The cyanotype process is one of the earliest photographic techniques that remains popular to this day. Paper is coated with the cyanotype solution then exposed to ultraviolet light. Objects placed on top of the paper – whether natural things like plants, man-made items or negative film – is reproduced on the paper in stark monochrome, the silhouetted details held back to white while the exposed areas bloom into shades of Prussian blue. In the past its simplicity made it especially useful for reproducing documents of building designs, hence the term ‘blueprint’.
These days you can even use the technique to physically print your digital Nikon photos by first converting them into negatives in Photoshop and printing them onto a sheet of transparency film, before overlaying the physical transparency onto your