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You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
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.
The ideas of teaching machines and programmed learning provided the basis for later ideas such as open learning and computer-assisted instruction. Illustrations of early teaching machines can be found in the 1960 sourcebook, Teaching Machines and Programmed Learning. [12] An "Autotutor" was demonstrated at the 1964 World's Fair. [13]
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."
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Motivational posters can have behavioral effects. For example, Mutrie and Blamey, [4] of the University of Glasgow and the Greater Glasgow Health Board, found in one study that their placement of a motivational poster that promotes stair use in front of an escalator and a parallel staircase, in an underground station, doubled the amount of stair use.
Chromolithography is a method for making multi-colour prints. This type of colour printing stemmed from the process of lithography, [1] and includes all types of lithography that are printed in colour. [citation needed] When chromolithography is used to reproduce photographs, the term photochrome is frequently used.