ASTM D1334-96

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D1334–96
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 3.1.1 clean wool fiber present, n—in raw wool, the mass of
wool base present in the raw wool, adjusted to a moisture
1.1 This test method covers the determination of the wool
content of 12 %, an alcohol-extractable content of 1.5 %, and a
base content and the clean wool fiber present in a lot of raw
mineral matter content of 0.5 %.
wool by commercial-scale scouring of the lot followed by
3.1.1.1 Discussion—the term “clean wool fiber present” is
laboratory tests on samples of the scoured wool.
synonymous with the term “absolute clean content” as defined
NOTE 1—The sampling of lots of raw wool in packages is covered in
in the Tariff Schedules of the United States of America. (See
Practice D 1060, and the determination of the wool content of such
Test Method D 584.)
samples is covered in Test Method D 584. The determination of vegetable
3.1.2 other alkali-insoluble impurities, n—in scoured wool,
matter and other alkali-insoluble impurities in scoured wool is covered in
the oven-dried, ash-free, alcohol-extractives-free, alkali-
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 insoluble substances other than vegetable matter base, such as
commercially specified compositions, refer to Practice D 2720.
skin, cotton or other fibers, paper, string, tag (dung) pieces, and
NOTE 2—The values stated in U.S. Customary Units are to be regarded
paint pieces. etc.
as the standard because of common commercial practice. The S.I. units in
3.1.3 oven-dried, adj—the condition of a material that has
parentheses are provided for information only.
been heated under prescribed conditions of temperature and
NOTE 3—Becauseoftradepracticetheterm“weight”isusedinthistest
humidity until there is no further significant change in its mass.
method instead of the technically correct term “mass”.
3.1.3.1 Discussion—The conditions prescribed in this test
1.2 This standard does not purport to address all of the
method are heating at 105 6 2°C in a forced-draft oven
safety concerns, if any, associated with its use. It is the
supplied with air from an atmosphere having a relative
responsibility of the user of this standard to establish appro-
humidity of 656 2 % at a temperature of 20 6 2°C. A
priate safety and health practices and determine the applica-
temperature of 20 6 2°C is used in this test method instead of
bility of regulatory limitations prior to use.
21.1 6 1°C because international testing is frequently in-
volved.
2. Referenced Documents
3.1.4 raw wool, n—wool or hair of the sheep in the grease,
2.1 ASTM Standards:
pulled or scoured state (see also, scoured wool).
D 123 Terminology Relating to Textiles
3.1.5 vegetable matter base, n—in raw wool, oven-dried
D 584 Test Method for Wool Content of Raw Wool—
scoured burrs, seeds, twigs, leaves, and grasses, free of mineral
Laboratory Scale
matter and alcohol-extractable matter.
D 1060 Practice for Core Sampling of Raw Wool in Pack-
3.1.6 vegetable matter present, n—in raw wool, the weight
ages for Determination of Percentage of Clean Wool Fiber
of vegetable matter base present in the raw wool, adjusted to a
Present
moisture content of 12 %, an alcohol-extractives content of
D 1113 Test Method for Vegetable Matter and OtherAlkali-
1.5 %, and a mineral matter content of 0.5 %.
Insoluble Impurities in Scoured Wool
3.1.7 wool base, n—oven-dried scoured wool free of
D 2720 Practice for Calculation of Commercial Weight and
alcohol-extractable matter, mineral matter, vegetable matter,
Yield of Scoured Wool, Top, and Noil for Various Com-
and all impurities.
mercial Compositions
3.1.8 For definitions of other textile terms used in this
method, refer to Terminology D 123.
3. Terminology
3.1 Definitions:
4. Summary of Test Method
4.1 The entire lot of raw wool is weighed, prepared,
This method is under the jurisdiction of ASTM Committee D-13 on Textiles, scoured, and dried in the usual commercial equipment, with
and is the direct responsibility of Subcommittee D13.13 on Wool and Wool Felt.
special precautions against loss of wool at any stage of the
Current edition approved Oct. 10, 1996. Published February 1997. Originally
operations. The commercially dried scoured wool is weighed,
published as D 1334 – 54 T. Last previous edition D 1334 – 94.
then sampled for laboratory determination of its oven-dried
Annual Book of ASTM Standards, Vol 07.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D1334
weight (mass) and its content of alcohol-extractable matter, 10.2 Grading and Sorting—If required, grade or sort the
mineral matter, vegetable-matter base, and other alkali- weighed wool, or both. Treat each grade or sort, or both,
insoluble impurities.The wool base content and the clean wool separately as directed in 10.4, and each waste or off-sort, or
fiber present are calculated as percentages of the net weight both, as directed in 10.5.
(mass) of the lot of raw wool.
10.3 Opening and Dusting—If the use of a wool opener or
duster is required prior to scouring, recover all wool wastes
5. Significance and Use
from these operations for treatment as directed in 10.5.
10.4 Treatment of Grades and Sorts—Separately treat each
5.1 This test method is considered satisfactory for use as a
referee method for the determination of the wool base content grade and sort as follows:
and the clean wool fiber present in a lot of raw wool.
10.4.1 Scouring—Using Scouring Solution A in the first
5.2 This test method is also used in studies aimed at
bowl and Scouring Solution B in the second bowl, both at 526
deriving suitable formulas for estimating the allowances to be
3°C, scour and rinse by the usual commercial procedure. Make
made for wool unavoidably lost or destroyed in such commer-
surethattheequipmentisfreeofwoolbothbeforeandafterthe
cial operations as carding, combing, or carbonizing.
scouring and that all wool wastes are recovered.
10.4.2 Drying—Dry the scoured wool at the temperature
6. Apparatus
and under the operating conditions customary with the equip-
ment being used and the type of wool involved. Make sure that
6.1 Wool Opener, Scouring Bowl Train, Dryer—Usual com-
the equipment is free of wool both before and after the drying
mercial equipment, with accessories, modified, if necessary, to
and that all wool wastes are recovered. Store the dried wool,
prevent loss of any significant quantity of wool.
either in bulk form or packaged, for at least 24 h, preferably in
6.2 Laboratory Apparatus, for the determination of oven-
a space having an atmosphere not subject to large variations in
dried weight (mass), alcohol-extractable matter, mineral mat-
ter, and total alkali-insoluble impurities, as described in Test temperature or humidity during that period.
Methods D 584 and D 1113.
10.4.3 Weighing—Determine to the nearest 1 lb (0.5 kg) the
6.3 Scales, accurate to 1 lb (0.5 kg), for weighing the raw
n
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