What are the common UV absorbers? Explain how it works

currently the more ideal uv absorbers/light stabilizers are mostly compound types. in particular, the combination of salicylates, benzophenones, benzotriazoles, substituted acrylonitriles, triazines and hindered amines can achieve a more rational effect than any single uv absorber. application fields of uv absorbers: polymers (plastics, etc.), coatings (car spray paint, building decoration), printing inks, post-processing of dyed/printed…