ASTM D1334-96(2005)

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Designation:D1334–96 (Reapproved 2005)
Standard Test Method for
Wool Content of Raw Wool—Commercial Scale
This standard is issued under the fixed designation D 1334; 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 mercial Compositions
1.1 This test method covers the determination of the wool
3. Terminology
base content and the clean wool fiber present in a lot of raw
3.1 Definitions:
wool by commercial-scale scouring of the lot followed by
3.1.1 clean wool fiber present, n—in raw wool, the mass of
laboratory tests on samples of the scoured wool.
wool base present in the raw wool, adjusted to a moisture
NOTE 1—The sampling of lots of raw wool in packages is covered in
content of 12 %, an alcohol-extractable content of 1.5 %, and a
Practice D 1060, and the determination of the wool content of such
mineral matter content of 0.5 %.
samples is covered in Test Method D 584. The determination of vegetable
3.1.1.1 Discussion—the term “clean wool fiber present” is
matter and other alkali-insoluble impurities in scoured wool is covered in
synonymous with the term “absolute clean content” as defined
Test Method D 1113. For factors for the conversion of wool base content
in the Tariff Schedules of the United States of America. (See
to its equivalent in terms of scoured wool, top, or noil of various
commercially specified compositions, refer to Practice D 2720.
Test Method D 584.)
NOTE 2—The values stated in U.S. Customary Units are to be regarded
3.1.2 other alkali-insoluble impurities, n—in scoured wool,
as the standard because of common commercial practice. The S.I. units in
the oven-dried, ash-free, alcohol-extractives-free, alkali-
parentheses are provided for information only.
insoluble substances other than vegetable matter base, such as
NOTE 3—Becauseoftradepracticetheterm“weight”isusedinthistest
skin, cotton or other fibers, paper, string, tag (dung) pieces, and
method instead of the technically correct term “mass”.
paint pieces. etc.
1.2 This standard does not purport to address all of the
3.1.3 oven-dried, adj—the condition of a material that has
safety concerns, if any, associated with its use. It is the
been heated under prescribed conditions of temperature and
responsibility of the user of this standard to establish appro-
humidity until there is no further significant change in its mass.
priate safety and health practices and determine the applica-
3.1.3.1 Discussion—The conditions prescribed in this test
bility of regulatory limitations prior to use.
method are heating at 105 6 2°C in a forced-draft oven
supplied with air from an atmosphere having a relative
2. Referenced Documents
humidity of 656 2 % at a temperature of 20 6 2°C. A
2.1 ASTM Standards:
temperature of 20 6 2°C is used in this test method instead of
D 123 Terminology Relating to Textiles
21.1 6 1°C because international testing is frequently in-
D 584 Test Method for Wool Content of Raw Wool—
volved.
Laboratory Scale
3.1.4 raw wool, n—wool or hair of the sheep in the grease,
D 1060 Practice for Core Sampling of Raw Wool in Pack-
pulled or scoured state (see also, scoured wool).
ages for Determination of Percentage of Clean Wool Fiber
3.1.5 vegetable matter base, n—in raw wool, oven-dried
Present
scoured burrs, seeds, twigs, leaves, and grasses, free of mineral
D 1113 Test Method forVegetable Matter and OtherAlkali-
matter and alcohol-extractable matter.
Insoluble Impurities in Scoured Wool
3.1.6 vegetable matter present, n—in raw wool, the weight
D 2720 Practice for Calculation of Commercial Weight and
of vegetable matter base present in the raw wool, adjusted to a
Yield of Scoured Wool, Top, and Noil for Various Com-
moisture content of 12 %, an alcohol-extractives content of
1.5 %, and a mineral matter content of 0.5 %.
1 3.1.7 wool base, n—oven-dried scoured wool free of
ThismethodisunderthejurisdictionofASTMCommitteeD13onTextiles,and
alcohol-extractable matter, mineral matter, vegetable matter,
is the direct responsibility of Subcommittee D13.13 on Wool and Wool Felt.
Current edition approved Jan. 1, 2005. Published March 2005. Originally
and all impurities.
approved in 1954 . Last previous edition approved in 1996 as D 1334 – 96.
3.1.8 For definitions of other textile terms used in this
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
method, refer to Terminology D 123.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D1334–96 (2005)
4. Summary of Test Method 10. Procedure
4.1 The entire lot of raw wool is weighed, prepared,
10.1 Weighing—Determine the net weight (mass) of the lot
scoured, and dried in the usual commercial equipment, with
by weighing each package of raw wool to the nearest 1 lb (0.5
special precautions against loss of wool at any stage of the
kg) and deducting the known or ascertained tare.
operations. The commercially dried scoured wool is weighed,
10.2 Grading and Sorting—If required, grade or sort the
then sampled for laboratory determination of its oven-dried
weighed wool, or both. Treat each grade or sort, or both,
weight (mass) and its content of alcohol-extractable matter,
separately as directed in 10.4, and each waste or off-sort, or
mineral matter, vegetable-matter base, and other alkali-
both, as directed in 10.5.
insoluble impurities.The wool base content and the clean wool
10.3 Opening and Dusting—If the use of a wool opener or
fiber present are calculated as percentages of the net weight
duster is required prior to scouring, recover all wool wastes
(mass) of the lot of raw wool.
from these operations for treatment as directed in 10.5.
10.4 Treatment of Grades and Sorts—Separately treat each
5. Significance and Use
grade and sort as follows:
5.1 This test method is considered satisfactory for use as a
10.4.1 Scouring—Using Scouring Solution A in the first
referee method for the determination of the wool base content
bowl and Scouring Solution B in the second bowl, both at 526
and the clean wool fiber present in a lot of raw wool.
3°C, scour and rinse by the usual commercial procedure. Make
5.2 This test method is also used in studies aimed at
surethattheequipmentisfreeofwoolbothbeforeandafterthe
deriving suitable formulas for estimating the allowances to be
scouring and that all wool wastes are recovered.
made for wool unavoidably lost or destroyed in such commer-
10.4.2 Drying—Dry the scoured wool at the temperature
cial operations as carding, combing, or carbonizing.
and under the operating conditions customary with the equip-
ment being used and the type of wool involved. Make sure that
6. Apparatus
the equipment is free of wool both before and after the drying
6.1 Wool Opener, Scouring Bowl Train, Dryer—Usual com-
and that all wool wastes are recovered. Store the dried wool,
mercial equipment, with accessories, modified, if necessary, to
either in bulk form or packaged, for at least 24 h, preferably in
prevent loss of any significant quantity of wool.
a space having an atmosphere not subject to large variations in
6.2 Laboratory Apparatus, for the determination of oven-
temperature or humidity
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