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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.
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.
Since 1974, the United States Postal Service has issued self-adhesive stamps that some collectors find difficult to separate from envelopes via the traditional method of soaking in water. Heptane-based products like Bestine, as well as limonene-based products, have become popular solvents for removing stamps more easily.
Benjamin Franklin — George Washington The First U.S. Postage Stamps, issued 1847. The first stamp issues were authorized by an act of Congress and approved on March 3, 1847.[ 20] The earliest known use of the Franklin 5¢ is July 7, 1847, while the earliest known use of the Washington 10¢ is July 2, 1847.
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.
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 ...
3. Denomination. 4. Country name. A postage stamp is a small piece of paper issued by a post office, postal administration, or other authorized vendors to customers who pay postage (the cost involved in moving, insuring, or registering mail). Then the stamp is affixed to the face or address-side of any item of mail —an envelope or other ...
The stamps were also circular in shape and printed on embossed gilt-foiled paper, thus matching the design of the coins being commemorated. [4] Subsequent philatelic issues employed other off-beat designs – including stamps shaped like hearts, birds and fruit – and Tonga continued to issue self-adhesive stamps printed on paper. [4]