The Pantone Matching System is used by document creators and printers to select, specify, match and control ink colors. The Pantone Matching System formula guide is a book of printing ink formulas and samples printed on coated, uncoated and matte coated stock in a fan format.
Whereas the primary process printing colors of cyan, magenta and yellow are combined via overprinting to produce a specific color, a PMS or spot color ink is one single hue. In addition, the inks used for spot color are opaque rather than translucent and so do not allow white light to pass through nor absorb any part of the white light spectrum.
For its PMS colors, Pantone provides a formula of what percentages of cyan, magenta, yellow and black ink to use to simulate the single hue of a PMS color. While in general these translations work well, there are times when the CMYK equivalent of a PMS color will not be a perfect match.
When it is important in your full color document for the PMS color to be true, it may be necessary to print in the four process colors, and then use the actual PMS color as a fifth ink. To discuss the implications in cost and time, please call us at (408) 400-0223.
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