What do people typically set for a trap? Is 0.375 pt overkill? I used 0.75 pt once and that was way too much. I’m spreading the lighter colors. One of these colors is metallic silver, which I intend to print first, with a navy blue butting up against it. This is for a wedding invite that needs very tight registration and, obviously, has to look perfect.


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You will need to print the silver last, not first. Silver is opaque and will cover any trapping. If you print the silver first any trapping will show up as a darker line when printing over it with a transparent ink.

I’m printing navy over the silver. The design has silver stripes butting up to a navy border. If I spread the silver and print it last, I’d have the lines running over and into the blue border. I’ll post a pic of the design later.

Here’s the image of what I have to trap. Any suggestions?

image: trapping.png


I have a thought, though I’ve never tried this personally. Depending upon how tightly you can register the colors to each other during printing, what about trapping the navy and printing it first, but only putting the trap in the art where the silver overprints it? That is, have a narrow stroke hanging off the edge of the border stroke at each point where the silver will touch it. Make it a few points shorter than the silver stripe is wide, so that you don’t get little navy points at the top or bottom. With this, you should be able to (carefully!) print the silver over the navy and still have a working trap without the silver falling into the main part of the border. Does that make sense?

Michael Hurley
Titivilus Press
Memphis, TN

Yes, I think I understand what you mean. Like the image here?

I’m running it on a Windmill, so registration isn’t something I worry about too much, but even a tiny shift can show up as a gap.

image: trap 2.png

trap 2.png

Yes, that’s exactly what I mean. I think that’s going to be your best bet.

Michael Hurley
Titivilus Press
Memphis, TN