ASTM D2720-94(2006)
(Practice)Standard Practice for Calculation of Commercial Weight and Yield of Scoured Wool, Top, and Noil for Various Commercial Compositions
Standard Practice for Calculation of Commercial Weight and Yield of Scoured Wool, Top, and Noil for Various Commercial Compositions
ABSTRACT
This practice details directions for the calculation of the commercial weight of wool corresponding to different commercial designations for several forms of wool, and for converting the commercial weight (mass) calculated on one basis to the commercial weight calculated on a different basis. This practice also includes directions for calculating the yield, on various commercial designation bases, obtained by processing raw wool, and for converting the yield calculated on one commercial designation basis to the yield on another commercial designation basis. Included here are the commercial compositions corresponding to different commercial designations for scoured wool, wool top, and wool noil, all of which contain, in addition to wool base, various percentages of moisture, material extractable with alcohol, and mineral matter.
SCOPE
1.1 This practice includes, in , the commercial composition corresponding to different commercial designations for scoured wool, wool top, and wool noil, all of which contain, in addition to wool base, various percentages of moisture, material extractable with alcohol, and mineral matter.
1.2 This practice includes directions for the calculation of the commercial weight of wool corresponding to different commercial designations for several forms of wool, and for converting the commercial weight (mass) calculated on one basis to the commercial weight calculated on a different basis.
1.3 This practice also includes directions for calculating the yield, on various commercial designation bases, obtained by processing raw wool, and for converting the yield calculated on one commercial designation basis to the yield on another commercial designation basis.
Note 1 - Because of trade practice the term "weight" is used in this practice 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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Designation:D2720–94 (Reapproved 2006)
Standard Practice for
Calculation of Commercial Weight and Yield of Scoured
Wool, Top, and Noil for Various Commercial Compositions
This standard is issued under the fixed designation D2720; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
TABLE 1 Commercial Composition of Commercially
1. Scope
Designated Scoured Wool, Wool Top, and Wool Noil
1.1 This practice includes, in Table 1, the commercial
Percentage
composition corresponding to different commercial designa-
Other
tions for scoured wool, wool top, and wool noil, all of which
Wool Base Moisture Compo-
contain, in addition to wool base, various percentages of
nents
moisture,materialextractablewithalcohol,andmineralmatter.
A
ASTM Clean Wool Fiber Present 86.0000 12.0000 2.0000
B
1.2 This practice includes directions for the calculation of
U.S. Customs Absolute Clean Content 86.0000 12.0000 2.0000
C
IWTO Clean Wool Content 83.5299 14.5299 1.9402
the commercial weight of wool corresponding to different
D,E
American Oil Combed Top 82.4222 13.0435 4.5343
commercial designations for several forms of wool, and for
D,E
American Oil Combed Noil 83.4113 12.0000 4.5887
D,E
converting the commercial weight (mass) calculated on one
American Dry Combed Top 84.1454 13.0435 2.8111
D,E
American Dry Combed Noil 85.1552 12.0000 2.8448
basis to the commercial weight calculated on a different basis.
D,E
Bradford Oil Combed Top 79.2980 15.9664 4.7356
1.3 This practice also includes directions for calculating the
D,E
Bradford Oil Combed Noil 82.7760 12.2807 4.9433
D,E
yield, on various commercial designation bases, obtained by Bradford Dry Combed Top 82.6449 15.4334 1.9217
D,E
Bradford Dry Combed Noil 85.7260 12.2807 1.9933
processingrawwool,andforconvertingtheyieldcalculatedon
C
IWTO Noble Oil Combed Top 79.2995 15.9664 4.7341
one commercial designation basis to the yield on another C
IWTO Noble Oil Combed Noil 82.7775 12.2807 4.9418
C
commercial designation basis. IWTO Noble Dry Combed Top 82.6469 15.4334 1.9197
C
IWTO Noble Dry Combed Noil 85.7281 12.2807 1.9912
C
NOTE 1—Because of trade practice the term “weight” is used in this Schlumberger Oil Combed Top 79.2995 15.9664 4.7341
C
Schlumberger Oil Combed Noil 81.3503 13.7931 4.8566
practice instead of the technically correct term “mass”.
C
Schlumberger Dry Combed Top 82.6469 15.4334 1.9197
C
1.4 This standard does not purport to address all of the
Schlumberger Dry Combed Noil 84.2500 13.7931 1.9569
safety concerns, if any, associated with its use. It is the A
ASTM Method D584, Test for Wool Content of Raw Wool, Laboratory Scale.
B
Tariff Schedules of the United States of America (1975), Schedule 3, Part 1,
responsibility of the user of this standard to establish appro-
Subpart C, Headnote 1(c).
priate safety and health practices and determine the applica-
C
IWTO Core Test Regulations, 1974, International Wool Textile Organization.
bility of regulatory limitations prior to use. D
Circular No. 3267, Nov. 10, 1954, Boston Wool Trade Assn.
