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The most familiar type of label is the postage stamp, which was developed in the mid-19th century. The concept has since been extended into a variety of areas:
- On mail:
- On other kinds of paper objects:
Almost every imaginable type of paper and adhesive has been used at some point; see postage stamp paper and postage stamp gum for a more detailed discussion. Label may be produced individually, or in sheets, which case they are usually separated by perforations or rouletting, see postage stamp separation.