Sealed Charts and
Coatings TestsUnsealed Charts
for Coatings TestsSpecial Substrates for
Coatings TestsPaper-Testing Ink
& Printing Ink Test SheetsSag and Leveling
Test Charts & ApplicatorsMetal Panels for
Bakeable CoatingsFilm Applicators
and AccessoriesScrub Resistance
Test Panel and
E. Practical Interpretation of Ratings
This is empirical and strongly subjective. It should be emphasized that the Anti-Sag Index is not a wet film thickness; it is the clearance of the index groove expressed in mils, and as such, approximately twice the wet film thickness of the index stripe with emphasis on approximate. Neither the Anti-Sag Index nor the estimated corresponding wet film thickness is to be construed as calling for a specific thickness in practice. It is solely a numerical comparator and acquires practical significance only on the basis of experience. When a coating is perceived as having optimum sag resistance by actual application, the Anti- Sag Index is then measured and thereafter becomes the sag control value for that particular formulation.
The correct Anti-Sag Index for one product might be quite different than for another. Latex paints, for example, would normally have much higher index values than solvent borne coatings. The following qualitative judgments were based on observations of a series of trade sales type alkyd gloss enamels, and are given here as examples only. They are not to be considered as definitive.
The above indices cover the range of the Standard Anti-Sag Meter, but many coatings require lower or higher index measurements. These requirements are met with Low, Medium, and High Range instruments, making it possible to measure Anti- Sag Index values from 1 to 60.