Cyanotypes are wonderfully fun, incredibly simple, and everyones favorite color: Blue

Cyanotypes are made with 2 chemicals. Potassium Ferricyanide and Ferric Ammonium Citrate. 

Both are components of Iron that are commonly found in our environments. Ferric Ammonium Citrate comes as a green or brown flake, both of which can be used interchangeably, and can also be used as fertilizer. I know of a man who buys it specifically for his tree company, to shoot it up into trees to encourage growth. Potassium Ferricyanide is primarily used in ultramarine dyes and for a variety of other scientific process. Nearly any pigment in the ultramarine family is most likely made with potassium ferricyanide. It sounds scary, but the iron is so strongly bound to the cyanide that it will not go anywhere. This chemical is why your jeans are blue. 

• talk about anna atkins, and it's inventors
• how the color blue is made
• blueprints
• percentages and how to mix up
• photos below should be of coating paper, processing in water, hanging to dry, etc. 

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