Abstract: 16 sets of test samples of headlamps and front fog lamps with different materials were tested for atmospheric agent and chemical resistance. The test results showed that, in accordance with the provisions of GB 4599-2007 on atmospheric agent test, 62.5% of 16 sets of test samples can meet the limit value of 0.020 in GB 4599-2007. Therefore, it illustrated that atmospheric agent test highly investigates the performance of plastic lens, which is very difficult for present products to meet its requirements. For the chemical resistance test, the majority of samples can meet the provisions. At the same time, we analyzed the affects of different raw materials to the performances of products, which is very instructive in the material chosen of plastic lens and their coating.

Key words: headlamp, lens, atmospheric agent, chemical agent, test