The invention of a process to repurpose my own (and willing participants) urine into a light sensitive photographic medium.
This new work has numerous inspirations, for example, in the tradition amongst early microbiologists for self-experimentation and self-inoculation, and most recently by Nobel Prize winning scientist Barry Marshall’s selfless ingestion of Helicobacter pylori which resulted a paradigm shift in our understanding of the bacterial aetiology of gastric ulcers and cancer. It is also influenced by the many artists, including Helen Chadwick and Andy Warhol who have used human bodily fluids, and in particular urine, in their work. Finally, I see it is an act that reflects Yves Klein’s work at Le Vide in which “Special blue cocktails were served: a mixture of gin, Cointreau and methylene blue prepared for Klein by La Coupole, the famous brasserie. As Klein intended, the cocktails caused the urine of drinkers to turn blue”
On its own, and unaltered, there is no usable light-responsive biochemistry in urine and so, in order to instil such a function upon my own urine, I ingested 100 mg of Riboflavin. This vitamin is naturally fluorescent so when it is exposed to Ultra Violet light it glows with a yellowy green light. Moreover, the dose is unnecessarily high, and such that, the majority of the Riboflavin that I consumed passes unaltered through my gut, into my blood, and then into my urine making it fluorescent. The image below shows a time course of my urine taken before (far left bijou), and then at 30 minute intervals after consumption (bijous to the right of the first one), and the long wavelength UV light (365nm)reveals the appearance of the fluorescent vitamin Riboflavin, and then its disappearance.
Whilst exhibiting fluorescence, Riboflavin is also sensitive to, and degraded by UV light, and so in order to generate an image using my doped urine, I soaked paper with it and I placed a fern on it to protect UV-sensitive vitamin beneath and then exposed the paper to short wavelength UV (254nm) light for one hour. The resulting Urotypes of the fern leaf can be seen below. Intriguingly, the image is invisible in daylight as it requires UV light to generate the fluorescence, and because Riboflavin is degraded by this type of light, the act of observation destroys the work.