Formerly under the jurisdiction of Committee D20 on Plastics, this specification was withdrawn in May 2018 and replaced by Specification D7856 for Color and Appearance Retention of Solid and Variegated Color Plastic Siding Products using CIELab Color Space.1

This specification focuses on the requirements and test methods for the color and appearance retention of solid colored plastic siding products. Color retention testing provides a method for estimating the acceptability of color change in a siding product over a period of years of service. Calculation of ellipsoid values for indicating compliance with this specification are provided.

1.1 This specification establishes requirements and test methods for the color and appearance retention of solid colored plastic siding products.

1.2 Color retention testing provides a method for estimating the acceptability of color change in a siding product over a period of years of service.

1.3 Methods of indicating compliance with this specification are provided.

Note 1—There is no known ISO equivalent to this standard.