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ISO requirements for clinical grade glass-ionomer cements.
| Property | Luting Cement | Restorative Cement |
|---|---|---|
| Setting time/min | 2.5–8 | 2–6 |
| Compressive strength/MPa | 70 (minimum) | 100 (minimum) |
| Acid erosion (maximum)/mm h−1 | – | 0.05 |
| Opacity, C0.70 | – | 0.35–0.90 |
| Acid-soluble As/mg kg−1 | 2 | 2 |
| Acid-soluble Pb/mg kg−1 | 100 | 100 |
