The wash-like appearance of Goya's print "Giant" was created using these techniques:
C. Aquatint.
Aquatint is an intaglio printmaking technique that allows for the creation of tonal areas and gradients resembling a wash or watercolor effect. It involves applying a fine-grain resin or powdered rosin to a metal plate, which is then heated to create a tonal pattern. The areas covered with the resin will resist acid during the etching process, resulting in a range of tones when inked and printed. Goya used aquatint to achieve a wash-like appearance in his print "Giant."