ASTM D2486-00

Standard Test Methods for Scrub Resistance of Wall Paints

SCOPE
1.1 This test method covers a procedure for determining the resistance of wall paints to erosion caused by scrubbing.  
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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.

General Information

• Status: Historical
• Publication Date: 09-Mar-2000
• ICS: 87.040 - Paints and varnishes
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.42 - Architectural Coatings

Relations

• Replaced By: ASTM D2486-06 - Standard Test Methods for Scrub Resistance of Wall Paints
• Effective Date: 01-Apr-2006
• Referred By: ASTM D4213-08(2016) - Standard Test Method for Scrub Resistance of Paints by Abrasion Weight Loss
• Effective Date: 10-Mar-2000
• Referred By: ASTM D6900-10(2020) - Standard Test Method for Wet Adhesion of Latex Paints to a Gloss Alkyd Enamel Substrate
• Effective Date: 10-Mar-2000
• Referred By: ASTM D3730-17(2022) - Standard Guide for Testing High-Performance Interior Architectural Wall Coatings
• Effective Date: 10-Mar-2000
• Referred By: ASTM D5324-16(2022) - Standard Guide for Testing Water-Borne Architectural Coatings
• Effective Date: 10-Mar-2000
• Referred By: ASTM D6763-16(2022) - Standard Guide for Testing Exterior Wood Stains and Clear Water Repellents
• Effective Date: 10-Mar-2000
• Referred By: ASTM F793/F793M-20 - Standard Classification of Wall Coverings by Use Characteristics
• Effective Date: 10-Mar-2000
• Referred By: ASTM D5146-10(2019) - Standard Guide to Testing Solvent-Borne Architectural Coatings
• Effective Date: 10-Mar-2000
• Referred By: ASTM E1795-20a - Standard Specification for Non-Reinforced Liquid Coating Encapsulation Products for Leaded Paint in Buildings
• Effective Date: 10-Mar-2000
• Referred By: ASTM E1797-12(2017)e1 - Standard Specification for Reinforced Liquid Coating Encapsulation Products for Leaded Paint in Buildings
• Effective Date: 10-Mar-2000
• Referred By: ASTM D8424-21 - Standard Guide for Retroreflective Composite Optics Laboratory Procedures
• Effective Date: 10-Mar-2000
• Referred By: ASTM D6736-08(2019) - Standard Test Method for Burnish Resistance of Latex Paints
• Effective Date: 10-Mar-2000
• Referred By: ASTM C744-21 - Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units
• Effective Date: 10-Mar-2000

