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ASTM D2252-18

(Specification)

Standard Specification for Fineness of Types of Alpaca

Standard Specification for Fineness of Types of Alpaca

ABSTRACT
This specification is applicable in the classification of alpaca into types according to fineness. Five types of alpaca have been classified according to its average diameter limit, namely Type T Extra, Type T, Type X, Type AA, Type A, Type SK, and Type LP.
SIGNIFICANCE AND USE
4.1 This specification for fineness is intended as a guide for production, preparation, and marketing (Note 1) by comparing the average fiber diameter of a measured specimen with the fineness specifications for the various types listed in Table 1. The standard deviation which expresses measured variability of a specimen may be compared with the average shown in Table X2.1.  
Note 1: Test Method D2130 does not include any values for the precision to be expected in the testing of alpaca fibers. In an interlaboratory test in which six laboratories each made one test on each of six type samples, HTB-CB, HAXB-CB, HAAB-CB, HAB-CB, HLPB-CL, and HSKB-CL, the coefficient of variation of the average fiber diameters between laboratories, including test variation, was 3.2, 4.7, 3.8, 4.5, 2.2, and 0.93 % for the respective alpaca types.
SCOPE
1.1 This specification is applicable in the classification of alpaca into types according to fineness.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
30-Jun-2018
ICS
59.060.10 - Natural fibres
Technical Committee
D13 - Textiles
Drafting Committee
D13.13 - Wool and Felt
Current Stage
Ref Project

Relations

Refers
ASTM D123-15a - Standard Terminology Relating to Textiles
Effective Date
01-Sep-2015
Refers
ASTM D4845-10(2018) - Standard Terminology Relating to Wool
Effective Date
01-Jul-2018
Refers
ASTM D123-17 - Standard Terminology Relating to Textiles
Effective Date
01-Mar-2017
Refers
ASTM D123-15 - Standard Terminology Relating to Textiles
Effective Date
01-Apr-2015
Refers
ASTM D123-15b - Standard Terminology Relating to Textiles
Effective Date
15-Sep-2015
Referred By
ASTM D2130-22 - Standard Test Method for Diameter of Wool and Other Animal Fibers by Microprojection
Effective Date
01-Jul-2018
Referred By
ASTM D6466-10(2018) - Standard Test Method for Diameter of Wool and Other Animal Fibers By Sirolan-Laserscan Fiber Diameter Analyser
Effective Date
01-Jul-2018

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ASTM D2252-18 - Standard Specification for Fineness of Types of AlpacaASTM D2252-18 - Standard Specification for Fineness of Types of Alpaca
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ASTM D2252-18 - Standard Specification for Fineness of Types of Alpaca
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D2252 −18
Standard Specification for
1
Fineness of Types of Alpaca
This standard is issued under the fixed designation D2252; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
3.1 For definitions of textile terms used in this specification:
1.1 This specification is applicable in the classification of
alpaca, average fiber diameter, fineness, refer to Terminology
alpaca into types according to fineness.
D4845.
1.2 The values stated in inch-pound units are to be regarded
3.2 For definitions of other textile terms used in this
as standard. The values given in parentheses are mathematical
specification, refer to Terminology D123.
conversions to SI units that are provided for information only
and are not considered standard. 4. Significance and Use
4.1 This specification for fineness is intended as a guide for
1.3 This standard does not purport to address all of the
production, preparation, and marketing (Note 1) by comparing
safety concerns, if any, associated with its use. It is the
the average fiber diameter of a measured specimen with the
responsibility of the user of this standard to establish appro-
fineness specifications for the various types listed in Table 1.
priate safety, health, and environmental practices and deter-
The standard deviation which expresses measured variability
mine the applicability of regulatory limitations prior to use.
of a specimen may be compared with the average shown in
1.4 This international standard was developed in accor-
Table X2.1.
dance with internationally recognized principles on standard-
NOTE 1—Test Method D2130 does not include any values for the
ization established in the Decision on Principles for the
precision to be expected in the testing of alpaca fibers. In an interlabora-
Development of International Standards, Guides and Recom-
tory test in which six laboratories each made one test on each of six type
mendations issued by the World Trade Organization Technical
samples, HTB-CB, HAXB-CB, HAAB-CB, HAB-CB, HLPB-CL, and
Barriers to Trade (TBT) Committee.
HSKB-CL, the coefficient of variation of the average fiber diameters
between laboratories, including test variation, was 3.2, 4.7, 3.8, 4.5, 2.2,
and 0.93 % for the respective alpaca types.
2. Referenced Documents
2
5. Specification
2.1 ASTM Standards:
D123 Terminology Relating to Textiles 5.1 The fineness of various types of alpaca shall conform to
the average fiber diameter limits listed in Table 1.
D2130 Test Method for Diameter ofWool and OtherAnimal
Fibers by Microprojection
6. Sampling
D4845 Terminology Relating to Wool
6.1 Sample the material as directed in Test Method D2130.
7. Test Method
1
This specification is under the jurisdiction of ASTM Committee D13 on
7.1 Test the material as directed in Test Method D2130.
Textiles and is the direct responsibility of Subcommittee D13.13 on Wool and Felt.
Measure at least the minimum number of fibers specified to
Current edition approved July 1, 2018. Published August 2018. Originally
attain confidence limits of the mean of 60.5 µm at a probabil-
approved in 1964. Last previous edition approved in 2009 as D2252 – 05(2009)
which was withdrawn
...

