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  2. Rubber stamp - Wikipedia

    en.wikipedia.org/wiki/Rubber_stamp

    There are three main types of rubber stamp inking technology: traditional stamps with a separate ink pad, self-inking stamps with a self-contained die that flips to make an imprint, and pre-inked stamps where the die material is impregnated with ink.

  3. Carter's Ink Company - Wikipedia

    en.wikipedia.org/wiki/Carter's_Ink_Company

    Carter's Ink Company was an American manufacturer of ink and related products, based first in Boston and later in Cambridge, Massachusetts. [2] It was once the largest ink manufacturer in the world. [3] Apart from ink, Carter produced a line of fountain pens during a brief period in the 1920s.

  4. Penny Black - Wikipedia

    en.wikipedia.org/wiki/Penny_Black

    The Penny Black was the world's first adhesive postage stamp used in a public postal system. It was first issued in the United Kingdom on 1 May 1840 but was not valid for use until 6 May. The stamp features a profile of Queen Victoria . In 1837, British postal rates were high, complex and anomalous. To simplify matters, Sir Rowland Hill ...

  5. Postage stamp paper - Wikipedia

    en.wikipedia.org/wiki/Postage_stamp_paper

    Watermark detection can be as simple as holding the stamp up to a light or by placing it face down on a black surface. If this does not reveal the watermark there are fluids, electrical devices and ink pads that may reveal the thinning of the paper;

  6. Cancellation (mail) - Wikipedia

    en.wikipedia.org/wiki/Cancellation_(mail)

    1929 machine cancellation used to cancel 1d stamp on first flight cover from Nassau to Miami. A cancellation (or cancel for short; French: oblitération) is a postal marking applied on a postage stamp or postal stationery to deface the stamp and to prevent its reuse. Cancellations come in a huge variety of designs, shapes, sizes, and colors.

  7. Passport to Your National Parks - Wikipedia

    en.wikipedia.org/wiki/Passport_to_Your_National...

    Passport to Your National Parks is a program through which ink stamps can be acquired at no cost at park visitor centers and ranger stations at nearly all of the 429 units of the United States National Park System and most of the National Park Service 's affiliated areas. The program is run by Eastern National, a non-profit organization that ...

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