ASTM D2812-95
(Test Method)Standard Test Method for Non-Lint Content of Cotton
Standard Test Method for Non-Lint Content of Cotton
SCOPE
1.1 This test method covers the determination of the non-lint content of cotton which may be ( ) raw stock, that is, cotton fiber that has been separated from the seed by ginning; ( ) partially processed cotton, such as picker lap or sliver; or ( ) ginning or processing waste, such as obtained from ginning, opening and cleaning, picking, carding, or combing machines.
1.2 This test method is especially adapted for determining non-lint content of cotton by use of either the Shirley Analyser or SRRL Non-Lint Tester.
1.3 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems 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. For specific hazard statements, see Section 10.
General Information
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Standards Content (Sample)
Designation: D 2812 – 95
Standard Test Method for
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Non-Lint Content of Cotton
This standard is issued under the fixed designation D 2812; 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.
TABLE 1 Confidence Limits in Percentage Points at the 95 %
1. Scope
Probability Level
1.1 This test method covers the determination of the non-
Number of Confidence Limits
lint content of cotton using the Shirley Analyzer. The cotton
Specimens Shirley Analyzer
may be in the form of (1) raw stock, that is, cotton fiber that has 2 6 0.7
3 6 0.5
been separated from the seed by ginning; (2) partially pro-
9 6 0.3
cessed cotton, such as picker lap or sliver; or (3) ginning or
processing waste, such as obtained from ginning, opening and
cleaning, picking, carding, or combing machines.
3.1.5 non-lint content, n—that portion of a mass of cotton
1.2 This test method is especially adapted for determining
fiber which is essentially foreign matter.
non-lint content of cotton by use of the Shirley Analyser.
3.1.6 visible waste, n—in cotton testing, foreign matter
1.3 The values stated in SI units are to be regarded as the
deposited in the waste boxes of the machine during the test.
standard. The values given in parentheses are for information
only.
4. Summary of Test Method
1.4 This standard does not purport to address all of the
4.1 A known mass of raw cotton, partially processed cotton,
safety concerns, if any, associated with its use. It is the
or waste is fed into the machine. The machine, operating on
responsibility of the user of this standard to establish appro-
mechanical-pneumatic principles, separates the foreign matter
priate safety and health practices and determine the applica-
from the cotton and discharges the non-lint particles and lint
bility of regulatory limitations prior to use. For specific hazard
into separate chambers.
statements, see Section 7.
4.2 The amounts of lint and non-lint recovered are calcu-
2. Referenced Documents lated as a percentage of the original specimen mass.
2.1 ASTM Standards:
5. Significance and Use
2
D 123 Terminology Relating to Textiles Materials
2 5.1 This test method for testing cotton for non-lint content is
D 1441 Practice for Sampling Cotton Fibers for Testing
considered satisfactory for acceptance testing of commercial
3. Terminology shipments since it is the best available procedure for obtaining
objective data.
3.1 Definitions—For definitions of textile terms used in this
5.1.1 In case of a dispute arising from differences in
test method, refer to Terminology D 123.
reported test results when using this test method for acceptance
3.1.1 foreign matter, n—in cotton, non-lint material com-
testing of commercial shipments, the purchaser and the sup-
monly referred to as waste or trash such as dust, sand,
plier should conduct comparative tests to determine if there is
seed-coat fragments, leaves, and stems normally present in raw
a statistical bias between their laboratories. Competent statis-
and partially processed cotton.
tical assistance is recommended for the investigation of bias.
3.1.2 invisible waste, n—in cotton testing, weight loss due
As a minimum, the two parties should take a group of test
to dust, moisture, loose fibers, etc., carried away by the air
specimens that are as homogeneous as possible and that are
stream during the test.
from a lot of material of the type in question. The test
3.1.3 lint, n—in loose cotton, fibers mostly of spinnable
specimens should then be randomly assigned in equal numbers
length.
to each laboratory for testing. The average results from the two
3.1.4 lint content, n—that portion of a mass of cotton fiber
laboratories should be compared using Student’s t-test for
consisting of fiber, including normal moisture content, but
unpaired data and an acceptable probability level chosen by the
excluding foreign matter.
two parties before the testing is begun. If a bias is found, either
its cause must be found and corrected or the purchaser and the
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This test method is under the jurisdiction of ASTM Committee D-13 on Textiles
supplier must agree to interpret future test results with consid-
and is the direct responsibility of Subcommittee D13.11 on Cotton Fibers.
eration to the known bias.
Current edition approved July 15, 1995. Published September 1995. Originally
5.2 This test method gives data on the non-lint content of
published as D 2812 – 69 T. Last previous edition D 2812 – 88.
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Annual Book of ASTM Standards, Vol 07.01. raw cotton which can be used as a basis for: (1) estimating the
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D 2812
net amount of manufactured textile product obtainable from room in whi
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