Table 5.
The pencil hardness of all the coatings.
| Specimens | Scratch | Gauge |
|---|---|---|
| Epoxy | 6H | 4H |
| Epoxy-CaCO3 | 6H | 4H |
| Epoxy-3 wt%SLS/CaCO3 | 6H | 4H |
| Epoxy-5 wt%SLS/CaCO3 | 6H | 4H |
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