- William Caslon An empire of typefounding William Caslon's work has long been associated with Colonial American printing and letterpress printing in general. It was chosen as the exclusive face for the Printing Office in the 1950's and remains the house face in our demonstrations in front of the public today. Caslon was fantastically popular during the period and was used by many of ...www.happysnowman.com/desbib/type/caslon.html