Dentist's shade guide: “I picked this up at an unusual junk shop in New York’s East Village called Obscura. It’s an old circular shade guide for dentists when they’re giving you replacement teeth, but over the years the chemicals they used to create the various shades have reacted differently to the material, so it’s not a perfect gradation anymore. It echoes the orthodontist’s sign but also the toilets [at the end of this slideshow]: from beaten up to pristine.”