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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 ...
A spirit duplicator (also Rexograph and Ditto machine in North America, Banda machine and Fordigraph machine in the U.K. and Australia) is a printing method invented in 1923 by Wilhelm Ritzerfeld, which was used for most of the 20th century. The term "spirit duplicator" refers to the alcohols that were the principal solvents used in generating ...
A rangoli on the occasion of Diwali, Goa, India A rangoli made with flowers on the occasion of Onam Rangoli at Delhi, India Rangoli is an art form that originates from the Indian subcontinent, in which patterns are created on the floor or a tabletop using materials such as powdered limestone, red ochre, dry rice flour, coloured sand, quartz powder, flower petals, and coloured rocks.
A mimeograph machine (often abbreviated to mimeo, sometimes called a stencil duplicator or stencil machine) was a low-cost duplicating machine that worked by forcing ink through a stencil onto paper. [1] The process was called mimeography, and a copy made by the process was a mimeograph.
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.
This simple technology is highly reliable compared to a standard photocopier and can achieve both very high speed (typically 150 pages per minute) and very low costs per copy when copying more than 100 copies. [3] A good lifespan for a risograph might involve making 100,000 masters and 5,000,000 copies.
Xerox art appeared shortly after the first Xerox copying machines were made. It is often used in collage, mail art and book art.Publishing collaborative mail art in small editions of Xerox art and mailable book art was the purpose of International Society of Copier Artists (I.S.C.A.) founded in 1981 by Louise Odes Neaderland.
Dot matrix printers are a type of impact printer that prints using a fixed number of pins or wires [2] [3] and typically use a print head that moves back and forth or in an up-and-down motion on the page and prints by impact, striking an ink-soaked cloth ribbon against the paper. They were also known as serial dot matrix printers. [4]