Landing on the moon 50 years later: A multi-analytical investigation on Superficie Lunare (1969) by Giulio Turcato

Giulio Turcato (Mantova 1912–Rome 1995) was an Italian artist, belonging to the figurative and abstract expressionist currents. At the end of the 1960s, fascinated by the US space program, Turcato produced a series of artworks, differing in colour and shape, titled Superficie Lunare (Moon Surface). To reproduce a realistic moon surface, Turcato used polyurethane foam as support for the painting. The combination of this unconventional material and the pictorial ones makes Superficie Lunare an interesting case of study to understand the alteration phenomena in contemporary art. In this study, a blue painted Superficie Lunare (1969) was analysed by means of non-invasive (ER-FTIR, Raman and X-ray spectroscopy) and micro-invasive techniques (µ-ATR, μ-FTIR, μ-Raman, Py-GC/MS, EGA-MS and SEM-EDS). The results point out the use of a polyurethane foam as support and of a poly(vinyl acetate) based Prussian blue paint tube as main constituent of the paint layer. The analyses highlight also the complexity of the paint layer, showing the presence of lampblack and Al foil mixed to the blue paint, lithopone inside the white crater and possibly ferric oxide in the red one. The results confirm the use of a polyurethane foam for the support. The painted layers present a binder composed of poly(vinylacetate), with polystyrene, possibly present as additive. Concerning the nature of the blue pigment, Prussian blue was identified on the whole surface. In some points, also lampblack was detected. Furthermore, small foils of Al were found inside the paint layer, probably to give sparkling effect. Inside the moon craters, lithopone was identified for the white pigment and possibly iron oxide for the red one. The multi-technique approach allowed also to obtain information about the manufacturing of the used Prussian blue and the occurrence of alteration process for the polyurethane foam.