Actually signed up just to ask this, you sound like some guys who might be able to help!
When trying to create an underbase for wet-on-wet, I'm struggling with getting a choke line on objects of each color, but not on individual objects. Here's an example of what I mean. We're doing this art for a swim team. It's a three color spot print on a dark charcoal shirt. Since the shirt is dark, we'll underbase the whole thing, but we want to put traps only where colors meet so they don't start getting all mucky.
Here is a picture of the art
. The purple is an area that, on the final print, should look like it is just a continuation of the green-shield into the green-banner. There should be no obvious difference in the print, even though in Corel it's two different objects.
Here is a picture of what the white underbase
would look like if I selected all objects, made them all the same color for the base, and added a choke to all objects. It adds the trap I need between colors (for example, between the three colors in the word "FASST"), but it also adds a trap between the objects that SHOULD be the same color (and therefore shouldn't be trapped).
I've tried merging all objects of one color, but silly stuff tends to happen. The only solution so far for this kind of thing has been converting it all to bitmap, then tracing it back in as a 3-color. But it loses clarity, detail, etc. It's not a perfect way to preserve the print.
Hope this makes sense... let me know if there's anything that doesn't. I've been struggling with this for quite a while now. It's killing me!