These cyanotypes have been created using the traditional cyanotype photographic process invented by Sir John Herschel in 1842. The cyanotype process is distinctive for producing rich, cyan-blue prints. High quality watercolour paper is initially coated with a mix of two chemicals - ferric ammonium citrate and potassium ferricyanide - and allowed to dry. The treated paper is then re-wet using various liquids prior to the placing of plant material on top of the paper. These liquids create a further chemical reaction with the original cyanotype chemicals. The print is then placed in the direct sun to develop. After developing, it is washed and dried. Whilst a time-consuming process, the finished print is always unique, unable to be replicated and sometimes very beautiful!