Die cut

Die cutting is pressing down with a blade to cut paper. With self-adhesives, usually either straight or a serpentine lines are die cut into stamps without slicing entirely through the surrounding backing paper. This keeps a pane intact while making it easy to remove stamps from the sheet.

Die cutting can also be used to cut stamp into exotic shapes, now a common thing.  File:France Marianne bklt pair self adh.jpg|France self-adhesive pair from a booklet showing the simple straight die cuts. File:US 37c coil self adh.jpg|US 37¢ horizontal coil with serpentine die cutting. 

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