China Clay, Packaging Size : 25kg

China Clay is a white, soft, plastic clay mainly composed of fine-grained plate-like particles. Kaolin is formed when the anhydrous aluminium silicates which are found in feldspar rich rocks, like granite, are altered by weathering or hydrothermal processes. The process which converted the hard granite into the soft matrix found in kaolin pits is known as “kaolinisation”. The quartz and mica of the granite remain relatively unchanged whilst the feldspar is transformed into Kaolinite.It is a layered silicate mineral, with one tetrahedral sheet linked through oxygen atoms to one octahedral sheet of alumina octahedra. Rocks that are rich in Kaolinite are known as kaolin or china clay. Kaolinite is a mineral belonging to the group of alumino-silicates. It is commonly referred to as “China Clay” because it was first discovered at Kao-Lin, in China. The term kaolin is used to describe a group of relatively common clay minerals dominated by Kaolinite and derived primarily from the alteration of alkali feldspar and micas.China clay is an industrial mineral used primarily as an inert filler and it is combine with other raw materials in a wide variety of applications. Kaolin is a white, soft, plastic clay mainly composed of fine-grained plate-like particles. Kaolin is formed when the anhydrous aluminium silicates which are found in feldspar rich rocks, like granite, are altered by weathering or hydrothermal processes.The quartz and mica of the granite remain relatively unchanged whilst the feldspar is transformed into Kaolinite. The refining and processing of the fine fraction of the kaolinised granite yields predominantly Kaolinite with minor amounts of mica, feldspar, traces of quartz and, depending on the origin, organic substances and/or heavy minerals. Individual kaolins vary in many physical aspects, which in turn influence their end use. Of particular commercial interest is the degree of crystallinity which influences the brightness, whiteness, opacity, gloss, film strength, and viscosity.China Clay is a hydrated Aluminium silicate, part of the group of industrial minerals, with the chemical formula Al2Si2O5(OH)4.Kaolin is very soft mineral (occupying place 2-2.5 in the Mohs hardness scale).Synonyms of China Clay includes Kaolin, Levigated china clay, Kaolinite, Metakaolin, Ball clay, etc.