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2. Self-adhesive stamp - Wikipedia

   en.wikipedia.org/wiki/Self-adhesive_stamp

   Self-adhesive stamp. 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. Stamp collectors have criticized the format, because the rubber-based adhesive used tends to yellow the stamps progressively.

3. Pressure-sensitive adhesive - Wikipedia

   en.wikipedia.org/wiki/Pressure-sensitive_adhesive

   Pressure-sensitive adhesive ( PSA, self-adhesive, self-stick adhesive) is a type of nonreactive adhesive which forms a bond when pressure is applied to bond the adhesive with a surface. No solvent, water, or heat is needed to activate the adhesive. It is used in pressure-sensitive tapes, labels, glue dots, stickers, sticky note pads, automobile ...

4. List of Machin stamps - Wikipedia

   en.wikipedia.org/wiki/List_of_Machin_stamps

   All barcoded stamps are self-adhesive. Existing definitive stamps issued from 15 February 1971 to 31 January 2022 remain valid until 31 January 2023: since 31 March 2022, they can be indefinitely exchanged for the barcoded series. The 2022 issue was the last release in the Machin series prior to the death of Elizabeth II.

5. Postage stamp separation - Wikipedia

   en.wikipedia.org/wiki/Postage_stamp_separation

   For postage stamps, separation is the means by which individual stamps are made easily detachable from each other. Methods of separation include: perforation: cutting rows and columns of small holes. rouletting: small horizontal and vertical cuts. diecutting: cut paper to shape using a metal die—used for self-adhesive stamps.

6. Adhesive label - Wikipedia

   en.wikipedia.org/wiki/Adhesive_label

   Adhesive label. An adhesive label or sticky label is a small piece of paper designed to be affixed to any surface, [1] typically by the action of removing a layer of adhesive on the front or back of the label. The term adhesive refers to a sticky substance, while something that is self-adhesive implies that it will stick without wetting or the ...

7. Postage stamp gum - Wikipedia

   en.wikipedia.org/wiki/Postage_stamp_gum

   Postage stamp gum. In philately, gum is the substance applied to the back of a stamp to enable it to adhere to a letter or other mailed item. The term is generic, and applies both to traditional types such as gum arabic and to synthetic modern formulations. Gum is a matter of high importance in philately.