Meaning and Purpose
4.1 Indoor architectural coatings can be stained with dirt or other stains during use. The test method provides a way to assess the relative ease of soil or stain removal on paint films using household generic materials. The test method includes a method to evaluate the washability and appearance changes of the film. Therefore, the formulation designer can evaluate the influence of the composition on the wash resistance of the paint. Users can also compare how easily the different paints tested remove dirt, which is recommended to be done simultaneously.

ASTM D4828-2020 Practical Washability of Organic Coatings

Scope of
1.1 These test methods include determining the relative ease of removing common dirt and stains from internal coatings by manual or mechanical washing with sponges and liquid or powder cleaners.

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

ASTM D4828-2020 Practical Washability of Organic Coatings

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.