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D2486–00
Standard Test Methods for
Scrub Resistance of Wall Paints
This standard is issued under the fixed designation D 2486; 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 3.2 InTestMethodB,thetestpaintandareferencepaintare
applied simultaneously perpendicular to the length of the black
1.1 These test methods cover a procedure for determining
plastic panel.After curing, the coated panel is placed over two
the resistance of wall paints to erosion caused by scrubbing,
12.7 by 0.25-mm ( ⁄2-in. by 10-ml) shims that are positioned
referred to herein after as “scrub resistance”.
under each coating. The coatings are then scrubbed with a
1.2 Two test methods are covered as follows:
bristle brush and an abrasive scrub medium until each paint
1.2.1 Test Method A—Cycles-to-failure obtained on test
film is removed in one continuous thin line across its own
paint.
shim.
1.2.2 Test Method B—Ratio expressed as a percentage of
cycles-to-failure obtained on the test paint to that obtained on
4. Significance and Use
a concurrent run with a known reference paint.
4.1 Paints often become soiled especially near doorways,
1.3 The values stated in SI units are to be regarded as the
windows,andinworkandplayareas.Thesetestmethodscover
standard. The values given in parentheses are for information
thedeterminationoftherelativeresistanceofdifferentpaintsto
only.
erosion when repeatedly scrubbed during the life of the paint.
1.4 This standard does not purport to address all of the
4.2 Test Method D 4213 is a similar scrub resistance test
safety concerns, if any, associated with its use. It is the
using a weight-loss technique and reporting volumetric film
responsibility of the user of this standard to establish appro-
erosion rates.
priate safety and health practices and determine the applica-
4.3 Test Method A measures scrub resistance by the tradi-
bility of regulatory limitations prior to use.
tional cycles-to-failure concept. Poor correlation in scrub
2. Referenced Documents testing can be attributable to among other things variations in
the stiffness of the brush bristles, condition of washability
2.1 ASTM Standards:
tester, application and drying conditions. In an attempt to
D 3924 Specification for Standard Environment for Condi-
improve reproducibility, Test Method B has been developed.
tioning and Testing Paint, Varnish, Lacquer, and Related
Materials
5. Apparatus
D 4213 Test Method for Scrub Resistance of Paints by
2 5.1 Straight Line Washability Machine.
Abrasion Weight Loss
5.1.1 Accessory Apparatus: (see Figs. 1 and 2).
3. Summary of Test Method 5.1.1.1 Nylon Bristle Brush and Accessories,(total weight
454 6 10 g).
3.1 In Test Method A, the test paint is applied to a black
5.1.1.2 Drawdown Plate, 454 by 165 by 6.3 mm (17 ⁄8 by
plastic panel. After curing, the coated panel is placed over a
1 1
6 ⁄2 by ⁄4 in.)
12.7 wide by 0.25-mm thick ( ⁄2-in. by 10-mil) shim and held
5.1.1.3 Brass Shims, 12.7- by 0.25-mm ( ⁄2-in. by 10-mils).
in place on a drawdown plate in a washability machine by
Its length can be fitted to the width of the drawdown plate.
means of a gasketed frame. The coated panel is then scrubbed
5.2 Film Applicator, having 0.18-mm (7-mil) clearance and
with a bristle brush and an abrasive scrub medium until the
1 1
6.25-mm ( ⁄4-in.) edge and width of 135 mm (5 ⁄4-in.).
paint film is removed in one continuous thin line across the
shim.
6. Reagents and Materials
6.1 Purity of Reagents—Reagent grade chemicals shall be
used in all tests.
ThesetestmethodsareunderthejurisdictionofASTMCommitteeD-1onPaint
3,4
and Related Coatings, Materials, andApplications and is the direct responsibility of
6.2 Black Plastic Panels.
,
Subcommittee D01.42 on Architectural Coatings. 4 5
6.3 Abrasive Scrub Medium.
Current edition approved March 10, 2000. Published May 2000. Originally
6.3.1 Laboratory standardized abrasive scrub medium con-
published as D 2486 – 66 T. Last previous edition D 2486 – 96.
Annual Book of ASTM Standards, Vol 06.02. sisting of the following:
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D2486
FIG. 2 Accessory Apparatus for Scrub Test
6.4 Reference paint when using Test Method B.
FIG. 1 Accessory Apparatus for Scrub Test
7. Preparation of Apparatus
7.1 Washability Machine—The straight line washability
grams
machine should be leveled before use and operated at 37 6 1
A
Water, distilled or deionized 49.4
4,6
Hydroxyethyl cellulose 0.8 cycles per minute.
Ammonium hydroxide, 28 % 0.1
7.2 Brush—Replace the brush when the bristles have be-
4,7
Detergent 2.0
come worn to a point that the bristles extend less than 15 mm
Trisodium phosphate, anhydrous 2.0
4,8 5
Silica 45.0 ( ⁄8 in.) from the block. Mark the ends of the brush to ensure it
B
Acetic acid (glacial) 0.7
is oriented in the same direction for each use.
4,9
Preservative 0.1
7.2.1 Brushes(thatareinfrequentuse)—Brushes that are in
_______________
A frequent use shall be stored in water. Each time before starting
Adjust to achieve viscosity of 110 to 120 Krebs units before use.
B
the first test of the day, remove the brush and rinse in water,
Vary to achieve a pH of 9.5 to 10.
then precondition the brush, by running it for 400 cycles on a
scrub panel, after which it is ready for test work.
Dull black plastic panels, P-121-10N, 165 by 432 by 0.25 mm (6 ⁄2 by 17 in. 7.2.2 Brushes (that are not in regular use)—Brushes that
by 10 mils) manufactured by the Leneta Co., 15 Whitney Rd., Mahwah, NJ 07430
will not be used on a regular basis shall be washed out
were used in the original development of this standard in order to get the results in
thoroughly in water after their last use and stored with the
these test methods.
bristling side up under ambient conditions. Before being used
If you are aware of alternative suppliers, please provide this information to
ASTMHeadquarters.Yourcommentswillreceivecarefulconsiderationatameeting
again, the brush should be soaked in water for at least 24 h.
of the responsible technical committee, which you may attend.
Precondition the brush as directed in 7.2.1 before starting the
The sole source of supply of the abrasive scrub medium known to the
test work.
committee at this time is the Leneta Company.
The sole source of supply of cello size OP-4400, viscosity grade of HEC, 7.3 Brush Holder—For washability testers that include a
known to the committee at this time is Union Carbide, Polymer Division, 318-24 1
separate brush holder, insert a 3.2-mm ( ⁄8-in.) thick rubber mat
Fourth Ave., So. Charleston, WV 25303.
The sole source of supply of the Triton X-100 detergent known to the
committee at this time is Union Carbide, 10235 W. Little York Road, Suite 300,
Houston, TX 77040. Thesolesourceofsupplyofthe1.3.5-triethylhexahydro-sym-triazine(Vancide
The sole source of supply of theTamsil 45, known to the committee at this time TH), known to the committee at this time is R
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