I'm actually still improving the "Cita" formula to reach a shorter exposure time. But even now it's possible to shoot an incamera iron process photography in more or less 60 minutes, depending on the aperture you choose. In my small Mouse Trap Cameras with f-stops around 1.4 and 2 it only takes 5 minutes to take a photograph
In this experiment I used my old LÖBER field camera from 1895 which is equipped with a self made objective and the lens from a 110 years old binocular. Focal length is 160mm. To reach a nice field and a sharp image I choosed a f-stop of 8. It was a sunny day with a UV index of 5 and I started with the exposure after lunch at 13:00PM. The result was really nice.
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