ASTM D3025-01
(Practice)Standard Practice for Standardizing Cotton Fiber Test Results by Use of Calibration Cotton Standards
Standard Practice for Standardizing Cotton Fiber Test Results by Use of Calibration Cotton Standards
SCOPE
1.1 This practice covers the use of reference standard cottons for the standardization of instruments and techniques used to test cotton fibers in various laboratories.
1.2 Standardization may be achieved by application of a correction factor based on the reference standards, or by modification of the technique in use.
Note 1--When reference standards are used to develop correction factors, or to adjust an operator's technique, no instrument calibration processes are involved. The term "Calibration" is properly used for the application or assignment of permanent scales or marks to an instrument. Adjustments can be made to specific instruments and accessories such as orifices, metallic strips, or cellophane sheets, in order to obtain the prescribed values with a specific instrument. Since an operator's technique or the interpretation of a method or procedure is inherently variable, it cannot be calibrated, that is, assigned a permanent, definite value. The use of reference standards, however, affords a means for standardizing techniques and checking the reliability of observed results.
1.3 This practice recognizes two types of reference standards: (1) calibration cotton standards (see 6.1) and (2) working cotton standards (see 6.2 ).
1.4 The instructions included in this practice can be used with cotton fibers in any form suitable for testing with the particular instrument to be used.
1.5 The instructions in the practice are applicable to cotton fibers but can also be applied to specific blends of cotton and other fibers, or to other fibers that can be tested with the instruments designed for testing cotton fibers. No information is available, however, to show that test procedures standardized with reference cotton samples are equally reliable with various cotton fiber blends or with other fibers.
Note 2--Standardization procedures covered in this practice are recommended for use with the following: Test Methods D1440, D1445, D1447, and D1448.
1.6 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 consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:D3025–01
Standard Practice for
Standardizing Cotton Fiber Test Results by Use of
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Calibration Cotton Standards
This standard is issued under the fixed designation D 3025; 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 responsibility of the user of this standard to consult and
establish appropriate safety and health practices and deter-
1.1 This practice covers the use of reference standard
mine the applicability of regulatory limitations prior to use.
cottons for the standardization of instruments and techniques
used to test cotton fibers in various laboratories.
2. Referenced Documents
1.2 Standardization may be achieved by application of a
2.1 ASTM Standards:
correction factor based on the reference standards, or by
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D 123 Terminology Relating to Textiles
modification of the technique in use.
D 1440 Test Method for Length and Length Distribution of
NOTE 1—When reference standards are used to develop correction 2
Cotton Fibers (Array Method)
factors, or to adjust an operator’s technique, no instrument calibration
D 1445 Test Method for Breaking Strength and Elongation
processes are involved. The term “Calibration” is properly used for the
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of Cotton Fibers (Flat Bundle Method)
application or assignment of permanent scales or marks to an instrument.
D 1447 Test Method for Length and Length Uniformity of
Adjustments can be made to specific instruments and accessories such as
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Cotton Fibers By Fibrograph Measurement
orifices, metallic strips, or cellophane sheets, in order to obtain the
prescribedvalueswithaspecificinstrument.Sinceanoperator’stechnique
D 1448 Test Method for Micronaire Reading of Cotton
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or the interpretation of a method or procedure is inherently variable, it
Fibers
cannot be calibrated, that is, assigned a permanent, definite value. The use
of reference standards, however, affords a means for standardizing
3. Terminology
techniques and checking the reliability of observed results.
3.1 Definitions:
1.3 This practice recognizes two types of reference stan-
3.1.1 calibration cotton standard, n—cotton samples taken
dards: (1) calibration cotton standards (see 6.1) and (2)
from blended bulk source on which fiber properties have been
working cotton standards (see 6.2).
determined under the International Calibration Cotton Stan-
1.4 The instructions included in this practice can be used
dards Program. (Syn. international calibration cotton)
with cotton fibers in any form suitable for testing with the
3.1.2 reference standard, n— in cotton testing, a homoge-
particular instrument to be used.
neous lot of cotton having a known or accepted value for one
1.5 The instructions in the practice are applicable to cotton
or more physical properties.
fibers but can also be applied to specific blends of cotton and
3.1.3 working cotton standard, n—a reference standard
other fibers, or to other fibers that can be tested with the
developed primarily for use within a specific laboratory. (Syn.
instruments designed for testing cotton fibers. No information
within-laboratory cotton standard)
isavailable,however,toshowthattestproceduresstandardized
3.2 For definitions of other terms used in this practice, refer
with reference cotton samples are equally reliable with various
to Terminology D 123.
cotton fiber blends or with other fibers.
4. Summary of Practice
NOTE 2—Standardization procedures covered in this practice are rec-
4.1 Testing instruments are adjusted in accordance with
ommended for use with the following: Test Methods D 1440, D 1445,
D 1447, and D 1448. engineering principles to ensure that they correspond properly
to the manufacturer’s calibration scales and instructions for the
1.6 This standard does not purport to address all of the
operation of the instrument.
safety concerns, if any, associated with its use. It is the
4.2 Technicians are instructed to operate testings instru-
ments in a consistent manner utilizing appropriate prescribed
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ASTM methods.
ThispracticeisunderthejurisdictionofASTMCommitteeD13onTextilesand
is the direct responsibility of Subcommittee D13.11 on Cotton Fibers.
Current edition approved May 10, 2001. Published May 2001. Originally
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published as D 3025–72 T. Last previous edition D 3025–86 (1999). 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.
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D3025
4.3 Specimens of the working cotton standard or calibration tion of the established values, testing may be started on
cotton standard are test
...
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