Royal College of Art student, David Henshall, demonstrating the 'Iondust' brush, which he designed for his end of degree show. The Iondust brush is a self-cleaning duster which uses electrostatic filtering. After use, the brush is actually dry-cleaned. The dirty duster is placed in its pot of charged water; dirt is drawn into the liquid leaving a clean, dry brush. The dirty water is simply poured away.
© Science Museum / Science & Society Picture Library