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| Item | Index | Test mode |
| Paint film color and appearance | Meet the standard template and its color difference range, smooth and smooth. | Visual inspection |
| Gloss (60°) | 30~60 | GB/T1743-79（89） |
| Fineness(um) | ≤40 | GB/T1724-79（89） |
| Drying time | ≤1≤24 | GB/T1728-79（89） |
| Hardness (pencil) | ≥HB | GB/T6739-1996 |
| Impact(kg*cm) | 50 | GB/T1732-1993 |
| Pliability(mm) | ≤1 | GB/T1731-1993 |
| Adhesive force | ≤1 | GB/T1720-79（89） |
| Water resistance 168h | Does not bubble, does not fall off, allows the color to be slightly lightened | GB/T1733-1993 |
| Salt water resistance 5%NaCl (500h) | No foaming, no rust, allow slight discoloration and loss of light | GB/T1763-79（89） |
| Salt spray resistance（120h） | No foaming, no rust, no shedding | GB/T1771-1991 |
