What do diazo prints consist of?

Diazo prints are a specific type of reproduction that primarily consists of white paper upon which blue lines have been developed. The diazo process relies on the photochemical reaction of diazo compounds, which results in the characteristic blue lines forming on a white background. This makes diazo prints particularly useful in architectural and engineering applications for blueprints and other similar documents where clarity and contrast are essential. The process ensures that the blue lines are easily distinguishable against the white paper, which is important for reading and interpreting the prints effectively.