Leaving out B and replacing it by rain water, this makes also a good solution for the cyanotype.

The following process, discovered at the same time as the cyanotype, and termed chrysotype, is thus described by Sir John Herschel:

It should then be put in the printing frame in the same way as the cyanotype paper and exposed to the sun.

It is more like an adult picture book: text telling a detailed story, with luminous cyanotype printed images behind or around the words.

Prints made upon this cyanotype paper have a beautiful blue tone, and are so simple and easily made that they are very popular.

Wu uses acrylic gel to paste the cyanotypes onto a huge canvas in his studio.

Cyanotype printing, invented by Sir John Herschel in 1842, involves placing a negative directly on paper coated with a UV-sensitive combination of cyanide and iron.