Figure 16. Top: Diazotype with yellow azo dye (motif: Traditional Turkish houses in the centre of Ankara/Turkey); bottom: The same image under UV light (λ = 365 nm)

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