Postage stamp separation
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For postage stamps, separation is the means by which individual stamps are made easily detachable from each other.
The Penny Black is imperforate.
Separation of imperforate stamps by scissors, knife or tearing often leads to uneven margins on the stamp as in this 1853 stamp of Van Diemen's Land.
Vertical pair of 1d red, from Plate 70, perforated with the Archer experimental roulette
Perforated and imperforate versions of the same Austrian stamp of 1920
Miniature sheet
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A souvenir sheet or miniature sheet is a postage stamp or a small group of postage stamps still attached to the sheet on which they were printed. They may be either regular issues that just happen to
Postage stamp separation
…stamp vending equipment (the United States did this in the 1900s and 1910s), as novelties for stamp collectors (particularly when stamps are issued in souvenir sheets), or as errors. In 1847, Henry Archer of the United Kingdom constructed the first (rouletting) machine, the "Archer Roulette", to separate stamps. His…
Liechtenstein miniature sheet with four stamps "Illustrations of the Codex Manesse - 800th Anniversary of Wolfram von Eschenbach" (1970)
This US souvenir sheet of 1936, issued for the TIPEX exhibition, consists of four contemporary commemoratives, imperforate.
A miniature sheet from the Faroe Islands, in which the stamp forms a part of the larger image
The British miniature sheet for the London 2010 Festival of Stamps