I produce artwork for offset printing. I have a series of CMYK packages that have been running in China, printed by various manufacturers. For better color consistency, my client has decided to change the background color from CMYK to a spot color.
My concern is a logo device that appears on all of the packages - it has a "white" raster glow effect applied to the outside, that will now have to blend into the spot color background. How can I assure this will image correctly, even when working with plants that may not have the latest RIPs? Most of the plants accept .pdf now, but a few insist on .ai (I export to .eps for those, then save as .ai) or application files.
App used is ID CS5. The raster effect used is "outer glow".
Any hints or opinions will be greatly appreciated.
That's a tricky problem. Because when you have the interactiion of spot color background and transparency effects, overprinting must be turned on when the file is RIPed. Without overprinting turned on, you're likely to get the "white box effect"
Since you'll have no control over the RIPs of the Chinese printers you're using, you should bring this up with the client, and convince them to switch to CMYK instead.
My suggestion for this scenario, if you can completely eliminate all transparency from logo by replicating the effects with non-transparent techniques, and retain the original image integrity, then recreate it and use for spot color applications.