E
Circular No. 4899, Nov. 2, 1967, Boston Wool Trade Assn.
2. Referenced Documents
2.1 ASTM Standards:
components in wool to which a specific commercial designa-
D123 Terminology Relating to Textiles
tion is applied. (Compare commercial weight.)
D584 Test Method for Wool Content of Raw Wool—
3.1.2 commercial designation, n— in wool, a term applied
Laboratory Scale
to a lot of wool in a stated form, and having a specified
3. Terminology
commercial composition.
3.1.3 commercialweight,n—billedweightasdeterminedby
3.1 Definitions:
a generally accepted method or as agreed to by the purchaser
3.1.1 commercial composition, n— in wool,thepercentages
and the seller.
by weight of wool base, moisture, and other nonwool-base
3.1.3.1 Discussion—For shipments of commercially desig-
nated scoured wool, wool top, or wool noil, the generally
ThispracticeisunderthejurisdictionofASTMCommitteeD13onTextilesand
accepted commercial weight is the weight of wool base
is the direct responsibility of Subcommittee D13.13 on Wool and Wool Felt.
contained in the shipment as determined by definite prescribed
Current edition approved Aug. 15, 2006. Published October 2006. Originally
methods, plus the weights of moisture and other components
approved in 1968. Last previous edition approved in 2000 as D2720–94(2000).
DOI: 10.1520/D2720-94R06.
corresponding to the commercial composition of the commer-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
cially designated material. Table 1 lists the common commer-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
cial designations for scoured wool, wool top, and wool noil,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. and their respective commercial compositions.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D2720–94 (2006)
TABLE 2 Wool Yield Conversion Factors
NOTE 1—Factors in this table are those generally used by the wool trade in the United States ofAmerica to convert certain commercially designated
estimated yields from one basis to another.
U.S. Customs American Oil American Dry Bradford Oil Bradford Dry
From To
A B B
Clean Yield Combed Yield Combed Yield Combed Yield Combed Yield
A
U.S. Customs Clean Yield . 1.0419 1.0206 1.0790 1.0361
American Oil Combed Yield 0.9598 . 0.9795 1.0356 0.9944
American Dry Combed Yield 0.9798 1.0209 . 1.0573 1.0152
B
Bradford Oil Combed Yield 0.9267 0.9656 0.9458 . 0.9602
B
Bradford Dry Combed Yield 0.9651 1.0056 0.9850 1.0414 .
A
U.S. Customs Clean Yield = U.S. Customs Absolute Clean Content minus allowance for processing loss.
B
Thesetermsshouldnotbeconfusedwiththesimilarcommonlyusedterms“BradfordOilCombedTopandNoilYield’’and“BradfordDryCombedTopandNoilYield.’’
The latter terms are based on estimated processing allowances and a ratio of top to noil that are different from those on which this table is based.
3.1.4 oven-dried, adj—the condition of a material that has 5.1.2 The commercial compositions are used also in calcu-
been heated under prescribed conditions of temperature and lations to convert the commercial weight of a lot of wool
humidityuntilthereisnofurthersignificantchangeinitsmass. having a named commercial designation (for example,Ameri-
3.1.4.1 Discussion—As the term “oven-dried” is used in can Oil Combed Top) to the equivalent commercial weight on
this recommended practice, the prescribed conditions are a different commercial designation basis (for example, Brad-
heating to 105 6 2°C in a forced-draft oven supplied with air ford Dry Combed Top).
from an atmosphere having a relative humidity of 65 62%at 5.2 Calculation of Commercial Weight— To adjust the
atemperatureof20 62°C.Atemperatureof20 62°Cisused observedweightofalotofwooltowhichanamedcommercial
in this recommended practice instead of 21.1 6 1°C because designation is applied to its commercial weight, determine the
international testing is frequently involved. composition of the lot of wool at the time of weighing and use
3.1.5 vegetable matter base, n— in raw wool, oven-dried Eq 1:
scouredburrs,seeds,twigs,leaves,andgrasses,freeofmineral
W 5 O 3 ~b/B! (1)
matter and alcohol-extractable matter.
where:
3.1.6 wool base, n—oven-dried scoured wool free of
W = commercial weight of the lot,
alcohol-extractable matter, mineral matter, vegetable matter,
O = observed weight of the lot,
and all impurities.
B = percentage of wool base specified in the applicable
3.1.7 yield, n—of wool, the percentage of a designated
commercial composition (Table 1), and
commercial composition obtained by processing a lot of raw
b = observed wool base content, as a percentage of the
wool. (See also commercial composition.)
observed weight of the lot.
3.1.8 For the definition of wool and other textile terms used
5.3 Conversion of Commercial Weights— To convert the
in this practice, refer to Terminology D123.
commercialweightofalotofwool(5.2)fromonecommercial
designation basis to another, use Eq 2:
4. Commercial Compositions of Commercially
Designated Wool
W 5 W 3
...
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