Research Report RR:D01-1040
Two interlaboratory (round-robin) tests have been conducted to determine the precision, sensitivity, and correlation of two proposed methods for using a multi-notch applicator to measure the sag resistance of paints. Brush outs were included in these tests as a basis of comparison. In the first round-robin test (conducted in 1981), seven laboratories test six water based and four solvent based paints for sag resistance by brush out, by horizontal stripe test, and by vertical stripe test. Single rating values were reported for each test by each laboratory providing a means for establishing the between-laboratories precision of each test. In the second round-robin test (conducted in 1982), five laboratories used the horizontal stripe method to test one water based paint and two solvent based paints. The same five laboratories also used the vertical stripe method to test two water based paints and one solvent based paint. Each laboratory performed three runs of each test on each paint, providing a means for establishing the within-laboratories precision of each test.
D4400-99(2012)e1 Standard Test Method for Sag Resistance of Paints Using a Multinotch Applicator
Committee D01 on Paint and Related Coatings, Materials, and Applications
Subcommittee D01.42 on Architectural Coatings