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  2. 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. [18] The 2022 issue was the last release in the Machin series prior to the death of Elizabeth II.

  3. Postage stamps and postal history of the Confederate States

    en.wikipedia.org/wiki/Postage_stamps_and_postal...

    During the first seven weeks of the Civil War, the U.S. Post Office still delivered mail from the seceded states. Mail that was postmarked after the date of a state's admission into the Confederacy through May 31, 1861, and bearing U.S. (Union) postage is deemed to represent 'Confederate State Usage of U.S. Stamps'. i.e., Confederate covers franked with Union stamps. [4]

  4. Rubber stamp - Wikipedia

    en.wikipedia.org/wiki/Rubber_stamp

    A rubber stamp is an image or pattern that has been carved, molded, laser engraved, or vulcanized onto a sheet of rubber. Rubber stamping, also called stamping, is a craft in which some type of ink made of dye or pigment is applied to a rubber stamp, and used to make decorative images on some media, such as paper or fabric. [ 1][ 2][ 3][ 4]

  5. Postage stamps and postal history of the United States

    en.wikipedia.org/wiki/Postage_stamps_and_postal...

    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.

  6. Microcontact printing - Wikipedia

    en.wikipedia.org/wiki/Microcontact_printing

    Microcontact printing (or μCP) is a form of soft lithography that uses the relief patterns on a master polydimethylsiloxane (PDMS) stamp or Urethane rubber micro stamp [1] to form patterns of self-assembled monolayers (SAMs) of ink on the surface of a substrate through conformal contact as in the case of nanotransfer printing (nTP). [2]

  7. Nature of America - Wikipedia

    en.wikipedia.org/wiki/Nature_of_America

    Nature of America is a series of twelve self-adhesive stamp sheets that the United States Postal Service released annually between 1999 and 2010 starting with the Sonoran Desert sheet [3] [5] and ending with the Hawaiian Rain Forest Sheet. [6] [7] Like the Celebrate the Century stamp series, these were printed on large sheets 9"x8¾" (233mm x ...

  8. List of British postage stamps - Wikipedia

    en.wikipedia.org/wiki/List_of_British_postage_stamps

    Low value definitives, 1873–80 (coloured corner letters) Low value definitives, halfpenny to 5d 1880–81. Penny Lilac 1881, the most issued Victorian stamp. High value definitives, 2/6 to £1 1883–84. Lilac and Green low value definitives 1883. Jubilee issue postage stamps 1887–92.

  9. Seal (emblem) - Wikipedia

    en.wikipedia.org/wiki/Seal_(emblem)

    A seal is a device for making an impression in wax, clay, paper, or some other medium, including an embossment on paper, and is also the impression thus made. The original purpose was to authenticate a document, or to prevent interference with a package or envelope by applying a seal which had to be broken to open the container (hence the ...

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