Spot color channels not working on placed DCS/EPS and Photoshop files.
Several problems are occurring with placed DCS/EPS in Photoshop files and printing in illustrator:
1) if the custom spot color is named 'black' it will not show as an available spot color. The workaround is to misspell 'black' - example: bLAK
2) if a custom spot color is named 'black' it always results in at least two other custom spot color channels missing. If you misspell 'black', then all of the custom spot color channels will appear and print. Weird.
3) probably due to the battle between Pantone and Adobe, but you cannot have a custom spot color assigned a Pantone color. The workaround is to keep the Pantone name in the custom channel, but to change the color to RGB.
4) the order of the spot channels changes. Example: the last spot channel channel will get moved to be the first one.
Attached is an example. Open a new illustrator file, place this DCS EPS file into it, there are supposed to be six custom spot color channels. The spot color named 'black' is missing. (And it is not a Pantone color palette)
update: the website will not allow me to upload an EPS or zip file
John, yeah, it’s a weird security policy UV has. Please try to rename the .zip archive into a .txt and put it in a comment.