Chemical Name: Aluminium Silicate (Al2O3, 2SiO2, 2H2O) China Clay Kaolin Clay is naturally occurring hydrated Aluminium Silicate. It mainly has oil absorbing properties, reduced shine and translucent properties. It also provides hiding effect and reduces the usage of TiO2 to a great extent.Paper Industry: China Clay is used as a filler which reduces its overall cost, improves its printing properties such as brightness, smoothness and gloss.