ASTM D3050-98
(Guide)Standard Guide for Measuring Soil Removal from Artificially Soiled Fabrics
Standard Guide for Measuring Soil Removal from Artificially Soiled Fabrics
SCOPE
1.1 This is a guide for measuring the ability of detergents to remove artificially applied soils from fabrics. It is intended as a laboratory screening test to aid in the formulation of detergent products, for quality control and as a basis between the purchaser and seller in standardizing specific products' performance.
1.2 The relative ranking of detergent products will vary greatly depending on the type of soiled fabrics used in the test. Therefore, selection of the standard soiled fabric to be used in a test shall be made by agreement between the interested parties on the basis of experience.
1.3 This standard does not purport to address all of the safety problems, 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.
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Designation: D 3050 – 98
Standard Guide for
Measuring Soil Removal from Artificially Soiled Fabrics
(Not Suitable for Detergent Ranking)
This standard is issued under the fixed designation D 3050; 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 correlation of the detergency performance of any particular
soiled cloth or clothes with detergency of naturally soiled
1.1 This is a guide for measuring the ability of detergents to
articles.
remove artificially applied soils from fabrics. It is intended as
4.2 A suggested procedure for comparing the performance
a laboratory screening test to aid in the formulation of
of any two laundry detergents on naturally soiled family items
detergent products, for quality control and as a basis between
in home laundry equipment under controlled conditions on a
the purchaser and seller in standardizing specific products’
paired comparison basis is described in Method D 2960.
performance.
1.2 The relative ranking of detergent products will vary
5. Apparatus
greatly depending on the type of soiled fabrics used in the test.
5.1 Laboratory Washer—A laboratory scale agitator-type
Therefore, selection of the standard soiled fabric to be used in
washing machine.
a test shall be made by agreement between the interested
5.2 Reflectometer, calibrated by means of standard vitreous
parties on the basis of experience.
enamel plaques having reflectances in the range of the fabric or
1.3 This standard does not purport to address all of the
swatch samples being measured.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6. Reagents and Materials
priate safety and health practices and determine the applica-
6.1 Purity of Reagents—Reagent grade chemicals shall be
bility of regulatory limitations prior to use.
used in all tests. Unless otherwise indicated, it is intended that
all reagents shall conform to the specifications of the Commit-
2. Referenced Documents
tee onAnalytical Reagents of theAmerican Chemical Society,
2.1 ASTM Standards:
2 where such specifications are available. Other grades may be
D 1193 Specification for Reagent Water
used, provided it is first ascertained that the reagent is of
D 2960 Test Method of Controlled Laundering Test Using
3 sufficiently high purity to permit its use without lessening the
Naturally Soiled Fabrics and Household Appliances
accuracy of the determination.
E 97 Test Method for Directional Reflectance Factor 45-deg
6.2 Purity of Water—Unless otherwise indicated, references
0-deg of Opaque Specimens by Broad-Band Filter Reflec-
to water shall be understood to mean Type IV reagent water
tometry
conforming to Specification D 1193.
3. Summary of Guide 6.3 Hard Water Stock Solution—Prepare a hard water stock
solution by dissolving 2.940 6 0.002 g of calcium chloride
3.1 Soiled fabric swatches are washed in a laboratory
dihydrate (CaCl ·2H O) and 2.033 6 0.002 g of magnesium
washer using the products being tested and the change in 2 2
chloride hexahydrate (MgCl ·6H O) in about 300 mLof water.
2 2
reflectance is measured.
Dilute to a volume of 1 L with additional water. This solution
4. Significance and Use
contains 3000 ppm hardness (expressed as calcium carbonate)
with a Ca:Mg molar ratio of 2:1. Other ratios may be used.
4.1 Theguide,asnowconstituted,isnotsuitableforranking
of detergent products since no basis is available at this time for
1 5
This guide is under the jurisdiction of ASTM Committee D-12 on Soaps and The Terg-o-tometer, obtainable from the United States Testing Co., 1415 Park
Other Detergents and is the responsibility of Subcommittee D12.15 on Physical Ave., Hoboken, NJ, or its equivalent, has been found satisfactory for this purpose.
Testing. Reagent Chemicals, American Chemical Society Specifications, American
Current edition approved Jan. 10, 1998. Published June 1998. Originally Chemical Society, Washington, DC. For suggestions on the testing of reagents not
published as D 3050 – 72 T. Last previous edition D 3050 – 92 (1997). listed by the American Chemical Society, see Analar Standards for Laboratory
Annual Book of ASTM Standards, Vol 11.01. Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
Annual Book of ASTM Standards, Vol 15.04. and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC)
...
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