Crash helmet with a useful smell
Monday, June 7, 2010 - 11:20
in Physics & Chemistry
Cycle helmets are available in a wide range of types, including foldable models, models fitted with a flashing rear light or featuring an iPhone display. In future, they will start to smell distinctively if they need to be replaced. A new process causes odoriferous oils to exude from plastic materials if they are cracked.