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  2. Real photo postcard - Wikipedia

    en.wikipedia.org/wiki/Real_photo_postcard

    A typical 1940s–early 1950s black-and-white real photo postcard. A real photo postcard (RPPC) is a continuous-tone photographic image printed on postcard stock. The term recognizes a distinction between the real photo process and the lithographic or offset printing processes employed in the manufacture of most postcard images.

  3. Photo print sizes - Wikipedia

    en.wikipedia.org/wiki/Photo_print_sizes

    The alternative Super series, denoted SnR, nR Plus or nR+, has an aspect ratio of 3∶2 (or as close as possible) and thus provides a better fit for standard 135 film (35 mm) at sizes of 8 inches or above. 5R is twice the size of a 2R print, 6R twice the size of a 4R print and S8R twice the size of 6R. 4D/6D is a newer size for most consumer ...

  4. Postcard - Wikipedia

    en.wikipedia.org/wiki/Postcard

    The official size for British postcards between 1894 and 1899, measuring 115 mm × 89 mm (4.5 in × 3.5 in). Divided Back Postcards with a back divided into two sections, one for the message, the other for the address. British cards were first divided in 1902 and American cards in 1907. [48] Early

  5. List of photographic film formats - Wikipedia

    en.wikipedia.org/wiki/List_of_photographic_film...

    A blank space means that manufacturer did not make film in that size. Two numbers in one box refers to films available with different numbers of exposures, usually 6 and either 10 or 12. Spool length is measured between inner faces of the flanges; several films of the same image size were available on different spools to fit different cameras.

  6. History of postcards in the United States - Wikipedia

    en.wikipedia.org/wiki/History_of_postcards_in...

    "Greetings from Chicago, Illinois" large-letter postcard produced by Curt Teich The history of postcards is part of the cultural history of the United States. Especially after 1900, "the postcard was wildly successful both as correspondence and collectible" and thus postcards are valuable sources for cultural historians as both a form of epistolary literature and for the bank of cultural ...

  7. Paper size - Wikipedia

    en.wikipedia.org/wiki/Paper_size

    This implies that all postcards have an aspect ratio in the range from 20∶17 = 1.18 to 12∶7 = 1.71, but the machinable aspect ratio is further restricted to a minimum of 1.30. The only ISO 216 size in the US postcard range is A6. The theoretical maximum aspect ratio for enveloped letters is 23∶7 = 3.29, but is explicitly limited to 2.50.

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