Conquering Prejudice to Save the Union.

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1851?

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Lithograph
Invented in Germany in 1796, lithography is a process for cheaply publishing large editions of prints. To make a lithograph, the artist draws the image on a polished slab of limestone with a greasy medium such as crayon or liquid ink. Before printing, the stone is dampened with water and then inked with a roller. The ink is repelled by the dampened portions of the stone but sticks to the drawn areas. Paper is placed on the stone, which is passed through a printing press. The image, as in other printmaking processes, is transferred to the paper in reverse.
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