One of the older photographic processes in existence, the same process is also used to make blueprints. A coating of several special chemicals are brushed onto select paper. Then a negative image is placed over the dried coated photosensitive paper. The paper and negative are then placed in a glass frame and exposed to sunlight or artificial UV light for a designated time and then developed into this unique Prussian blue print. No two are exactly alike and are numbered and limited edition.