What do bleed and safe mean on a dieline?
A dieline carries three margins that are easy to confuse: the cut line, the bleed outside it and the safe area inside it. Mix them up and you get white slivers along the edge or a logo that loses its corner. This page explains each one, what belongs where, and why the number on your printer’s specification always beats the number on this page.
Three lines, three jobs
Cut is where the knife trims the sheet. Bleed is artwork that runs past the cut. Safe is the inner zone where critical type and logos stay. Keep them distinct in the brief and on the dieline.
| Margin | Where it sits | What goes there |
|---|---|---|
| Cut | On the knife path | Nothing. It is a line, not an area. |
| Bleed | Outside the cut | Background colour, images and patterns that touch the edge, so a small shift leaves no white sliver |
| Safe area | Inside the cut and clear of every fold | Type, logos, legal lines and the barcode |
- Cut
- Where it sitsOn the knife path
- What goes thereNothing. It is a line, not an area.
- Bleed
- Where it sitsOutside the cut
- What goes thereBackground colour, images and patterns that touch the edge, so a small shift leaves no white sliver
- Safe area
- Where it sitsInside the cut and clear of every fold
- What goes thereType, logos, legal lines and the barcode
How many millimetres?
A few millimetres of bleed and of safe margin is a common starting point; the proof guides in Grapxo bundles use 3 mm for both. It is not a universal number. Some plants ask for more or less, and board, finish and press all play a part. If your printer sends a PDF or a specification, follow it.
Folds and wrapped artwork
On a carton, bleed is only half the story, because the board also folds.
- Keep type off the creases. A fold can shift text by a fraction of a millimetre, and a barcode folded across a crease may not scan.
- Wrap across folds exactly. A graphic that continues from one panel to the next has to meet at the same height on both sides of the crease.
- Expect die-cut variation. A die-cut carton can sit a little differently from sheet to sheet, so bleed and the safe margin matter more than they do on a trimmed flat sheet.
Panel by panel, this is shown on reading a tuck-end dieline. For labels, the same idea is applied in how to prepare a label for print.
What to write in the brief
Carton style, board note, finish, language, and the barcode area only if you provide a barcode. Grapxo invents neither barcodes nor legal copy. If your printer gave you a bleed and a safe margin, write both numbers in the brief.
Grapxo and preflight
Grapxo draws the artwork on the dieline as vectors. Turning the print proof on in the Production tab adds 3 mm safe-area and bleed guides to the bundle. Whether the file passes at your plant is the printer’s call; see the preflight checklist and how to send an SVG dieline. Questions: info@grapxo.com.
Frequently asked questions
Is bleed mandatory?
Yes, whenever colour or artwork runs to the edge. If your printer says otherwise, follow their specification.
Do I need bleed if the design has a white background?
If nothing coloured touches the edge, there is nothing to bleed. A tint, a line or a pattern that touches the edge does need it. When in doubt, add it.
What should stay out of the danger zone?
Critical type, legal lines and the barcode should stay inside the safe area, away from the cut and the folds.
How many millimetres of bleed does a packaging file need?
There is no single number. A few millimetres is a common starting point, and Grapxo’s proof guides use 3 mm. Your printer’s specification wins.
Which millimetres does Grapxo use?
The print-proof guides use 3 mm for bleed and for the safe area. If your printer specifies other numbers, those are the ones to follow.
Start producing in the studio
Write your brief and let Grapxo produce a print-ready vector surface.