Cyanotypes are an analogue photgraphy technique dating back to the 19th century, they only create blue prints, and this where the architectural term blue print comes from. The chemicals are mixed and then painted on to paper, it is a light sensitive process so this needs to be done in the dark. The cyanotypes combine real size negatives which are printed on acetate these are combined with real size objects, often flowers and grasses which are all exposed together and respond to UV light, An exposure unit for this in winter and in the summe the light direct from the sun. 

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