P19.6
Evaporation Rate — Standardized Film Method
Procedure 27 of 40 · Chapter 19 · §19.3.1
1 table 0 notes
Table 1
| Evaporation time (s) | Non-volatile residue (μg/cm²) | Interpretation |
|---|---|---|
| Very rapid dry; may flash-dry, causing non-uniform film | ||
| 15 – 30 | 20 – 50 | Optimal range: rapid drying with minimal residue |
| 30 – 60 | 50 – 100 | Acceptable but slower; may show faint haze under strong light |
| Poor; visible residue likely; reformulate to reduce surfactant or increase solvent |