"Relief printing is a family of printing methods where a printing block, plate or matrix that has had ink applied to its surface, but not to ...
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any recessed areas, is brought into contact with paper. The areas of the printing plate with ink will leave ink on the paper, whereas the recessed areas of the printing plate will leave the paper ink-free. A printing press may not be needed, as the back of the paper can be rubbed or pressed by hand with a simple tool such as a brayer or roller.
In many historical processes, the matrix in relief printing is created by starting with a flat original surface and then removing (e.g., by carving) away areas intended to print white. The remaining areas of the original surface receive the ink. The relief family of techniques includes woodcut, metalcut, wood engraving, relief etching, linocut, rubber stamp, foam printing, potato printing, and some types of collagraph." - (en.wikipedia.org 26.03.2020)
