While intaglio processes yield prints unlike any drawing technique, lithography is quite reproductive. In lithography, the assumption is that the drawing made on the stone or plate will be closely duplicated on the print. Thus, when the stone is dampened with a sponge and an ink-charged roller is passed over it, the ink is deposited on the greasy drawing but not on the wet stone. It does not smear, and it prevents seepage that would blur the image.īecause of the antipathy of grease and water, the image attracts oily ink but repels water. This coating around the image repels the water applied during printing and establishes a grease reservoir. The gum arabic surrounds the greasy sections, forming an insoluble surface film that sticks to the negative areas and crevices of the grain. The nitric acid opens the pores of the stone, enabling the gum and the grease to enter easily. A heavy, syrupy mixture of gum arabic and a small quantity of nitric acid, the etch is used to protect the drawing from water and to further desensitize the undrawn areas to printing ink. Once the drawing is finished, it is fixed with an etch to prevent the spreading of the grease. The image is drawn or painted on the stone or metal plate with greasy litho crayon or a greasy black ink (tusche). Lithography is based on the fact that water and grease do not mix. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.
PRINTMAKING INTAGLIO HOW TO
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