Water transfer imaging, or water transfer printing, is the process of applying decorative finished to 3D products. Any hard surface, non-porous and that can be submersed in water can be decorated. Another good rule of thumb is if you can get paint to stick to the object most likely you can decorate it with this process. Examples of such materials are: plastic, glass, hardwoods, fiberglass, ceramics, and metal.
Products are decorated using a print, which resides on a thin base of water-soluble film. The printed film is placed on the surface of the water, and the base begins to dissolve. A patented activator chemical is sprayed over the film causing the ink to remain floating in an oil-like state on top of the water. Next the properly prepared part is immersed into the water, and the upward pressure of the water causes the ink to wrap around and adhere to the item. After the entire item has been immersed, it is removed from the water, cleaned and then coated with a clear coat. Included in the kit is a link to a set of video instructions that walk you through all the steps in the process.