The JASO M346-1993 standard provides a test method for xenon arc lamp irradiation of automotive interior parts to evaluate the light aging performance of interior materials. The standard uses xenon arc lamps to simulate sunlight exposure and test the color and Gloss changes of materials under light conditions to ensure the durability and aesthetics of interior parts in long-term use. This test method helps to verify the performance Stability of interior materials under various environment conditions.