The filename extension of these color books is. CMYK values were whole numbers. Pantone color books, introduced in CS2, use Lab values as the color definitions. The equivalent CMYK values aren't always whole numbers. Define spot colors using Lab values In Adobe Illustrator, you add named color swatches, such as manufacturer-supplied spot colors, to the document swatches. Therefore, to add Pantone Plus spot colors to your document swatches, define spot colors using Lab values.
And because the spot colors use Lab values, the visible results are much closer to the real inks available. Using Lab values for spot colors also reduces the difference of appearance between the Normal and Overprint Preview viewing modes.
CMYK, as a color mode, has a fairly limited gamut. Representing Pantone spot colors in CMYK values results in a wider difference of appearance between printed output and digital artwork. Copy all Pantone libraries with extension.
Relaunch Illustrator, and open all the document profiles from: Save and close all document profiles, then restart Illustrator again. Make older Pantone libraries available for missing colors Use this workaround only if you encounter missing colors in legacy documents opened in Illustrator CS6 or CC. It is not recommended to use older Pantone libraries to add new colors to a document. FAQs Has the process changed for adding new spot colors from color books to a document?
There is no change in this process. To add a spot color to a document, open the color book and click the desired swatch. In Illustrator CS5 and earlier versions, which included the older versions of the Pantone color books, most spot colors from Pantone had two definitions: CMYK values took priority over Lab values.
The spot color added to the document usually came with CMYK values. Replace Pantone Plus with older Pantone color books. This workaround makes the Pantone spot color uniform across different versions of Illustrator.
Files from earlier versions open successfully. Spot color definitions are preserved along with their original definitions. When you place-link such files in an Illustrator CS6 or CC document, the system searches for the color information for spot channels in the installed Pantone Plus color books. If an identically named color is found in any of the available spot color books, the system fetches it and links to the file or opens the legacy file. During this process, there can be a slight difference in how the color appears compared to Illustrator CS5 or earlier.
There are two possible reasons for the difference of appearance: Pantone may have changed the definition of the color in Pantone Plus. If the color used in spot channels isn't found, Illustrator displays a warning and places the file with the spot color turning black.
However, it retains the color as a spot color Illustrator converts the color to a default black spot for the swatch values instead of coverting it to a process color.