In 1918 German typographer and calligrapher Rudolf Koch issued a portfolio entitled Die Schriftgießerei im Schattenbild depicting the operations of the type foundry of the Klingspor brothers in Offenbach am Main in 25 captioned sihouettes. This was undoubtedly the only time that such an elaborate series of technological processes were depicted in sihouette. The images show show 27 men, two women, two boys and two horses at work on the manufacture and despatch of foundry type. Besides the various steps in type founding, test printings by hand-press and rotary press are depicted. The work was translated into English as The Typefoundry in Silhouette: How Printing Type is Developed at Klingspor Bros. in Offenbach on the River Main, and published in San Francisco at The Arion Press in 1982.