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ASTM D2968-22(Test Method)
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SIGNIFICANCE AND USE
5.1 Test Method D2968 for the determination of med and kemp fibers by microprojection may be used for the acceptance testing of commercial shipments of wool and other animal fibers, but caution is advised since only a few types of animal fibers have been subjected to interlaboratory tests to ascertain the precision of tests for med and kemp fibers by this test method. Comparative tests as directed in 5.1.1 may be advisable.  
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5.2 Knowledge of the incidence of med fibers and kemp fibers in wool and other animal fibers is of importance to manufacturers of woven or knitted fabrics because of the apparent dye resistance and light reflectance qualities of these fibers. This is not to imply that all kemp fibers will resist dye and all med fibers will accept dye normally. In practice, a proportion of kemp fibers will appear normal after dyeing and a proportion of med fibers will appear chalky white after dyeing. From the perspective of visual and aesthetic problems, medullated fibers hav...
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1.1 This test method covers the determination by microprojection of the percentage of medullated fibers (med and kemp fibers) in wool or other animal fibers such as mohair, cashmere, alpaca, or camel's hair in their various forms.  
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ASTM D1576-22(Test Method)
Standard Test Method for Moisture in Wool by Oven-Drying

SIGNIFICANCE AND USE
5.1 Test Method D2462 for the determination of the moisture in wool by distillation with toluene is the preferred method for testing wool for moisture for the acceptance testing of commercial shipments. If, however, the purchaser and the supplier agree, Test Method D1576 for the determination of the moisture in wool by oven drying may be used instead. Comparative tests as directed in 5.1.1, may be advisable.  
5.1.1 In case of a dispute arising from differences in reported test results when using Test Method D1576 for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens which are as homogeneous as possible and which are from a lot of material of the type in question. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using Student's t-test for unpaired data and an acceptable probability level chosen by the two parties before testing is begun. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results in the light of the known bias.  
5.2 This test method is a simple and convenient method for routine process control, in-plant evaluation, estimation of moisture content of a lot of wool, or any other purpose for which a high degree of reproducibility is not necessary (see Section 13).
SCOPE
1.1 This test method covers the determination of the amount of moisture present in ordinary commercial and industrial samples of wool in all forms except grease wool, using the oven-drying technique.  
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ASTM D1294-22(Test Method)
Standard Test Method for Tensile Strength and Breaking Tenacity of Wool Fiber Bundles 1-in. (25.4 mm) Gage Length

SIGNIFICANCE AND USE
5.1 Test Method D1294 for the determination of tensile strength may be used for the acceptance testing of commercial shipments of wool, but caution is advised since technicians may fail to get good agreement between results. Comparative tests as directed in 5.1.1 may be advisable.  
5.1.1 If there are differences of practical significance between reported test results for two laboratories (or more), comparative test should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, use the samples for such a comparative test that are as homogenous as possible, drawn from the same lot of material as the samples that resulted in disparate results during initial testing and randomly assigned in equal numbers to each laboratory. The test results from the laboratories involved should be compared using a statistical test for unpaired data, a probability level chosen prior to the testing series. If bias is found, either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias.  
5.2 This test method is useful in studying the relationship between fiber strength and product quality; results should be considered comparative rather than fundamental since the strength found will be lower than the sum of the strengths of the individual fibers present due to slight differences in tensioning.  
5.3 Elongation may be obtained also but the accuracy of elongation measurements is limited and their determination is, therefore, not included as a formal part of this test method.  
5.4 The basic differences between the procedures employed in this test method and those of Test Method D2524 are in the gage lengths employed and the methods of clamping. In Test Method D2524, specific clamps are required whereas in Test Method D1294, any conventional clamps may be used. Results for breaking load determined by Test Method D2524 average 30 % higher than ...
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1.1 This test method covers the determination of the breaking force (or load) and estimation of the tensile strength and tenacity of wool fiber bundles with a 1-in. (25.4 mm) gage length. A procedure for preparation of the fiber bundle is included.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Because the instrument is calibrated in inch-pound units, inch-pound units are shown first, contrary to Committee D13 policy.  
Note 1: For other methods of measuring breaking tenacity of fiber bundles, refer to Test Methods D1445 and D2524.
Note 2: This test method can be used for other fibers that lend themselves to the same kind of preparation but the difference in density must be taken into account when calculating the tensile strength. It is not necessary to know or correct for the density of a fiber when calculating breaking tenacity.  
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ASTM D2130-22(Test Method)
Standard Test Method for Diameter of Wool and Other Animal Fibers by Microprojection

