ASTM D868-21

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Designation: D868 − 10 (Reapproved 2020) D868 − 21
Standard Practice for
Determination of Degree of Bleeding of Traffic Paint
This standard is issued under the fixed designation D868; 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
1.1 This practice describes test procedures for determining the degree of bleeding of traffic or pavement marking paints. A specific
formulation for a solventborne solvent borne traffic paint formulation is included as a potential bleeding reference control.
1.2 The values stated in SI 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, 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.
2. Referenced Documents
2.1 ASTM Standards:
D226 Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing
D227 Specification for Coal-Tar-Saturated Organic Felt Used in Roofing and Waterproofing
D476 Classification for Dry Pigmentary Titanium Dioxide Products
D867 Specification for Pumice Pigment (Withdrawn 1993)
D1199 Specification for Calcium Carbonate Pigments
D2244 Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
This practice is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.44 on Traffic Coatings.
Current edition approved June 1, 2020Jan. 1, 2021. Published June 2020February 2021. Originally approved in 1946. Last previous edition approved in 20152020 as
D868 – 10 (2015).(2020). DOI: 10.1520/D0868-10R20.10.1520/D0868-21.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
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D868 − 21
E1347 Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 bleeding characteristic, n—that condition of discoloration manifested in traffic paint when applied to tar or asphaltic-type
substrates.
3.1.1.1 Discussion—
The amount of discoloration can be comparing the color of the test coating and a specific reference coating using colorimetric
measurements or by visual comparison to the amount of bleeding in a reference photograph.
4. Significance and Use
4.1 Solvents in a traffic paint may cause bleeding of pavement constituents into the traffic marking, thereby rendering the traffic
marking less effective as a lane or directional indicator. This practice describes how to prepare a panel of the coating to be tested
and a reference panel coated with a specific solventborne solvent borne traffic paint to be used as a control for evaluation.
4.2 This practice can be particularly useful for evaluation of solventborne solvent borne traffic paints, but it may also be used for
other types of traffic markings including waterborne traffic paints.
4.3 Two basic procedures are described for measuring the amount of bleeding. The procedure used shall be agreed upon by the
purchaser and seller.
5. Apparatus
5.1 Film Applicator—A conventional type drawdown gage that casts a film having a minimum width of 50 mm (2 in.) and an
approximate wet thickness of 380 μm (15 mils) (using an applicator clearance of approximately 760 μm (30 mils)).
5.2 Test Panel for Coal-Tar Substrate—A 127 by 254-mm (5 by 10-in.) piece cut from a standard roll of so-called “6.8-kg (15-lb)
coal-tar saturated heat resistant or rag felt.” Unless otherwise specified, use a Specification D227 coal tar saturated felt.
5.3 Test Panel for Asphalt Substrate—A 127 by 254-mm (5 by 10-in.) piece cut from a standard roll of 6.8-kg (15-lb)
asphalt-saturated felt. Unless otherwise specified, use a Specification D226 (Type 1) asphalt saturated felt.
5.4 Paint Composition for Use as a Control—The paint composition shown in Table 1 can be used as a control when applied to
6.8 kg (15 lb) felt. This formulation will show severe bleeding when applied on a coal tar substrate and a somewhat lower degree
of bleeding when applied on the asphalt felt substrate.
6. Preparati
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