness, refer to Terminology
D 4845. 7. Test Method
7.1 Test the material as directed in Test Method D 2130.
1
This specification is under the jurisdiction of ASTM Committee D13 on Measure at least the minimum number of fibers specified to
Textiles and is the direct responsibility of Subcommittee D13.13 on Wool and Wool
attain confidence limits of the mean of 60.5 µm at a probabil-
Felt.
ity level of at least 95 % (see TableA1.4 inAnnexA1. to Test
Current edition approved March 1, 2005. Published April 2005. Originally
Method D 2130).
approved in 1964 . Last previous edition approved in 2005 as D 2252 – 96
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