We automatically convert Pantone colours to their CMYK equivalent values for printing. Pantone colors are created by mixing ink precisely to match using a proprietary mixing system. As a result, Pantone colours can be difficult to replicate using a CMYK printer and upon conversion the color may not be 100% accurate. Here you can see some variations of a Pantone colour converted to CMYK.
If you'd like to specify your own CMYK values, please include that in your artwork instructions when ordering.