| Description | Test standard | Polyester |
| Thickness of coating | Polyester paint ≥16um | 16um to 18um |
| Coating flexibility (T-bend) | Polyester paint≥3T | 3T |
| Color different | ΔE≤2.0(follow color sample) | ΔE≤2.0 |
| Pencil hardness | ≥HB | ≥2H |
| Chemical resistance | 2%HCI or 2%NaOH test in 24 hours -No change | No change |
| Coating adhesion | ≥1grade for 10810mm2gridding test | 1grade |
| Resist solvent | 100times with Dimethylebnzene without change | No change |
| Boiling water resistance | 2 hours without change | No change |
Peeling strength/ stripping strength | Average ≥5N/mm of 180oc peel off for panel with 0.21mm alu.skin | 5N/mm |
| Impact test for paint | 20KG.cm impact-paint no split for panel | No split |
| Abrasion resistance (L/Mil) | NIL | NIL |
| Temperature resistance | -40℃ to +80℃ temperature without change of color difference andpaint peel off, peeling strength average dropprate≤10% | Change of glossy only,no paint |
| Peel off |
Cofficient of linear Thermal Expansion | 100℃ temperature difference | 2.4mm/n |
| Detergent resistance (3%) | ASTM D2248 | No change |
Humidity Resistance (3000hrs,100%RH,100°F) | ASTM D2247 | No change |
Salt spray resistance (3000hrs,5% salt) | ASTM B117 | No change |
| Resistance to Staining | 600h radiate in 800W/M2 in humidity condition ,glossiness deviation less grade 2,color difference ≤4.0 | No change |