these experiments were conducted within the context of an already published master's thesis titled "Desenhar no metal: A gravura como meio de representação da violência" and were conducted following the experimental methods of FBAUP's printmaking workshop under the guidance of Graciela Machado and in collaboration with the many researchers involved, having resulted in an instructional manual as well as a published article titled "A White Etching Ground for Drawing: An Argument for Rembrandt’s Lost Ground"