He made his debut in comics at fifteen, continuing his father's humorous series Doña Urraca (Mrs. Magpie) after his death in 1960, under the pseudonym "Jordi".

[1] From 1962, Bernet developed a more realistic style, and took on smaller assignments from Italian and British publishers, until he started illustrating for the Franco-Belgian comics magazine Spirou in 1965.

[2] Turning to the German market, in the 1970s he collaborated with Cussó to create Wat 69, a sexy and humouristic heroine for the magazine Pip, and Andrax, a science fiction series for Primo, which both became successful in Germany.

[3] After the fall of Franco, Bernet returned to Spain and worked for several Spanish comics magazines such as Creepy, Metropol and Cimoc, eventually meeting three writers with whom he would form productive partnerships.

When Alex Toth, after producing two stories of Torpedo 1936 in 1981, decided he did not share Abulí's darkly humorous view of mankind and parted with the project, Bernet was asked to continue the work.