SIGNIFICANCE AND USE
5.1 This test method specifies a sampling and testing procedure for the measurement of average fiber diameter and variation in diameter of animal fibers as required in Test Method D2968.  
5.2 Test Method D2130 for testing wool and other animal fibers for average fiber diameter is considered satisfactory for acceptance testing of commercial shipments since current estimates of between-laboratory precision are acceptable and the method has been used extensively in the trade for acceptance testing. In cases of disagreement arising from differences in values reported by the purchaser and the seller when using this method for acceptance testing, the statistical bias, if any, between the laboratory of the purchaser and the laboratory of the seller should be determined with each comparison being based on the testing of specimens randomly drawn from one sample of material of the type being evaluated.
SCOPE
1.1 This test method covers a procedure, using the microprojector, for the determination of the average fiber diameter and the fiber diameter variation on wool and other animal fibers, such as mohair, cashmere, alpaca, camel's hair, etc. (Note 1) in their various forms.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
Note 1: This test method may also be applied to any fibers having a round cross section and accordingly may be used many times for melt-spun man-made fibers such as polyamides, polyesters, and glass; also it may be applied to a limited number of polyacrylics and regenerated cellulose type fibers. The values given in Appendix X1 for density and correction factors, however, apply only to wool and should not be used for other fibers. For suitable values for the density of other fibers, see Table 5 in Test Methods D629, Quantitative Analysis of Textiles.
Note 2: In subsequent sections of this test method, the term “wool” also signifies mohair or other fibers if the circumstances are applicable.
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ASTM D2524-22(Test Method)
Standard Test Method for Breaking Tenacity of Wool Fibers, Flat Bundle Method— 18 in. (3.2 mm) Gage Length

SIGNIFICANCE AND USE
5.1 Test Method D2524 for testing wool fibers for tenacity is considered satisfactory for acceptance testing when the participating laboratories, using a reference wool, have shown acceptable between-laboratory precision. It is recommended that any program of acceptance testing be preceded by an interlaboratory check in the laboratory of the purchaser and the laboratory of the seller on replicate specimens of samples of the material to be evaluated. In cases of dispute, the statistical bias, if any, between the laboratory of the purchaser and the seller should be determined with each comparison being based on testing randomized specimens from one sample of material of the type being evaluated.  
5.2 Values obtained from flat bundle tenacity show a good correlation with values obtained from single fiber tests and require much less time.  
5.3 The basic differences between the procedures described in Test Method D2524 and those described in Test Method D1294 lie in the manner of clamping the bundles and the shorter gage length employed. The special clamps used in this method allow quicker and easier bundle preparation; however, for Test Method D1294 no special clamps are required. Closer agreement with single fiber tenacity is also obtained with Test Method D2524 than when using the procedure in Test Method D1294.  
5.4 As the observed tenacity of fibers depends in part on the type of tensile testing machine used and the time required to break the specimen, results obtained with the different types of machines which may be used in this method will not necessarily agree. The machines specifically designed for bundle testing are CRL testers which operate at a loading rate of 1 kgf/s and therefore reach the breaking force at variable times in the order of 5 s. CRE and CRT type machines would be expected to produce somewhat different results not only because of the inherent difference in operation but because CRE and CRT type machines are to be operated at a rate to ac...
SCOPE
1.1 This test method covers the determination of the breaking tenacity of wool fibers as a flat bundle with a 1/8 in. (3.2 mm) clamp separation.  
1.2 This test method is especially adapted to the fiber bundle clamps and strength testing instruments specified, but may be used on other tensile testing machines when equipped with appropriate adapters to accommodate the prescribed clamps.  
1.3 This test method is applicable to wool in any form which can be hand-combed into small bundles of parallelized fibers.  
Note 1: Other test methods for measuring breaking tenacity of fiber bundles include Test Methods D1294, D1445, and D540.  
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ASTM D2462-22(Test Method)
Standard Test Method for Moisture in Wool by Distillation With Toluene

