Coating film hardness: The coating film hardness on the outer surface of the cream bottle shall not be less than 2H pencil hardness. Adhesion: The adhesion of the coating film is not less than level 1. The surface decoration pattern is complete and clear. High and low temperature resistance: 40℃, it should not leak, deform, or crack, the coating film and surface decoration pattern should have no cracks, and no obvious discoloration;
——18℃, it should not leak, deform, or crack, the coating film, surface decoration should not leak, deform, or crack The pattern has no cracks or obvious discoloration. Opening torque: opening torque (0.8~3.2)N·m. Sealing performance: After sealing test, no liquid leakage occurs. Drop test: After the drop test, there is no leakage, no impact on use or rupture.