Dye Ingress Methods
| Test Method | USP/EP | This Study |
|---|---|---|
| Dye solution | 1 g/L methylene blue solution | 1g/L brilliant blue solution |
| Pressure condition | −27 kPa | +200 kPa |
| Time at pressure | 10 min | 30 min |
| Time at atmospheric pressure | 30 min | 30 min |
| Dye verification method | Visual | Visual |