The cmyk numbers from Pantone ColorBridge are not simulating any "standard profiles" found with Adobe applications. I've made several test since few years, and never found a cmyk profile close to what Pantone makes thos cmyk values accurate. You are better to use Pantone colormanager to convert Pantone solids to your KNOWN cmyk color sapce. Louis Dery Color911.com Transmis via mon iPad
On 2015-03-31, at 15:12, colorsync-users-request@lists.apple.com wrote:
Mark,
There isn't a "right" RGB or CMYK. The RGB and CMYK equivalents are going to depend on which RGB and which CMYK, and to compound things, my understanding is that while the RGB numbers in the bridge book relate to sRGB, the CMYK numbers are some CMYK space Pantone created and has never released, so they don't relate completely to any commonly used CMYK space. (Although from playing with it over the years, the space seems fairly close to SWOP to me.)
Keep in mind though that there are plenty of Pantone colors that are out of the gamut of sRGB, so not all the RGB numbers, even using sRGB, are going to be equivalents to the L*a*b* value of all colors.
Best quick way to get the L*a*b* value of any PMS is just to select color books in the picker, the pick that color. It'll give you the value right there.
Mike Adams Correct Color