GB/T 12085.11-2022 specifies the methods for conducting mold growth tests on optical and photonic instruments and their components (such as mechanical, chemical, and electronic parts), aiming to evaluate the ability of their materials to inhibit mold growth in hot and humid environments. The standard describes specific testing procedures, including sample preparation, control of test conditions (such as specific temperature and humidity ranges), as well as post-test inspection and result evaluation methods. Performing this test requires the use of specialized mold test chambers (or constant temperature and humidity chambers), which can accurately simulate and maintain the high-temperature and high-humidity test environment, providing standardized conditions for mold growth. This equipment is the core instrument for completing tests in compliance with this standard.