The cyanotype is a photographic process invented in Great Britain in the early 1840s.

Using photosensitive reagents, it enables blue prints to be made from negatives or imposed objects on sensitised paper.

Cyanotypes are made using paper coated with reagents, then exposed under a UV lamp with an original negative drawing in between. The papers are then rinsed with water to reveal the drawing.

Le procédé est soumis à différentes variables (mélange des réactifs, badigeon sur le papier, etc.) qui peuvent faire varier les nuances.

Paper

Cyanotype prints are printed on white art paper (300g/m²).

Colour

The pigment formed by the reaction between the products exposed to UV light is Prussian blue.