Frattini mainly focused on interior and industrial design, he was particularly seen as an expert in the field of traditional wood craftsmanship. Over the years, many collaborations emerged with manufacturers such as Arteluce, Artemide, Bernini, Cassina, Knoll and many others. With his leading designs, Frattini became an important personality in the international design discipline. He achieved great prestige as, among other things, co-founder of ADI in Milan and part of the management team of the world-famous Triennale di Milano Museum. In addition, he won many prizes, including the prestigious Compasso d’Oro.