What is a planography in printmaking?

Planography is the process of printing on a flat surface.

Explanation:

Planographic printing means printing from a flat surface, as opposed to a raised surface or incised surface. Lithography and offset lithography are planographic processes that rely on the property that water will not mix with oil.

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because of the importance of consistency in data collection. but we have to evaluate the resource or information, and not just accept what is posted online since information available on the internet is not regulated for quality or accuracy.