UV inks cure almost instantly under ultraviolet light, creating a durable printed layer on materials such as glass, metal, acrylic and plastic. Selecting the correct ink is essential because the finished result depends on the balance between hardness, flexibility, adhesion and scratch resistance.

Rigid inks favor hard, flat surfaces and crisp detail. Flexible inks better accommodate materials that bend or deform, while neutral formulations balance both characteristics for broader use. Substrate testing and the correct pretreatment remain important even when an ink is marketed for a particular material.