Standard Test Method for Wool Content of Raw Wool-Commercial Scale

SIGNIFICANCE AND USE
This test method is considered satisfactory for use as a referee method for the determination of the wool base content and the clean wool fiber present in a lot of raw wool. If there are differences of practical significance between reported test results for two laboratories (or more), comparative test should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, use the samples for such a comparative test that are as homogenous as possible, drawn from the same lot of material as the samples that resulted in the disparate results during the initial testing and randomly assigned in equal numbers to each laboratory. The test results from the laboratories involved should be compared using a statistical test for unpaired data, probability level chosen prior to the testing series. If bias is found, either its cause must be found and corrected, or future results for that material be adjusted in consideration of the known bias.  
This test method is also used in studies aimed at deriving suitable formulas for estimating the allowances to be made for wool unavoidably lost or destroyed in such commercial operations as carding, combing, or carbonizing.
SCOPE
1.1 This test method covers the determination of the wool base content and the clean wool fiber present in a lot of raw wool by commercial-scale scouring of the lot followed by laboratory tests on samples of the scoured wool. Note 1The sampling of lots of raw wool in packages is covered in Practice D 1060, and the determination of the wool content of such samples is covered in Test Method D 584. The determination of vegetable matter and other alkali-insoluble impurities in scoured wool is covered in Test Method D 1113. For factors for the conversion of wool base content to its equivalent in terms of scoured wool, top, or noil of various commercially specified compositions, refer to Practice D 2720. Note 2
The values stated in U.S. Customary Units are to be regarded as the standard because of common commercial practice. The S.I. units in parentheses are provided for information only. Note 3
Because of trade practice the term "weight" is used in this test method instead of the technically correct term "mass".
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.

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Historical
Publication Date
28-Feb-2005
Technical Committee
Drafting Committee
Current Stage
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ASTM D1334-05 - Standard Test Method for Wool Content of Raw Wool-Commercial Scale
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
Designation:D1334–05
Standard Test Method for
1
Wool Content of Raw Wool—Commercial Scale
This standard is issued under the fixed designation D1334; 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 D2720 Practice for Calculation of Commercial Weight and
Yield of Scoured Wool, Top, and Noil for Various Com-
1.1 This test method covers the determination of the wool
mercial Compositions
base content and the clean wool fiber present in a lot of raw
D4845 Terminology Relating to Wool
wool by commercial-scale scouring of the lot followed by
laboratory tests on samples of the scoured wool.
3. Terminology
NOTE 1—The sampling of lots of raw wool in packages is covered in
3.1 For all terminology related to wool and wool felt, refer
Practice D1060, and the determination of the wool content of such
to Terminology D4845.
samples is covered in Test Method D584. The determination of vegetable
3.1.1 The following terms are relevant to this standard:
matter and other alkali-insoluble impurities in scoured wool is covered in
clean wool fiber present, other alkali-insoluble impurities,
Test Method D1113. For factors for the conversion of wool base content
oven-dried, raw wool, vegetable matter base, vegetable matter
to its equivalent in terms of scoured wool, top, or noil of various
commercially specified compositions, refer to Practice D2720.
present, wool base.
NOTE 2—The values stated in U.S. Customary Units are to be regarded
3.2 For all other terminology related to textiles, refer to
as the standard because of common commercial practice. The S.I. units in
Terminology D123.
parentheses are provided for information only.
NOTE 3—Becauseoftradepracticetheterm“weight”isusedinthistest
4. Summary of Test Method
method instead of the technically correct term “mass”.
4.1 The entire lot of raw wool is weighed, prepared,
1.2 This standard does not purport to address all of the
scoured, and dried in the usual commercial equipment, with
safety concerns, if any, associated with its use. It is the
special precautions against loss of wool at any stage of the
responsibility of the user of this standard to establish appro-
operations. The commercially dried scoured wool is weighed,
priate safety and health practices and determine the applica-
then sampled for laboratory determination of its oven-dried
bility of regulatory limitations prior to use.
weight (mass) and its content of alcohol-extractable matter,
mineral matter, vegetable-matter base, and other alkali-
2. Referenced Documents
insoluble impurities.The wool base content and the clean wool
2
2.1 ASTM Standards:
fiber present are calculated as percentages of the net weight
D123 Terminology Relating to Textiles
(mass) of the lot of raw wool.
D584 Test Method for Wool Content of Raw Wool—
Laboratory Scale
5. Significance and Use
D1060 Practice for Core Sampling of Raw Wool in Pack-
5.1 This test method is considered satisfactory for use as a
ages for Determination of Percentage of Clean Wool Fiber
referee method for the determination of the wool base content
Present
and the clean wool fiber present in a lot of raw wool. If there
D1113 Test Method for Vegetable Matter and OtherAlkali-
are differences of practical significance between reported test
Insoluble Impurities in Scoured Wool
results for two laboratories (or more), comparative test should
be performed to determine if there is a statistical bias between
them, using competent statistical assistance. As a minimum,
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD13onTextiles,
use the samples for such a comparative test that are as
and is the direct responsibility of Subcommittee D13.13 on Wool and Wool Felt.
homogenous as possible, drawn from the same lot of material
Current edition approved March 1, 2005. Published April 2005. Originally
as the samples that resulted in the disparate results during the
approved in 1954 . Last previous edition approved in 2005 as D1334 – 96(2005).
DOI: 10.1520/D1334-05.
initial testing and randomly assigned in equal numbers to each
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
laboratory. The test results from the laboratories involved
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
should be compared using a statistical test for unpaired data,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. probability level chosen prior to the testing series. If bias is
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