After being irradiated by ultraviolet light, the photoinitiator 369 absorbs the energy of the light and splits into 2 active free radicals, triggering the interlocking polymerization of the photosensitive resin and the active diluent, so that the adhesive crosslinks and cures. It is characterized by being fast, environmentally friendly, and energy-saving. It plays a decisive role in the sensitivity of the light-curing system. Since the light-curing material volatilizes without solvent during curing, the pollution to the environment is greatly reduced.