"Segni Neri" by Carla Accardi demonstrates the Italian artist's innovative exploration of transparency and light through her distinctive use of varnish applied to sicofoil, a thin plastic material that allows the work to be both translucent and reflective. The black marks of the title (meaning "black signs") create a minimalist composition that engages with the materiality of the support itself, challenging traditional notions of painting surface. This work exemplifies Accardi's commitment to abstraction and her experimental approach to unconventional materials during her prolific career.