July 11, 2011
From cochineal dye to lipstick technology and from graphite to graphene technology. Ancient women coloured their lips with carmine-red dye from cochineals. Later on pigments like carmine were mixed with waxes like beeswax or carnauba wax to make lip cosmetics smoother. Todays lipsticks come along with modern pigment technology to give women's lips crisp colour and creamy feeling. Carbon is known as charcoal since ancient times. Its modification graphite is basic material for pencils and is used for electrodes and as lubricant. One atom thick sheets of graphite, known as graphene, have "spectacular strength, flexibility, transparency and electrical conductivity". These are promising features for modern graphene technologies in flexible touch screens or solar cells.