Meaning and Purpose
4.1 Solvents in traffic paints may cause road surface components to penetrate into traffic markings, thus making traffic markings less effective as lane or direction indicators. This procedure describes how to prepare a panel for the coating under test and a reference panel coated with a specific solvent based traffic coating to be used as a control for the evaluation.

4.2 This practice is particularly useful for evaluating solvent-based traffic paints, but can also be used for other types of traffic signs, including waterpass paints.

4.3 describes two basic procedures for measuring the amount of bleeding. The procedure to be used shall be agreed upon by the buyer and the seller.

ASTM D 868-2021 “Evaluation of the Degree of Penetration of Road Sign Paint”

Scope of
1.1 This specification describes the test procedures used to determine the degree of seepage of traffic or road marking paint. Specific formulations of solvent-based traffic paint formulations are included as potential bleeding reference controls.

1.2 Values expressed in SI units shall be regarded as standards. The values given in parentheses are for reference only.

1.3 This standard is not intended to address all safety issues, 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 to determine the applicability of regulatory restrictions prior to use.

1.4 This international Standard has been developed in accordance with the internationally recognized standardization principles established in the Decision on Principles for the Development of International Standards, Guidelines and Recommendations issued by the Committee on Technical Barriers to Trade of the World Trade Organization.