Definition: Collodionize is a process used in the printing industry where a print image is created by layering transparent or translucent layers of different colors onto a flat, opaque base. This technique allows for the creation of a three-dimensional image that can be printed on various media such as paper, fabric, and even glass. The result is a highly detailed and lifelike image that can be used in a wide range of applications including advertising, packaging, and fine art.