👉 In the context of chemistry, "chromogenic" refers to a substance that reacts with certain pigments on the surface of an object or material. This reaction is called photopolymerization and can lead to the formation of a color pattern on the surface of the material. The presence of this pigment in a material causes it to become more visible under UV light, which can be used for various applications such as printing, painting, and other forms of decorative arts.