The long-time assistant and protege of Günter Gerhard Lange, Dieter Hofrichter, was born in Mannheim Baden-Württemberg, Germany. Hofrichter attended the Rödel Art School where he studied typography and calligraphy under the type designer Herbert Post (Post-Antiqua, Post-Mediaeval), and applied and decorative arts under Professor Charles Crodel. Later he studied graphic design at the Academy of Fine Arts in Nuremberg under Professor Karl Hans Walter, where he also took classes in typesetting.
After his studies, Hofrichter worked for several years as a graphic designer. In 1980, he commenced designing typefaces for himself in his own studio. After years of practice, he eventually approached Lange of the Berthold foundry in 1988. Impressed by Hofrichter's work, Berthold hired him in 1989 as a type developer and assistant to Lange. In 1990, Berthold published Hofrichter's "Vergil" as a Berthold Exklusiv.
From their first introduction through Lange’s death, Hofrichter worked closely with Lange to develop new typeface designs and improve classic designs. Hofrichter described Lange as his "most important teacher".
In 2000 Berthold released a joint effort of Lange and Hofrichter, a Scotch type named "Whittingham." Other Hofrichter contributions include the 2001 release of the enhanced Akzidenz-Grotesk and the release of Futura BQ. Hofrichter continues his association with Berthold, adding to the type program. Recent releases include AG Book, Akzidenz-Grotesk Next and AG Royal.