Ehrhardt has been described as based on the "typefaces of stout Dutch character that the Ehrhardt foundry in Leipzig showed in a late-seventeenth-century specimen book". These designs are believed to have been designed by the Hungarian punchcutter Miklós (Nicholas) Tótfalusi Kis while working in Amsterdam; his work has also been called Janson due to a historical misattribution. Ehrhardt has a slightly condensed design, giving it a strongly vertical, crisp appearance.
From 1937 to 1938, the Monotype corporation re-cut the type for modern-day usage, and it has become a popular book typeface. Usage includes the Penguin 60s series of books that were published to commemorate that company’s 60th anniversary, the current Oxford World’s Classics series (as of 2014) and many other Oxford University Press books. An extremely rare infant variant of the typeface also exists, which can be seen in the American edition of the book Hey! Get off Our Train by John Burningham.
Inspired by Ehrhardt, designer and lawyer Matthew Butterick created an updating called Equity, praising its 'satisfying heft and authority'. This design was inspired by the requirements of his work as a lawyer; it was created for sale with separate grades designed to suit different types of paper and printers, and separate small caps fonts intended for use in Word. Font Bureau also created the font Kis, inspired specifically by Ehrhardt, adding a display size intended for headlines. It is used by the Los Angeles Times but has not been released for general sale.
- "Ehrhardt". MyFonts. Monotype. Retrieved 14 June 2015.
- Middendorp, Jan (2004). Dutch type. Rotterdam: 010 Publishers. p. 25. ISBN 9789064504600.
- Butterick, Matthew. "Equity specimen" (PDF). Practical Typography. Retrieved 13 July 2015.
- "Monotype Recorder" (PDF). Metal Type. Retrieved 30 June 2015.
- Butterick, Matthew. "Equity". Practical Typography. Retrieved 13 July 2015.
- Porchez, Jean François. "Equity review". Typographica. Retrieved 13 July 2015.
- "Kis FB". Font Bureau. Retrieved 26 July 2015.