SIGNIFICANCE AND USE
5.1 Test Method D2462 for testing for moisture in wool is considered satisfactory for acceptance testing of commercial shipments since current estimates of between-laboratory precision are acceptable.  
5.1.1 In case of a dispute arising from differences in reported test results when using Test Method D2462 for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative testing to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of the bias. As a minimum, the two parties should take a group of test specimens that are as homogenous as possible and that are from a lot of the type material in question. The test specimens should be assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using Student's t-Test for unpaired data and an acceptance probability level chosen by the two parties before the test is begun. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results in light of the known bias.  
5.2 This test method is the preferred method for all suitable samples of wool where it is important to obtain a result free from the possible biases, introduced by the conditions discussed in 5.3 and 5.4.  
5.3 This test method is free from the interferences caused by different conditions of ambient atmosphere such as might affect the results of oven-drying. A slight amount of residual moisture may be retained in a specimen subjected to oven-drying because of the relative humidity of the ambient air; however, the amount of moisture retained may be estimated from published data.3  
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SCOPE
1.1 This test method covers the determination of the amount of moisture present in grease wool, scoured wool, carded wool, garnetted wool, wool top and intermediate wool products, and rovings, by distillation with toluene.  
1.2 Equations are given for calculating the amount of water present as moisture content (as-received basis) and moisture regain (dry fiber) basis. The term that corresponds to the basis used in the calculation and report must always be stated.  
1.3 This test method is not applicable to material known to contain any steam-distillable, water-soluble matter. If it is suspected that such matter is present, the method should be used with caution.  
1.4 Xylene or other solvents should not be substituted for toluene as no other solvents have been evaluated for use in this standard.  
Note 1: The determination of moisture in wool by oven-drying is covered in Test Method D1576 and for textile materials in general in Test Methods D2654. A method for sampling wool for the determination of moisture in wool is covered in Practice D2525.  
1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.For specific safety hazard statements, see Section 8.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM D1574-22(Test Method)
Standard Test Method for Extractable Matter in Wool and Other Animal Fibers

SIGNIFICANCE AND USE
5.1 Test Method D1574 is considered satisfactory for acceptance testing since the method has been used extensively in the trade for acceptance testing.  
5.1.1 In case of a dispute arising from differences in reported test results when using Test Method D1574 for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens that are as homogeneous as possible and that are from a lot of material of the type in question. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using Student's t-test for unpaired data and an acceptable probability level chosen by the 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 supplier must agree to interpret future test results in the light of the known bias.  
5.2 This test method may be used to estimate the quantity of oil, grease, and waxy materials remaining on or in wool fibers after scouring, or the quantity of lubricant added before carding or remaining after carding, or the quantity of such materials added or removed in subsequent processing operations.  
5.3 The residues obtained in this test may be subjected to chemical analysis for identification and assay of the component materials, if desired.  
5.4 The specified solvent in this test method does not remove some materials, such as soaps, that may be present in wool and hence in some cases may reflect more closely the added content of some extractables in wool such as oils. When such materials are present and an estimate of their quantity is desired, some other solvent or combination of solvents should be used as spec...
SCOPE
1.1 This test method covers the determination of the amount of extractable matter in samples of all forms of wool, except grease wool, that is extractable with a non-flammable vapor degreasing and cleaning solvent.  
1.2 This test method does not cover the determination of the amounts of different components in the extracted matter nor their identification.  
1.3 This test method is suitable for use with other animal fibers.  
Note 1: The determination of extractable matter in yarns and in felts is covered in Test Methods D2257 and D461. For the determination of alcohol-extractable matter in oven-dry scoured wool, refer to Test Methods D584 and D1334.  
1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.  
1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. See 5.4 and Note 3.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM D2525-22(Practice)
Standard Practice for Sampling Wool for Moisture

