Figure 18. Concurrent syntheses ((a) with 2-naphthol and (b) with resorcinol) of a red (a) and a yellow (b) azo dye, yielding the mixed colour orange in Figure 17

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