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from | Encarta |  |
Early Printing Press |
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| Invented by Johannes Gutenberg around 1450, the printing press made the mass publication and circulation of literature possible. Derived from the presses farmers used to make olive oil, the first printing press used a heavy screw to force a printing block against the paper below. An operator worked a lever to increase and decrease the pressure of the block against the paper. | ||||||
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| Technology; Printing | ||||||
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