SIGNIFICANCE AND USE
5.1 This recommended practice furnishes directions for the sampling of wool of the various forms indicated in Section 1, in order that correct probability statements may be made about the relationship between the sample mean and the population mean. If these statements are to be correct, certain conditions, which are stated, must hold.  
5.2 This recommended practice requires that a deliberate act of randomization be performed so that all potential sampling units have approximately the same chance of being taken and no sampling unit is deprived of its chance of being taken.  
5.3 In any case where insufficient information about the variability of the sampling units within the lot is available, directions are given for calculating confidence limits for the sample mean so that a correct probability statement can still be made.
SCOPE
1.1 This practice covers the design of a sampling plan to be used to obtain samples for the determination of the moisture content of grease wool, scoured wool, carded wool, garnetted wool, wool top and intermediate products, and rovings.  
1.2 Directions are given for the designation of sampling units, calculation of the number of sampling units required to achieve a preselected precision and confidence level or, alternatively, for calculating the confidence limits for the mean based on the variability of the sample tested.  
Note 1: This practice for devising a sampling plan is intended for use in connection with Test Method D1576 or Test Method D2462. The sampling of raw wool for the determination of clean wool fiber present is covered in Practice D1060.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM D6961/D6961M-09(2021)(Test Method)
Standard Test Method for Color Measurement of Flax Fiber

SIGNIFICANCE AND USE
5.1 Few standards exist to objectively judge flax quality. Color is an important factor in the quality of flax fiber. Natural variations in raw flax fiber, various processing steps, fiber blending, and a wide range of end uses contribute to the need for a standard method of objectively measuring the color of flax fiber. Spectrophotometic data provide an accurate, precise determination of the color of flax fiber. Colorimetric data are obtained through specimen measurement by combining specimen spectral data with data representing a CIE standard observer and a CIE standard illuminant, as described in Practice E308.  
5.2 If there are differences of practical significance between reported test results for two (or more) laboratories, comparative tests should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, use the samples for such a comparative test that are as homogeneous as possible, drawn from the same lot of material as the samples that resulted in disparate results during initial testing and randomly assigned in equal numbers to each laboratory. The results from the laboratories involved should be compared using a statistical test for unpaired data, a probability level chosen prior to the testing series. If a bias is found, either its cause must be found and corrected, or future test results for that fiber sample type must be adjusted in consideration of the known bias.
SCOPE
1.1 This test method covers the instrumental color measurement of flax fiber.  
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1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM
ASTM D8394-21(Test Method)
Standard Test Method for Automated Measurement of Maturity, Fineness, Ribbon Width, and Micronaire of Cotton Fibers

SIGNIFICANCE AND USE
5.1 Cotton fiber that is on average finer and more mature is more desirable than coarse or immature fiber, although distinction between these qualities cannot be made quickly and accurately using current test methods. Immature fibers break more easily during processing and have a tendency to form into neps (small entanglements) during processing in the spinning mill. These consequences adversely affect yarn and fabric quality and appearance. Yarn and fabric produced from immature fiber is typically also less lustrous and does not take up dye consistently so yarn and fabric appearance may be different after dyeing.  
5.2 Maturity has a high positive correlation with fiber length and strength but genetic differences and differences in fiber wall thickness caused by plant diseases, soil, and water conditions during the growing season interfere with this relationship.  
5.2.1 Fine fibers are required for fine count yarn manufacture and fiber fineness affects yarn count, evenness and strength. Both fineness and ribbon width are strong genetic traits evident between species and affected by growing conditions within species.  
5.2.2 Micronaire has traditionally been used as a measure of fiber fineness although the value actually measures fiber specific surface area or surface area per unit weight. As a result, micronaire varies concomitantly with both maturity and fineness (see Fig. 2). Maturity and fineness are related to micronaire via Lord’s equation.4
FIG. 2 Relationship Between Micronaire (X), Fineness (H), and Maturity (M)  
5.3 Cottonscope values have been judged against fineness, maturity and ribbon width values produced by examination of thousands of individual, magnified fiber cross-sections. Relationships with equivalent values by these and other older test methods are highly significant5,6 particularly if the number of cross-sections analyzed is high (>3000) and the cross-sections are carefully prepared and measured. Cottonscope measures approximately 20,...
SCOPE
1.1 This test method covers the determination of linear density (gravimetric fineness hereafter stated as fineness), maturity, micronaire, and ribbon width of cotton fibers from a loose, chemically untreated sample taken before harvest, during ginning, during mill processing or unraveled from raw (undyed) yarn or fabric.  
1.2 This test method requires the use of an integrated instrument, for example, the Cottonscope (see Fig. 1), that measures the maturity, fineness, ribbon width, and micronaire of cotton fiber.2
FIG. 1 Cottonscope Instrument
Note 1: For another test method to determine the maturity of cotton fibers, refer to Test Method D1442.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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