When placing a .psd file with a spot channel into illustrator, and then later copying this and pasting back into Photoshop the color shifts.
Original Photoshop spot color channel (0/100/81/16)
Color after pasting back into Photoshop (13/99/88/4)
We are making renders of packaging, so the designs are from illustrator. We correct this by removing the Photoshop spot channel and recreating this as a CMYK layer, but looking to avoid this step as we do many many renders. Even with assign color profile set to none this happens.
Viewing Photoshop channels you can see a difference in values between the linked image and illustrator flat tint.
That looks like it got converted to RGB and back.
That could be because of the document modes (in both applications), or it could be a problem in Illustrator.
But spot channels aren't CMYK anyway - they typically should have LAB reference values (for real spot colors).
Thanks for your reply. The document color modes are cmyk in both apps.
I heard photoshop spot colors convert to LAB in the past, but when exporting Illustrator to a .psd, the spot color holds to the correct 0/100/81/16 value. Every PSD spot color shifts some, but that one shifts the most.
Everyone here (CS5 Mac) is getting the exact same results, but wondering what other people may experience using the values I provided.