Giorgio Mastinu's gallery occupies a small space at number 3126 in San Marco, on the Crosera de le Botteghe, between Campo Santo Stefano and Campo San Samuele. Active since 2008, it is considered one of the smallest galleries in Venice and functions more like a private studio than a traditional commercial space.

Its programme stems from the gallerist's personal research, oriented towards works on paper, photography, illustrated books and editions, spanning the modern and the contemporary from Lucio Fontana to Giulio Paolini with periodic forays into designer objects.

The relationship with Ronan Bouroullec is long-standing: the gallery had already exhibited his drawings and collages in 2016 and, in 2022, the Rombini vases designed with his brother Erwan.

In September 2025, on the occasion of the Venice Glass Week, the gallery presented "Inchiostri", a project by Ronan Bouroullec created with the Murano master glassmaker Simone Cenedese.

The works are a series of modular vases in Murano glass, each composed of four elements, two cast glass blocks, a blown tube available in two heights, and a low blown bowl, rendered in a palette of eleven colours drawn from the Murano tradition, including "bluino".

From the virtually infinite possible combinations, Bouroullec selected twenty compositions, assembled without fixings, held together by the balance of their weights alone.

The flat faces are left raw to intensify the chromatic vibration, while the edges are polished to let the light pass through. The blocks are made from cotissi, the irregular fragments left over from glassblowing, fed back into the production cycle. The title "Inchiostri" (inks) alludes to the luminous depth achieved through transparency, and the project revisits a principle that has accompanied Bouroullec since the "Vases combinatoires" of 1997, objects with no definitive configuration, which the user can recompose.

During its run, the exhibition received the Fondazione di Venezia Prize at the fifth edition of the Venice Glass Week, as a bridge between the language of cast glass and Murano's blown-glass tradition.