Astm | D823

Inadequate thickness may lead to premature failure in salt spray or UV exposure tests.

A precision statement is not fully generic, but for specific coating types (e.g., architectural paints), repeatability (within-lab) is approximately ±5–8% of the nominal thickness, and reproducibility (between labs) ±10–15%. The standard has no bias because it defines only the preparation method, not a pass/fail criterion. astm d823

For a given wet-film applicator gap (G) and coating’s volume solids (VS% as a decimal), the theoretical dry film thickness (DFT) is: Inadequate thickness may lead to premature failure in