Torralba was an engraver and painter. He studied at the Superior School of Fine Arts in San Carlos and at the School of Book Arts.
In 1958, he entered the Superior School of Fine Arts in San Jordi and the Conservatory of Book Arts in Barcelona.
In 1961, he founded with the artist Miguel Vila, “Les Editions Chapultepec,” and published seven illustrated editions with the techniques of woodcut and calcography.