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LithographyLithography is a process based on the chemical principle that oil and water do not mix. Images are drawn on limestone or metal plates with crayons and inks which contain wax or oil. After treatment with gum arabic, the non-image areas become water-receptive. The stone or plate is wet before each inking with a roller, so the oil-base ink will adhere only to the image areas. Paper is pressed against the surface with a bar or roller press.
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