Whiting is a clay mineral with the chemical composition Al2Si2O5(OH)4. 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 Whiting are known as china clay or kaolin or kaolinite.
The name is derived from Gaolin ("High Hill") in Jingdezhen, Jiangxi province, China. Whiting was first described as a mineral species in 1867 for an occurrence in the Jari River basin of Brazil
Whiting is one of the most common minerals; it is mined, as kaolin, in Brazil, France, United Kingdom, Gerany, India, Australia, Korea , the People's Republic of China, and the USA.
Whiting has a low shrink-swell capacity and a low cation exchange capacity (1-15 meq/100g.) It is a soft, earthy, usually white mineral (dioctahedral phyllosilicate clay), produced by the chemical weathering of aluminium silicate minerals like feldspar. In many parts of the world, it is colored pink-orange-red by iron oxide, giving it a distinct rust hue. Lighter concentrations yield white, yellow or light orange colours.
Application
Wall
:
It is used to apply on wall as house, office, building for before a Painting. (Consumer use)
Paints
:
It is used in various paints like distempers, cement primer, wood primer, texture paint, spray plaster, putties, fillers & undercoats. (Industrial use)
Plastic
:
It is used as a filler in combination with others to impart strength & smoothness in plastic Industry. (Industrial use)
Rubber
:
It is used as manufacture any type of rubber like tyre, tube, eraser, Etc.(Industrial use)
Technical Specifications (Ingredient name and its % of mix)
Sio2
45% to 48%
Al2o3
33% to 39%
Fe2o3
Below 1.5%
Tio2
Below 0.5%
Cao
Below 1%
Mgo
Below 0.5%
LOI
12% to 14%
Acid Insoluble
97.5%
PH
8.1
B.D.
0.5 gm/cc
Oil absorption
39.5 ml/100gm
Whiteness
78% to 85%
Precaution to be taken before & during usage of product
Take a oil paint to Mix a Whiting, then apply to a wall as level before applying clean a wall with 150 range waterproof paper .