Dutch designer Martijn Rigters developed a process that uses human hair to create surface treatments and decoration on diverse metals. “The Color of Hair” project draws its inspiration from traditional ceramic techniques. By applying natural fibers to a carefully heated surface, the material carbonises instantly and acts as a form of ink that has similarities to etching and anodising. This reaction is caused by the hair’s main protein, keratin. The transformation during this process is permanent and durable.