ASTM D1334-18

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D1334 − 18
Standard Test Method for
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 D584 Test Method for Wool Content of Raw Wool—
Laboratory Scale
1.1 This test method covers the determination of the wool
D1060 PracticeforCoreSamplingofRawWoolinPackages
base content and the clean wool fiber present in a lot of raw
for Determination of Percentage of Clean Wool Fiber
wool by commercial-scale scouring of the lot followed by
Present
laboratory tests on samples of the scoured wool.
D1113 Test Method for Vegetable Matter and Other Alkali-
NOTE 1—The sampling of lots of raw wool in packages is covered in
Insoluble Impurities in Scoured Wool
Practice D1060, and the determination of the wool content of such
D2720 Practice for Calculation of Commercial Weight and
samples is covered in Test Method D584. The determination of vegetable
Yield of Scoured Wool, Top, and Noil for Various Com-
matter and other alkali-insoluble impurities in scoured wool is covered in
mercial Compositions
Test Method D1113. For factors for the conversion of wool base content
to its equivalent in terms of scoured wool, top, or noil of various
D4845 Terminology Relating to Wool
commercially specified compositions, refer to Practice D2720.
NOTE 2—The values stated in U.S. Customary Units are to be regarded
3. Terminology
as the standard because of common commercial practice. The S.I. units in
parentheses are provided for information only.
3.1 For all terminology related to wool and wool felt, refer
NOTE 3—Because of trade practice the term “weight” is used in this test
to Terminology D4845.
method instead of the technically correct term “mass”.
3.1.1 The following terms are relevant to this standard:
1.2 The values stated in inch-pound units are to be regarded
clean wool fiber present, other alkali-insoluble impurities,
as standard. The values given in parentheses are mathematical
oven-dried, raw wool, vegetable matter base, vegetable matter
conversions to SI units that are provided for information only
present, wool base.
and are not considered standard.
3.2 For all other terminology related to textiles, refer to
1.3 This standard does not purport to address all of the
Terminology D123.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Summary of Test Method
priate safety, health, and environmental practices and deter-
4.1 The entire lot of raw wool is weighed, prepared,
mine the applicability of regulatory limitations prior to use.
scoured, and dried in the usual commercial equipment, with
1.4 This international standard was developed in accor-
special precautions against loss of wool at any stage of the
dance with internationally recognized principles on standard-
operations. The commercially dried scoured wool is weighed,
ization established in the Decision on Principles for the
then sampled for laboratory determination of its oven-dried
Development of International Standards, Guides and Recom-
weight (mass) and its content of alcohol-extractable matter,
mendations issued by the World Trade Organization Technical
mineral matter, vegetable-matter base, and other alkali-
Barriers to Trade (TBT) Committee.
insoluble impurities.The wool base content and the clean wool
fiber present are calculated as percentages of the net weight
2. Referenced Documents
(mass) of the lot of raw wool.
2.1 ASTM Standards:
D123 Terminology Relating to Textiles
5. Significance and Use
5.1 This test method is considered satisfactory for use as a
This test method is under the jurisdiction ofASTM Committee D13 on Textiles
referee method for the determination of the wool base content
and is the direct responsibility of Subcommittee D13.13 on Wool and Felt.
and the clean wool fiber present in a lot of raw wool. If there
Current edition approved July 1, 2018. Published July 2018. Originally approved
are differences of practical significance between reported test
in 1954. Last previous edition approved in 2009 as D1334 – 05 (2009) which was
withdrawn January 2018 and reinstated in July 2018. DOI: 10.1520/D1334-18.
results for two laboratories (or more), comparative test should
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
be performed to determine if there is a statistical bias between
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
them, using competent statistical assistance. As a minimum,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. use the samples for such a comparative test that are as
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D1334 − 18
homogenous as possible, drawn from the same lot of material 10.2 Grading and Sorting—If required, grade or sort the
as the samples that resulted in the disparate results during the weighed wool, or both. Treat each grade or sort, or both,
initial testing and randomly assigned in equal numbers to each separately as directed in 10.4, and each waste or off-sort, or
laboratory. The test results from the laboratories involved both, as directed in 10.5.
should be compared using a statistical test for unpaired data,
10.3 Opening and Dusting—If the use of a wool opener or
probability level chosen prior to the testing series. If bias is
duster is required prior to scouring, recover all wool wastes
found, either its cause must be found and corrected, or future
from these operations for treatment as directed in 10.5.
results for that material be adjusted in consideration of the
10.4 Treatment of Grades and Sorts—Separately treat each
known bias.
grade and sort as follows:
5.2 This test method is also used in studies aimed at
10.4.1 Scouring—Using Scouring Solution A in the first
deriving suitable formulas for estimating the allowances to be
bowl and Scouring Solution B in the second bowl, both at 526
made for wool unavoidably lost or destroyed in such commer-
3°C, scour and rinse by the usual commercial procedure. Make
cial operations as carding, combing, or carbonizing.
surethattheequipmentisfreeofwoolbothbeforeandafterthe
scouring and that all wool wastes are recovered.
6. Apparatus
10.4.2 Drying—Dry the scoured wool at the temperature
6.1 Wool Opener, Scouring Bowl Train, Dryer—Usual com-
and under the operating conditions customary with the equip-
mercial equipment, with accessories, modified, if necessary, to
ment being used and the type of wool involved. Make sure that
prevent loss of any significant quantity of wool.
the equipment is free of wool both before and after the drying
6.2 Laboratory Apparatus, for the determination of oven-
and that all wool wastes are recovered. Store the dried wool,
dried weight (mass), alcohol-extractable matter, mineral
either in bulk form or packaged, for at least 24 h, preferably in
matter, and total alkali-insoluble impurities, as described in
a space having an atmosphere not subject to large variations in
Test Methods D584 and D1113.
temperature or humidity during that period.
10.4.3 Weighing—Determine to the nearest 1 lb (0.5 kg
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