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[colorblind]

Originally Posted by almaink

? for what? I trapped PDF's using Indy for years. Found it faster for small jobs then running through Trapwise. In fact my workflow was open Indy file, export as PDF. Import that PDF into a new Indy file, set the trapping in the trap pallet. Now comes what I guess most call the tricky part.
When you print to your rip you must select separations and Application built in Trapping .

Here is a link all about it. It's what I based my workflow on altho I altered it a bit to fit my needs.
His link tells about how to generate a trapped composite PDF from InDesign.
InDesign 2.0: Generating Composite, Trapped PDFs

Could be a tricky workflow to place PDFs in InDesign. Especially PDFs that have trapping annotations. You will see the trapping in Acrobat but place the PDF in InDesign and it's now gone. Trapping annotations are instructions that PS3 rips can understand but InDesign not being a rip, ignores them.