Making cyanotypes (or "blueprints") is one of the most pleasurable fair-weather activities around. You get to make beautiful, indigo-colored photograms while hanging out in the sunshine, making it the perfect summer activity. 

Cyanotypes are a form of cameraless photography invented in 1842 but John Herschel. A sheet of paper (or fabric, or wood) is coated with light-sensitive chemicals. Objects are placed onto the surface and it's then...

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