Perforation
Perforation means lines of punching holes made in any material. It is used in making paper objects like stamps or tickets, and along the edges of movies.
In philately, there are three types of the cutting of postage stamps for stamp separation, including:
- Perforation, or cutting rows and columns of small holes.
- Rouletting, or small horizontal and vertical cuts.
- Diecutting, or cutting paper to shape using a metal die (used for self-adhesive stamps).
Perforation Media
A partial image of a sheet of US Postage stamps, 1940 issue, featuring perforations
"Volcanic" perforations made with a needle punch
A needle punch used in orienteering
Perforation holes on a pair of coil stamps
Paper perforator
Punch card from a typical Fortran program.
Related pages
Other websites
The dictionary definition of perforation at Wiktionary