There is something very elemental about taking a plate, covering it with black material, hard ground, and then just scratching out a drawing ... And when the acid bites into the metal and the ink sits in the metal and then it is transfered to the paper, it stands up on teh paper and there is an indentation. And then what you have is the result of something that is quite mysterious as a process.

Sean Scully, interview with Julia Klüser, in Sean Scully, Prints: Catalogue raisonné 1968–1999, Vienna: Graphische Sammlung Albertina, Gravelines: Musée du Dessin et de l’Etampile Originale, Wuppertal: Von der Heydt-Museum, 1999, pp. 143–145 (p. 143).