society > leisure > the arts > visual arts > printmaking > surface and planographic printing > printing from metal or plastic plates > [noun] > materials (2)
A transparent sheet placed over a map or diagram, a piece of artwork, etc., to carry instructions or additional material, or (esp. in Photography and…
transitive. To treat (a lithographic plate) with diluted acid in order to clean it and make it receptive to grease. Hence as n., this process, or…