Type of cyan.

This is a cyanotype print i made last year. It's an old photo printing process developed by Sir John Herschel in 1842. You print a negative onto transparency and paint a piece of absorbant paper with a mildly photosensitive chemical solution (in the dark). When it's dry, you fasten the negative transparency onto the paper and take into the sunlight to expose. The sun is like a giant enlarger. Old processes are fun :)