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The Sinclair ZX Printer, a small spark printer for the ZX81 and ZX Spectrum computers. Spark printing is an obsolete form of computer printing and before that fax and chart recorder printing which uses a special paper coated with a conductive layer over a contrasting backing, originally black carbon over white paper but later aluminium over black paper.
Three styles of loose leaf graph paper: 10 squares per centimeter ("millimeter paper"), 5 squares per inch (“engineering paper"), 4 squares per inch (“quad paper") Graph paper, coordinate paper, grid paper, or squared paper is writing paper that is printed with fine lines making up a regular grid. It is available either as loose leaf paper ...
Thermal printing (or direct thermal printing) is a digital printing process which produces a printed image by passing paper with a thermochromic coating, commonly known as thermal paper, over a print head consisting of tiny electrically heated elements. The coating turns black in the areas where it is heated, producing an image.
Optically variable ink used in popular USB drives that are often subject to counterfeiting. Taken from 2 different angles. Optically variable ink (OVI) also called color shifting ink is an anti-counterfeiting measure used on many major modern banknotes, as well as on other official documents (professional licenses, for example).
Risograph is a brand of digital duplicators manufactured by the Riso Kagaku Corporation, [1] [2] that are designed mainly for high-volume photocopying and printing. It was released in Japan in 1980. It is sometimes called a printer-duplicator, as newer models can be used as a network printer as well as a stand-alone duplicator.
An example of a wide-carriage printer, designed for paper 14 inches wide, shown with legal paper loaded (8.5"×14") Print head of a 24-pin printer (Tally Genicom T2240) Print head of a 9-pin printer (Star NL10) The common serial dot matrix printers use a horizontally moving print head. [32]
In printing, registration black is a black color that includes 100% of each of the process colors used. Typically these are cyan, magenta, yellow and black , [4] but if different colors are used, registration black marks are made with all of the colorants (inks). [4] Registration black is used for printing crop marks and registration marks ...
[citation needed] Compared to CMC-7, some pairs of E-13B characters (notably 2 and 5) can produce relatively similar results when magnetically scanned; however, as a fallback if magnetic reading fails, E-13B also performs well under optical character recognition. [1] The E-13B repertoire can be represented in Unicode (see below).
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