As the name suggests, its properties are greatly influenced by light. Specifically, UV light causes its properties to evolve greatly. The photopolymer will be in a liquid state. On exposure to UV light, it hardens almost instantaneously. Most of us may assume that this is a new concept. Well, this is not the case. The materials have been around for quite a while now. The materials are often used to cover wood, paper, and some metals. It tends to increase their durability. In addition, quite many adhesives and inks are based on the photopolymers. Dentists often use them. If you have ever heard a cracked tooth bonded, the doctor used a photopolymer.