# Cut line

> A cut line indicates a path where material is intended to be cut through, such as a package outline or window.

Canonical: https://dielinemaker.com/glossary/cut-line
Last updated: 2026-10-26

Geometry

## What it means in packaging

Cuts define free edges and openings. A coloured stroke is only a visual convention; the receiving production workflow must recognise its layer, spot colour or line type. A cut mistakenly assigned to a fold can separate a panel from the package.

## A practical example

The outside edge of a tuck flap is cut. The edge joining the same flap to the carton body is creased.

## What to check

Inspect open paths, duplicate contours and line assignments after importing a supplier file.

## Use it in your project

- [Import a supplier dieline](https://dielinemaker.com/learn/supplier-dielines)
- [Print checks and production exports](https://dielinemaker.com/learn/print-checks-and-exports)

## Related terms

- [Crease](https://dielinemaker.com/glossary/crease) — A crease is a controlled deformation of board that guides a fold without cutting through the material.
- [Perforation](https://dielinemaker.com/glossary/perforation) — A perforation is a series of cuts separated by uncut bridges that creates a controlled tear or separation line.
- [Trim](https://dielinemaker.com/glossary/trim) — Trim is the intended finished boundary of printed work after excess material is cut away.

## Related

- [Packaging glossary](https://dielinemaker.com/glossary)