Auto-Generating Sticker Cut Lines (CutContour) — Why You Should Ditch Manual Work
Die-Cut Stickers: Why Cut Lines Are the Problem
A die-cut sticker is trimmed to follow the exact contour of its artwork. To make that cut, every design must have a cut line (CutContour) — a vector path that tells the plotter exactly where to cut.
The problem is the process of creating that path:
- Open the image in Illustrator
- Remove the background
- Trace the contour and create a path
- Apply an offset
- Assign the CutContour spot colour
- Place it on a dedicated layer
That's 5–15 minutes per design. For a print shop handling dozens or hundreds of jobs a day, this is a severe bottleneck.
Pressria Bridge's Approach
Pressria Bridge (PB) automates the entire sequence:
- Background removal — AI-powered (rembg/u2netp) automatic background stripping
- Contour detection — Precise design-edge detection via OpenCV
- Cut-line generation — Smooth offset cut-line path created with Shapely
- Spot-colour assignment — CutContour/PerfCutContour spot colours applied automatically
- PDF export — Print-ready PDF with OCG layers preserved
Processing time: seconds per design.
Kiss-Cut vs Die-Cut
| Type | Die-cut | Kiss-cut |
|---|---|---|
| Cut line | CutContour | PerfCutContour |
| Cutting | Cuts through sticker and backing | Cuts sticker only; backing intact |
| Use case | Individual stickers | Sticker sheets |
PB supports both. Just select the type at the start of your job.
Nesting Included — One Pipeline, Start to Finish
Once cut lines are generated, PB's NFP nesting engine optimally arranges the stickers on the sheet — grouping identical designs together and filling remaining space with the NFP algorithm.
Background removal → cut-line generation → nesting → print-ready PDF: all handled in a single desktop app. No other tool on the market does this today.
Learn more about Pressria Bridge: pb.pressria.com