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A school newspaper published using a ditto machine in 1978 A hand-cranked spirit duplicator from the 1960s. The duplicator uses two-ply "spirit masters", also called "master sheets". The first sheet can be typed, drawn, or written upon. The second sheet is coated with a layer of wax that had been impregnated with one of a variety of colorants.
A good lifespan for a risograph might involve making 100,000 masters and 5,000,000 copies. Risograph printers use a soy ink made from vegetable soybean oil. One disadvantage of this soy based ink printing medium is that all paper stock has to be uncoated for the ink to dry and adhere to the paper stock.
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.
Duplicating machines were the predecessors of modern document-reproduction technology. They have now been replaced by digital duplicators, scanners , laser printers , and photocopiers , but for many years they were the primary means of reproducing documents for limited-run distribution.
According to the French historian Max Gallo, "for over two hundred years, posters have been displayed in public places all over the world.Visually striking, they have been designed to attract the attention of passers-by, making us aware of a political viewpoint, enticing us to attend specific events, or encouraging us to purchase a particular product or service."
Hewlett-Packard 9862A calculator plotter drawing a Lorenz attractor. A plotter is a machine that produces vector graphics drawings. Plotters draw lines on paper using a pen, or in some applications, use a knife to cut a material like vinyl or leather.
Model 66 was perhaps the most famous Gestetner machine, designed by Raymond Loewy; examples are currently housed in the British Museum and Churchill's War Bunker in Whitehall. After the first typewriter was invented, a stencil was created which could be typed on, thus creating copies similar to printed newspapers and books, instead of ...
The special aniline dyes for making the master image came in the form of ink or in pens, pencils, carbon paper and even typewriter ribbon. Hectograph pencils and pens are sometimes still available. Various other inks have been found usable to varying degrees in the process; master sheets for spirit duplicators have also been pressed into ...