Jason Kronenwald, based in Toronto, has a strange choice of materials for his artwork- chewing gum. Each Gum Blonde is made from 100% chewed gum and it's placed on a plywood backing. No paint or dye is used.
The colours are mixed in the mouth using a variety of colours and flavours. And get this Jason prefers not to chew the gum himself so he has a dedicated team to look after that part of the process.
Jason Kronenwald's Chewed Portraits Made of Gum
Fashion Spy — May 20, 2006 — Unique
References: gumblondes & gushmagazine