Producing photostats took about two minutes in total. Johnny gives Frank some photostats that make Dutch look pretty dirty. It was the expense and inconvenience of photostats that drove Chester Carlson to study electrophotography. It contained hundreds of Photostats of what seemed to be military reports. A modern critical edition by Evelyn Jamison was published in 1972 based on surviving photostats. The original photostats are held at the National Archives in Washington D.C.. The photographic prints produced by such machines are commonly referred to as "photostats".