| Methods | 1 | 2 | 3 | 4 |
| Name | Carbon steel sheet (substrate) | Epoxy resin | ER + glass fiber cloth | ER + 4 hours interval + GFC |
| Features | Q215A | V-470 | δ = 0.25 mm 220 g∙cm−2 | δ = 0.25 mm 220 g∙cm−2 |
| Code | CSS | ER | GFCI | GFCII |