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Compressive strength of glass-ionomer (Chelon-Fil, ESPE, Germany), mixed at 1.3:1 powder:liquid ratio and stored in vegetable oil (Standard deviations in parentheses).
| Storage time | Compressive strength/MPa |
|---|---|
| 24 h | 188.8 (15.2) |
| 1 week | 199.4 (12.0) |
| 1 month | 181.5 (15.3) |
| 2 months | 154.4 (16.2) |
| 3 months | 159.8 (12.3) |
| 4 months | 124.5 (20.3) |
