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  2. Heliographic copier - Wikipedia

    en.wikipedia.org/wiki/Heliographic_copier

    A heliographic copier or heliographic duplicator [1] is an apparatus used in the world of reprography for making contact prints on paper from original drawings made with that purpose on tracing paper, parchment paper or any other transparent or translucent material using different procedures.

  3. Tracing paper - Wikipedia

    en.wikipedia.org/wiki/Tracing_paper

    The sizing in production will determine whether it is for laser printer or inkjet/offset printing. Tracing paper may be uncoated or coated. [further explanation needed] Natural tracing paper for laser printing is usually uncoated. The HS code for tracing paper is 4806.30. [4] Tracing paper can be recycled and also can be made from up to 30% ...

  4. Mimeograph - Wikipedia

    en.wikipedia.org/wiki/Mimeograph

    The process was called mimeography, and a copy made by the process was a mimeograph. Mimeographs, along with spirit duplicators and hectographs , were common technologies for printing small quantities of a document, as in office work, classroom materials, and church bulletins.

  5. Non-printing character in word processors - Wikipedia

    en.wikipedia.org/wiki/Non-printing_character_in...

    Non-printing characters or formatting marks are characters for content designing in word processors, which are not displayed at printing. It is also possible to customize their display on the monitor. The most common non-printable characters in word processors are pilcrow, space, non-breaking space, tab character etc. [1] [2]

  6. 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 photocopiers produce on every printed page that identifies the specific device that was ...

  7. Void pantograph - Wikipedia

    en.wikipedia.org/wiki/Void_pantograph

    In security printing, void pantograph refers to a method of making copy-evident and tamper-resistant patterns in the background of a document. Normally these are invisible to the eye, but become obvious when the document is photocopied. Typically they spell out "void", "copy", "invalid" or some other indicator message. [1]

  8. Printmaking - Wikipedia

    en.wikipedia.org/wiki/Printmaking

    Reduction printing is a name used to describe the process of using one block to print several layers of color on one print. Both woodcuts and linocuts can employ reduction printing. This usually involves cutting a small amount of the block away, and then printing the block many times over on different sheets before washing the block, cutting ...

  9. QWERTY - Wikipedia

    en.wikipedia.org/wiki/QWERTY

    The name comes from the order of the first six keys on the top letter row of the keyboard: QWERTY. The QWERTY design is based on a layout included in the Sholes and Glidden typewriter sold via E. Remington and Sons from 1874. QWERTY became popular with the success of the Remington No. 2 of 1878 and remains in ubiquitous use.