ASTM D1441-00

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An American National Standard
Designation:D1441–00
Standard Practice for
Sampling Cotton Fibers for Testing
This standard is issued under the fixed designation D 1441; 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 Cotton Fibers by Fibrograph Measurement
D 1448 Test Method for Micronaire Reading of Cotton
1.1 This practice covers procedures for taking a lot sample,
Fibers
at the source, of cotton fibers and reducing this sample through
D 1464 Test Method for Differential Dyeing Behavior of
a series of steps to provide a relatively small test specimen of
Cotton
loose cotton fibers, representative of the source material and
D 1776 Practice for Conditioning and Testing Textiles
suitableforthedeterminationofasingleproperty,oraseriesof
D 2480 Test Method for Maturity Index and Linear Density
fiber properties, according to established procedures.
of Cotton Fibers by the Causticaire Method
1.2 This practice has been used extensively for commercial
D 2495 Test Method for Moisture in Cotton by Oven-
acceptance testing of cotton fibers as well as for arbitration
Drying
testing and research.
D 2812 Test Method for Non-Lint Content of Cotton
1.3 Theproceduresdonotcovertheselectionofsamplesfor
D 4271 Practice forWriting Statements on Sampling inTest
the determination of moisture. Special handling and protection
Methods for Textiles
of the sample from the prevailing atmosphere required for
samples taken for the determination of moisture are not
3. Terminology
provided for in this practice. See Test Method D 2495.
3.1 Definitions:
NOTE 1—Thispracticeisusedintakingsamplesofcottonfortestingby
3.1.1 laboratory sample, n—a portion of material taken to
Test Methods D 1440, D 1442, D 1445, D 1447, D 1448, D 1464, D 2480,
represent the lot sample, or the original material, and used in
D 2496, and D 2812.
the laboratory as a source of test specimens.
1.4 The values stated in SI units are to be regarded as
3.1.2 lot, n—in acceptance sampling of cotton, the main
standard. No other units of measure are included in this
stock, supply or source of the fibers to be sampled.
standard.
3.1.2.1 Discussion—The source may consist of one or more
1.5 This standard does not purport to address all of the
bolls, plants, or rows in a field; one or more bales, mixes, or
safety concerns, if any, associated with its use. It is the
blendsofcotton;oranyconsignment,shipment,orlotofcotton
responsibility of the user of this standard to establish appro-
or cotton products of any size or weight that is considered
priate safety and health practices and determine the applica-
sufficient to yield the test specimens required.
bility of regulatory limitations prior to use.
3.1.3 lot sample, n—in cotton, a relatively large sample
taken in the field to represent a consignment, shipment, or lot,
2. Referenced Documents
for use in the preparation of the laboratory samples.
2.1 ASTM Standards:
3.1.4 specimen, n—a specific portion of a material or a
D 123 Terminology Relating to Textiles
laboratory sample upon which a test is performed or which is
D 1440 Test Method for Length and Length Distribution of
selected for that purpose. (See also test specimen.)
Cotton Fibers (Array Method)
3.1.5 For definitions of other textile terms used in this
D 1442 Test Method for Maturity of Cotton Fibers (Sodium
practice, refer to Terminology D 123.
Hydroxide Swelling and Polarized Light Procedures)
D 1445 Test Method for Breaking Strength and Elongation 4. Summary of Practice
of Cotton Fibers (Flat Bundle Method)
4.1 Sampling procedures for obtaining samples from the lot
D 1447 Test Method for Length and Length Uniformity of
sample and for the reduction of the lot samples to the size
required for fiber test specimens are presented. Steps are
outlinedtosecurereductionoftheamountofcottonfiberstobe
This practice is under the jurisdiction of ASTM Committee D13 on Textiles,
handled at various stages, so that the reduced sample continues
and is the direct responsibility of Subcommittee D13.11 on Cotton Fibers.
Current edition approved Sept. 10, 2000. Published November 2000. Originally
e1
published as D 1441 – 52. Last previous edition D 1441 – 72 (1993) .
2 3
Annual Book of ASTM Standards, Vol 07.01. Annual Book of ASTM Standards, Vol 07.02.
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D1441
to be representative of the lot. Provision is made for the geneous, divide it into rational subgroups; for example, indi-
omission of intermediate steps in the reduction of the lot vidual bales in a commercial shipment, on the basis of
sample in cases where this is desirable or necessary. available information.
9.2.1 Take a sufficient number of samples to represent the
5. Significance and Use
source material adequately. The number of subsamples to be
5.1 The reliability of the results of any test method depend takenwillbedeterminedbythesizeandhomogeneityofthelot
primarily upon how well the specimens tested represent the sample, and the required precision of the results.
originalsourcematerial.Muchtimeandeffortarerequired,and 9.2.2 Take portions of cotton or cotton products from
can justifiably be spent, to be sure that all the sampling different parts of the source material carefully and at random to
operations are at random and are representative. Failure to provide a composite lot sample of sufficient size. Approxi-
provide a test specimen which accurately represents the mate- mately 100 g (4 oz) is sufficient for most purposes.
rial from which it is drawn will produce misleading test results
10. Laboratory Sample
regardless of the accuracy and precision of the test method.
10.1 Acceptance Testing—As a laboratory sample for ac-
6. Apparatus
ceptance testing, proceed as follows:
6.1 Mechanical Fiber Blender, designed especially for 10.1.1 For bales, take a 100 g (4 oz) subsample of cotton
cotton fibers (optional). from each of two opposite sides of each bale in the lot sample
6.2 Balance, 100 g capacity, 0.5 g sensitivity (optional). and combine the two subsamples into a single laboratory
sample weighing 200 g (8 oz).
7. Conditioning
10.1.2 For sliver, begin with the first material from the lead
7.1 For samples that are not to be blended, neither condi- end of the package that has a clean, uniform appearance, and
tioning nor preconditioning is required. take a length weighing at least 100 g (4 oz), as the laboratory
7.2 For samples that are to be blended, bring the lot sample sample. If the shipping containers in the lot sample contain
from the prevailing atmosphere to moisture equilibrium with multiple packages, take a laboratory sample from one package
the standard atmosphere for testing textiles as directed in drawn at random for each container.
10.1.3 For yarn on packages, take one package at ra
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