In 1930 Mauro Reggiani was in Paris, where he came into contact with the non-figurative avant-garde by meeting Arp, Klee, Kandinskij, Ernst and Magnelli. Back in Italy he decides to suspend the pictorial research he had started earlier and to suspend the public exhibitions of his works. The decisive turning point in Reggiani's painting - towards a process of emancipation from the real datum - in fact began to mature two years after his stay in Paris: in 1934, together with Bogliardi and Ghiringhelli, he signed the Declaration of the exhibitors, on the occasion of the first exhibition of the Italian abstractionism held at the Galleria del Milione in Milan. In this same exhibition Reggiani presents, together with various pictorial works, his first graphic works. In these etchings, as in the one belonging to the Invernizzi Collection dating back to 1935, Reggiani inaugurates a new conception of space, which develops from a pile of surfaces.