Born in Florence in 1933, has been active since the 1950s. He studied first in Milan, then in other areas of Europe where he matched wits with other talents and came into contact with the work of the great European abstractionists from whom he learned the lessons of strict formal rigour. In the 1960s, his production shifted from abstract-geometric works to compositions showing an absolute sensibility for colour and, in the 1970s, to research and use of new materials. His works of this period are characterised by use of corrugated cardboard. In the works of the 1980s, he undertook intense research into colour in relation to space, creating works from which colour as a strong aspect of his personality is easily deduced. In the 2000s, Masi began using such new materials as Plexiglas, with which he has created rectangular and round works in brilliant colours. Since his early experiences with Informale painting and concrete abstractionism, Masi’s work has been articulated, complex and diversified at the technical-linguistic level. His works become conceptual markers in the landscape and, in the case of his Polaroids, act as analytic studies of urban codes. His intensive activity continues and is acknowledged both in Italy and abroad; his works are featured in the collections of MART of Rovereto, the Galleria d’Arte Moderna of Palazzo Pitti in Florence and the Galleria d’Arte Moderna of Turin, the Museo Pecci of Prato and the Museo Novecento of Florence. His works are all characterised by an unceasing experimental evolution capable of extending even to broad urban spaces.