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  2. Line printer - Wikipedia

    en.wikipedia.org/wiki/Line_printer

    In a typical drum printer design, a fixed font character set is engraved onto the periphery of a number of print wheels, the number matching the number of columns (letters in a line) the printer can print. The wheels, joined to form a large drum (cylinder), spin at high speed. Paper and an inked ribbon are stepped (moved) past the print position.

  3. Point (typography) - Wikipedia

    en.wikipedia.org/wiki/Point_(typography)

    1 / 12 ⁠ picas. 1 / 72 ⁠ in. In typography, the point is the smallest unit of measure. It is used for measuring font size, leading, and other items on a printed page. The size of the point has varied throughout printing's history. Since the 18th century, the size of a point has been between 0.18 and 0.4 millimeters.

  4. Printer tracking dots - Wikipedia

    en.wikipedia.org/wiki/Printer_tracking_dots

    Yellow dots on white paper, produced by color laser printer (enlarged, dot diameter about 0.1 mm) Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code (MIC), is a digital watermark which many color laser printers and copiers produce on every printed page that identifies the specific device that was used ...

  5. Movable type - Wikipedia

    en.wikipedia.org/wiki/Movable_type

    t. e. Movable type (US English; moveable type in British English) is the system and technology of printing and typography that uses movable components to reproduce the elements of a document (usually individual alphanumeric characters or punctuation marks) usually on the medium of paper.

  6. Microprinting - Wikipedia

    en.wikipedia.org/wiki/Microprinting

    Microprinting. Microprinting is the production of recognizable patterns or characters in a printed medium at a scale that typically requires magnification to read with the naked eye. To the unaided eye, the text may appear as a solid line. Attempts to reproduce by methods of photocopy, image scanning, or pantograph typically translate as a ...

  7. Control character - Wikipedia

    en.wikipedia.org/wiki/Control_character

    Control character. In computing and telecommunications, a control character or non-printing character (NPC) is a code point in a character set that does not represent a written character or symbol. They are used as in-band signaling to cause effects other than the addition of a symbol to the text.

  8. Woodblock printing - Wikipedia

    en.wikipedia.org/wiki/Woodblock_printing

    Woodblock printing. The intricate frontispiece of the Diamond Sutra from Tang dynasty China, the world's earliest printed text containing a date of production, AD 868 (British Library) Woodblock printing or block printing is a technique for printing text, images or patterns used widely throughout East Asia and originating in China in antiquity ...

  9. Letterpress printing - Wikipedia

    en.wikipedia.org/wiki/Letterpress_printing

    Letterpress printing is a technique of relief printing for producing many copies by repeated direct impression of an inked, raised surface against individual sheets of paper or a continuous roll of paper. [1] A worker composes and locks movable type into the "bed" or "chase" of a press, inks it, and presses paper against it to transfer the ink ...

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