1955: Founding of Becromal by E. Ch. Rosenthal. The first electrochemical etchings are made.

1966: Construction of the Rozzano production site and headquarters.

1969: Production of the first high voltage foils with the know-how support of Siemens.

1986: E. Ch. Rosenthal dies. His son, Harry Pierre, becomes President of Becromal.

1988: Establishment of Becromal of America in, Clinton/Tennessee.

1992: Start of production of the new foil types, A991 and later A992, A993 and A994. With these new products, Becromal consolidates its leading position in the field of high voltage foils.

1993: First Certification to ISO 9002 specifications.

1995: Establishment of Becromal Norway.

2001 - 2002: important investments in high voltage foil production in Milan, Italy and Clinton, Tennesee, USA

2006: Implementation of a new high-voltage etching technology pilot plant in Milan.

2009: New plant in Iceland starts production of fifth generation of high-voltage foils.