UV Printing — Horse of a Different Color

To avoid these problems, practitioners suggest acquiring a press that is capable of putting all of the colors down at once. And that's not all. Undercure a job, and it won't dry properly. Overcure it, and the substrate becomes brittle. Some plastic substrates can become discolored when exposed to excessive heat. If the surface tension of a plastic substrate is lower than the surface tension of the ink, the ink won't stick.