If specified wrong the printing could be sideways or upside down on your product. Although you use the same ink to print on either of these stocks, visually the difference will be dramatic.
Uncoated stock has a tendency to absorb the ink and has a flatter or more matte finish.
Coated stock, as the name implies, is either a clay coated or cast coated stock, thereby giving the stock a smoother finish with less ink absorption. An eyemark is customarily a small rectangular printed area usually located near the edge of the web or incorporated into the design itself. The purpose of the eyemark is to activate an electronic automatic position regulator for controlling register with subsequent equipment or operations i.e. automatic applicators or off line hot stamping. Information Request MPI Label Systems of California. All rights reserved.