ASTM D3050-07(2024)

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: D3050 − 07 (Reapproved 2024)
Standard Guide for
Measuring Soil Removal from Artificially Soiled Fabrics (Not
Suitable for Detergent Ranking)
This standard is issued under the fixed designation D3050; 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. Summary of Guide
1.1 This is a guide for measuring the ability of detergents to 3.1 Soiled fabric swatches are washed in a laboratory
remove artificially applied soils from fabrics. It is intended as washer using the products being tested and the change in
a laboratory screening test to aid in the formulation of reflectance is measured.
detergent products, for quality control and as a basis between
the purchaser and seller in standardizing specific products’
4. Significance and Use
performance.
4.1 The guide, as now constituted, is not suitable for ranking
1.2 The relative ranking of detergent products will vary of detergent products since no basis is available at this time for
greatly depending on the type of soiled fabrics used in the test. correlation of the detergency performance of any particular
Therefore, selection of the standard soiled fabric to be used in soiled cloth or clothes with detergency of naturally soiled
a test shall be made by agreement between the interested articles.
parties on the basis of experience.
4.2 A suggested procedure for comparing the performance
1.3 This standard does not purport to address all of the
of any two laundry detergents on naturally soiled family items
safety concerns, if any, associated with its use. It is the
in home laundry equipment under controlled conditions on a
responsibility of the user of this standard to establish appro-
paired comparison basis is described in Method D2960.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
5. Apparatus
1.4 This international standard was developed in accor-
5.1 Laboratory Washer—A laboratory scale agitator-type
dance with internationally recognized principles on standard-
washing machine.
ization established in the Decision on Principles for the
5.2 Reflectometer, calibrated by means of standard vitreous
Development of International Standards, Guides and Recom-
enamel plaques having reflectances in the range of the fabric or
mendations issued by the World Trade Organization Technical
swatch samples being measured.
Barriers to Trade (TBT) Committee.
6. Reagents and Materials
2. Referenced Documents
6.1 Purity of Reagents—Reagent grade chemicals shall be
2.1 ASTM Standards:
used in all tests. Unless otherwise indicated, it is intended that
D1193 Specification for Reagent Water
all reagents shall conform to the specifications of the Commit-
D2960 Guide for Controlled Laundering Test Using Natu-
tee on Analytical Reagents of the American Chemical Society,
rally Soiled Fabrics and Household Appliances (With-
where such specifications are available. Other grades may be
drawn 2013)
used, provided it is first ascertained that the reagent is of
sufficiently high purity to permit its use without lessening the
1 accuracy of the determination.
This guide is under the jurisdiction of ASTM Committee D12 on Soaps and
Other Detergents and is the responsibility of Subcommittee D12.15 on Physical
Testing.
Current edition approved Jan. 1, 2024. Published January 2024. Originally
approved in 1972. Last previous edition approved in 2015 as D3050 – 07 (2015). The Terg-o-tometer, obtainable from the United States Testing Co., 1415 Park
DOI: 10.1520/D3050-07R24. Ave., Hoboken, NJ, or its equivalent, has been found satisfactory for this purpose.
2 5
For referenced ASTM standards, visit the ASTM website, www.astm.org, or ACS Reagent Chemicals, Specifications and Procedures for Reagents and
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standard-Grade Reference Materials, American Chemical Society, Washington,
Standards volume information, refer to the standard’s Document Summary page on DC. For suggestions on the testing of reagents not listed by the American Chemical
the ASTM website. Society, see Analar Standards for Laboratory Chemicals, BDH Ltd., Poole, Dorset,
The last approved version of this historical standard is referenced on U.K., and the United States Pharmacopeia and National Formulary, U.S. Pharma-
www.astm.org. copeial Convention, Inc. (USPC), Rockville, MD.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D3050 − 07 (2024)
therefore a hardness of 75 ppm may be more realistic for the lower
6.2 Purity of Water—Unless otherwise indicated, references
hardness level.
to water shall be understood to mean Type IV reagent water
NOTE 3—To avoid discoloration or change, or both, in the structure of
conforming to Specifica
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