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Self-adhesive stamp
Self-adhesive postage stamp / From Wikipedia, the free encyclopedia
A self-adhesive stamp is a postage stamp with a pressure-sensitive adhesive that does not require moistening in order to adhere to paper. They are usually issued on a removable backing paper.
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Stamp collectors have criticized the format, because the rubber-based adhesive used tends to yellow the stamps progressively. It makes stamps difficult to remove from covers,[1] and to save in mint condition, though self-adhesives of recent years have improved in these respects.
Artistamps have also been issued in a self-adhesive format.[citation needed]