ISO 6530
Measures liquid run-off and penetration as percentages.
Minimum repellency: Class 3 for at least one specified chemical. Minimum penetration: Class 2 for at least one specified chemical.
| Class | Repellency index | Penetration index |
|---|---|---|
| 1 | > 80% | < 10% |
| 2 | > 90% | < 5% |
| 3 | > 95% | < 1% |












