What is a dieline? Meaning in packaging design
Packaging artwork is drawn on a dieline, and errors there show up only when the box is folded.
Definition
DielineA dieline is a flat technical template of a package that shows where it will be cut, folded, glued and perforated, along with bleed and safe areas for artwork. Designers place the artwork on the dieline, and the printer or converter uses it to make the cutting die, so it must match the exact structure and material of the final pack.
How dielines work in a packaging project
The safest source of a dieline is whoever makes the packaging: the box printer, the label converter or the factory if it supplies packaging. Their template reflects the real board thickness, flap lengths and tolerances of their machines. A dieline downloaded from a template library may look the same and still be off by a few millimetres, which is enough for text to wrap around a fold.
A good dieline shows cut lines, fold or crease lines, glue areas, bleed beyond the cut line and a safe zone inside it, usually in distinct spot colours on separate layers. Text, barcodes and legal information should sit well inside the safe zone. Barcodes also need enough quiet space around them and a print size scanners can read.
Typical problems: the product grows slightly after samples and the box no longer fits; the barcode lands on a fold; a mandatory warning ends up on a glue flap that disappears when assembled; or the varnish and foil layers are not aligned with the dieline. Ask for a white sample of the structure, fold it, and check the product fits before artwork is finalised. Print the artwork at full size and fold it by hand.
Print-ready dielines are delivered in our identity and packaging stage. Label content rules are covered in the guide packaging and label requirements.
Related terms
Brand identity
The name, logo, colours, type, packaging style and voice that make a brand recognisable.
Planogram
A diagram showing exactly where and how each product is placed on a retail shelf.
Tech pack
The technical specification a factory needs to make a product: drawings, materials, sizes, labels.
Golden sample
The approved reference unit that mass production and inspections are compared against.
Frequently asked questions
Who should provide the dieline?
Ideally the packaging manufacturer or printer, because it matches their materials and equipment. If a designer creates it, the printer should confirm it before artwork goes on.
What file format is a dieline?
Usually a vector file, such as AI or PDF, with cut, fold and bleed lines on separate layers in spot colours that will not print.
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