ASTM D 6441 - 05 Standard Test Methods for Measuring the Hiding Power of Powder Coatings

American Society for Testing and Materials (ASTM). Current edition approved Jan. 1, 2005. Published February 2005. Originally approved in 1999. Last previous edition approved in 1999 as D 6441 – 99a. 8 p. These test methods determine and report the hiding power of a powder coating with respect to two parameters:
1 Test Method A—Contrast Ratio at a given film thickness
2 Test Method B—Film thickness at 0.98 (98 %) contrast ratio.
These test methods cover the determination of the hiding power of powder coatings applied by electrostatic spraying.