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  • ASTM
    D584-10 Standard Test Method for Wool Content of Raw Wool-Laboratory Scale (Redline)
    Edition: 2010
    $68.89
    Unlimited Users per year

Description of ASTM-D584 2010

ASTM D584 - 10

Standard Test Method for Wool Content of Raw Wool-Laboratory Scale

Active Standard ASTM D584 | Developed by Subcommittee: D13.13

Book of Standards Volume: 07.01




ASTM D584

Significance and Use

This test method is considered satisfactory for acceptance testing of commercial shipments since this test method has been used extensively in the trade for acceptance testing.

In case of dispute arising from differences in reported test results when using Test Method D584 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 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 then 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 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 known bias.

The wool-base content of wool in any condition or form is a basic quantity. From it may be calculated commercial masses or yields in any of the various recognized defined systems used in international commerce (Note 1).

The procedures for determining the wool base content of greasy wool provided in this test method and in IWTO Method 19-85(E) are in essential agreement.

Note 3This is not true for scoured wool, as IWTO Method 19-85(E) does not require rescouring of scoured wool containing less than 5% residual grease.

Not all of the wool base present in a lot of raw wool can be recovered in useful form by commercial cleaning operations. The amount of wool loss varies, depending on factors such as the character of the wool, the nature and percentage of the impurities present, the cleaning process and equipment used, and so forth.

No ASTM standard specifies or recommends any specific procedure or practice for estimating anticipated loss of wool during commercial cleaning (or other) operations. The following statutory practice is described solely for information:

For the purpose of duty assessment on importations of raw wool into the United States, the Tariff Schedules of the United States provides a statutory formula for calculating the allowance to be made for wool that would ordinarily be lost during commercial cleaning operations. The formula is based on the clean wool fiber present (called absolute clean content in the Tariff Schedules) and on the vegetable matter present. The allowance, in terms of clean wool fiber present, is equal to 0.5 % of the clean wool fiber present plus 60 % of the vegetable matter present, the total allowance not to exceed 15 % of the clean wool fiber present. The dutiable quantity (called clean yield in the Tariff Schedules) is the difference between the clean wool fiber present and the allowance so calculated.

1. Scope

1.1 This test method covers a laboratory procedure for the determination of the wool base content and the clean wool fiber present in samples of raw wool. This test method is also applicable to other animal fibers such as mohair, cashmere, alpaca, and camel hair.

Note 1Sampling of lots of raw wool in packages is covered in Practice D1060 ; the determination of vegetable matter and other alkali-insoluble impurities in scoured wool is covered in Test Method D1113 ; the determination of wool content on a commercial scale is covered in Test Method D1334 . For factors for the conversion of woolbase content to its equivalent in terms of scoured wool, top, or noil of various commercially specified compositions (formerly covered in the appendix of this test method), refer to Practice D2720 .

Note 2Because of the trade practice the term weight is used in this test method instead of the technically correct term mass.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 and health practices and determine the applicability of regulatory limitations prior to use.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D123 Terminology Relating to Textiles

D584 Test Method for Wool Content of Raw Wool--Laboratory Scale

D1060 Practice for Core Sampling of Raw Wool in Packages for Determination of Percentage of Clean Wool Fiber Present

D1113 Test Method for Vegetable Matter and Other Alkali-Insoluble Impurities in Scoured Wool

D1334 Test Method for Wool Content of Raw Wool--Commercial Scale

D2525 Practice for Sampling Wool for Moisture

D2720 Practice for Calculation of Commercial Weight and Yield of Scoured Wool, Top, and Noil for Various Commercial Compositions

D4845 Terminology Relating to Wool

E337 Test Method for Measuring Humidity with a Psychrometer (the Measurement of Wet- and Dry-Bulb Temperatures)

Other Standard

IWTO-19-85 (E) Method for the Determination of Wool Base, Vegetable Matter Base; IWTO Clean Wool Content; IWTO Scoured Yield in Raw Wool Specifications of Test Methods, International Wool Textile Organization, International Wool Secretariat, Ilkley, West Yorkshire, U.K. LS298PB.

Keywords

clean wool content; raw wool; yield; Clean fiber content; Extractable matter content--textile fabrics/fibers; Wool and wool top; Wool and wool top--raw; Wool content--raw wool;


ICS Code

ICS Number Code 59.060.10 (Natural fibres)


DOI: 10.1520/D0584-10

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ASTM D584

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ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.

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