Printing the images from a flat plate to a rubber blanket surface and then transferring the image to the paper. The original artwork is separated using graphic software programs into the basic colors of cyan, magenta, yellow, and black. These systems are calibrated to provide consistency when viewing an Epson proof and the final press printed sheet of paper. The press should maintain consistency of the ink density of each color using a densitometer or spectrophotometer that will measure each color as it is applied to the paper.
Special coatings can be applied over the inks to increase the gloss or matte appearance. All offset inks are transparent and the color of the paper it is printed on will change the color of the final image you view. Typical presses will have 5 or 6 colors and a special coating station.
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