I'm using Illustrator CS5 / Mac OS 10.6.8
Ihave a customer supplied file that has several placed grayscale .tif images in it. The images are colored with a spot PMS color. We are going to run the job CMYK. So I go into my swatches palette, select the spot color, and change it from Book Color to CMYK, and then from Spot Color to Process Color. When I do, the image turns black. If you click on it it still has the correct color applied to it. It's just black instead of the color it's supposed to be.
I've tried just clicking on the image, going to the color palette and converting it to CMYK there. Same result. I've tried changing it to a different color. It still stays black but when you click on it it says it's whatever color it's supposed to be.
I've also tried converting the color to LAB and RGB just to see if that made any difference. The grayscale still turns black.
Tried printing it, figuring it's just a weird display issue, but it prints black as well.
This only effects grayscale images. If I create a vector shape of the PMS color and then change the color to CMYK it works as it should.
I'm stumped. Never seen this before. Anyone have any ideas?