Figure 7. Thermolysis of 5-diazosalicylic acid. The time between the two images was 1/25 s. (Photographs: Ducci)

From

Diazotype – A Historical Copying Process

Matthias Ducci

World Journal of Chemical Education. 2021, 9(4), 136-143 doi:10.12691/wjce-9-4-6