Cyanotype

cyanotype is a photographic printing process that gives a cyan-blue print.

The English scientist and astronomer Sir John Herschel discovered this procedure in 1842. Even though John Herschel is perhaps the inventor of the cyanotype process, Anna Atkins actually brought this to photography. She created a limited series of cyanotype books that documented ferns and other plant life. By using this process, Anna Atkins is regarded as the first female photographer.

The process uses two chemicals: