The drawings were made with a subtractive technique, after preparing the cardboards with with a dark bituminous substance. Each signed B. Ghivarello.
a) 125 x 142 mm. b) 162 x 119 mm. c) 113 x 153 mm.
Subtractive technique: the method of covering the paper with graphite, charcoal or any removable dark substance marks, which are then erased to create the desired image. The technique allows the artist to add texture, establish tonal forms and create the effect of reflected light.