ASTM D519-04

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D519–04
Standard Test Method for
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Length of Fiber in Wool Top
This standard is issued under the fixed designation D 519; 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 For definitions of other textile terms used in this test
method, refer to Terminology D 123.
1.1 This test method covers the measurement of the average
length and length distribution of fibers in wool top, on a
4. Summary of Test Method
mass-biased basis. The method is applicable to all types of
4.1 The weight (mass) of fibers, in definite length incre-
fibers in sliver formed from long parallelized fibers.
ments, is determined for each specimen or group of specimens
NOTE 1—The determination of fiber length of wool is covered in Test
formingonesample.Fromthedataobtained,theweight-biased
Method D 1575, Test Method for Fiber Length of Wool in Scoured Wool
average fiber length and the weight-biased distribution is
and in Card Sliver, the staple length of grease wool is covered in Test
calculated. A cumulative weight average length frequency
Method D 1234, Test Method of Sampling and Testing Staple Length of
curve may be plotted.
Grease Wool.
NOTE 2—This test method specifically requires length in inches and
5. Significance and Use
mass in SI units and is not contrary to ASTM policy. The SI units in
parentheses are provided for information only.
5.1 Knowledge of the average fiber length and the distribu-
tion of fibers is of primary importance to users of top in further
1.2 This standard does not purport to address all of the
processing.
safety concerns, if any, associated with its use. It is the
5.2 Acceptance specifications for the fiber length and length
responsibility of the user of this standard to establish appro-
distributionmaybeestablishedbytheuserbasedonthetypeof
priate safety and health practices and determine the applica-
yarn-making equipment employed and the desired end uses.
bility of regulatory limitations prior to use.
5.3 Test Method D 519 for testing wool top for fiber length
2. Referenced Documents
is considered satisfactory for acceptance testing of commercial
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shipments since the method has been used extensively in the
2.1 ASTM Standards:
trade for acceptance testing and the current estimates of the
D 123 Terminology Relating to Textiles
between-laboratory precisions are acceptable.
D 1234 TestMethodofSamplingandTestingStapleLength
5.3.1 In case of a dispute arising from differences in
of Grease Wool
reported test results when using this test method for acceptance
D 1575 Test Method for Fiber Length of Wool in Scoured
testing of commercial shipments, the purchaser and the sup-
Wool and Card Sliver
plier should conduct comparative testing to determine if there
D 1776 Practice for Conditioning and Testing Textiles
is a statistical bias between their laboratories. Competent
D 2130 Test Method for Diameter of Wool and Other
statistical assistance is recommended for the investigation of
Animal Fibers by Microprojection
bias.As a minimum, the two parties should take a group of test
D 4845 Terminology for Wool
specimens that are as homogenous as possible and that are
3. Terminology
from a lot of the type material in question. The test specimens
should then be assigned in equal numbers to each laboratory
3.1 Definitions: For definition of textile terms used in this
for testing. The average results from the two laboratories
test method refer to Terminology D 4845.
should be compared using Student’s t-test for unpaired data
and an acceptable probability level chosen by the two parties
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ThistestmethodisunderthejurisdictionofASTMCommitteeD13onTextiles,
before testing is begun. If a bias is found either its cause must
and is the direct responsibility of Subcommittee D13.13 on Wool and Wool Felt.
be found and corrected or the purchaser and supplier must
Current edition approved March 1, 2004. Published March 2004. Originally
approved in 1938. Last previous edition approved in 2001 as D 519 – 90 (2001). agree to interpret future test results in the light of the known
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
bias.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standardsvolume information, refer to the standard’s Document Summary page on
the ASTM website
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D519–04
(Front View) (Rear View)
1—Frame. 5—Drawing clamp.
2—Faller bars. 6—Depressor.
3—Side comb. 7—Plush board.
4—Retaining bars.
...