Help with Multichannel color shift.

Hello Forum

thanks in advance for your advice and help.

I have a project where I am converting images from CMYK to Multichannel in order to swap out the Cyan for a PMS color. As soon as I switch to Multichannel, the image reddens up quite some. I know it has to do with the View Gamut in Photoshop, and that it goes away upon the RIP for printing, but it is hard to work with color accurately whit the added Red. Do you know of any way to remove the color shift?

I am on a Mac Powerbook running OS X 10.7.5 with Adobe CS4