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China Clay Kaolin

Kaolin is called china clay in general terms and it is mainly used in manufacturing ceramic and porcelain products. The history reads that it is named after a hill in China called Kao-ling from which it was extracted for many centuries. Over the centuries it was in use and it has a wide variety of applications in industries. It is from the mineral called kaolinite that the kaolin is formed which is basically a white soft powder in nature. Unprocessed Kaolin contains other minerals such as Muscovite, Feldspar and anatase. The other form of kaolin known as crude oil kaolin has a yellow hue of color on it due to the presence of Iron Hydroxide. Industries often need to give a wash with water or chemically bleach kaolin before its commercial use. Kaolin is white, soft, plastic clay mainly composed of fine-grained plate-like particles. Kaolin is formed when the anhydrous aluminum silicate which is found in feldspar rich rocks, like granite, are altered by weathering or hydrothermal processes. China clay consists of Kaolinite Al2Si205(OH)4 commonly known as clay mineral. It is a layered silicate mineral and it is used in many industries.

The quartz and mica of the granite rock retains relative Kaolin whiteness and plasticity making it extremely suitable for its extensive use as a filler, extender, ceramic raw material and pigment. You can find the best quality of refined or processed kaolin at Nilco Impex in the form of powder of lump depending upon the client’s requirement. The product is made in different grades because each industry type requires a different type of it.

Product Description

HS Code:
25070029/ 25070010
The appearance:
White Clay Lumps & Powder Clay
Pink, Off White and White
Size of Kaolin China Clay Lumps:
3cm to 10cm
Size of Kaolin China Clay Powder:
200 to 400 Mash or according to customers requirement

Role of China Clay in various Industries

Ceramics Industry

Ceramic Industries

China clay which is naturally known as hydrated Aluminum Silicate is one of the raw materials in ceramic industries. It has a characteristic of burning white and that makes it suitable for manufacturing of white wares, porcelains and refractory. White wares mainly consist of table wares, sanitary wares, wall tiles and floor tiles. It has an awesome property where it provides strength and plasticity and reduces the process of deformation during the process of firing. In the process of firing china clay to convert into products, whiteness needs to be maintained. The low percentage of other elements such as iron and titanium will ensure that the wares are manufactured with absolute whiteness. The importance of china clay for ceramic industries is immeasurable.


Paper Industries

Kaolin is an industrially important component and one its use is in the making of paper. It is extensively used as an additive in the manufacturing of paper in its filling and coating. Paper contains cellulose; hence kaolin is combined with cellulose fibre to form an integral part of the paper so that appropriate texture can be acquired. Nowadays it is more in demand because wood is not easily available and it is expensive. kaolin is a better alternative. The particle size of the kaolin plays an important role in providing strength to paper. The paper appears better, gives shine as per the requirement, smoothness, brightness, opacity and ability to print. The best quality of paper in terms of appearance, texture, ability to write and print can be obtained with the addition of kaolin in paper manufacturing.



Kaolin has a wide variety of uses and one such applies to paint industries. As compared to a commonly used compound known Titanium Dioxide, kaolin is cost effective. It provides better opacity, glossy and ability to adhere to brushes and get applied on the surface. The formation of cracks in glossy paints can be prevented by making use of calcined kaolin in the manufacturing process. The addition of kaolin is used as an extender and flattening agent in paints. The revolution in paint technology is commendable and it is better done with kaolin as a filler.


Fiberglass Industry

Fiberglass is widely used in many industries and it can be used in many forms. The composite material known as fiber-reinforced polymer is used by reinforcing fiberglass in a polymer. In this process of reinforcement, several minerals and kaolin are used as a filler and effective reinforcing agent. Kaolin is responsible for giving strength and keeps the fiber integrated and providing more tensile strength to it. Some of the uses of such fiberglass is in making parts of cars, boats, sports goods, aviation and aerospace products, fiberglass tanks, fiberglass insulation, and other materials that are required in building and construction. The percentage of kaolin to be combined with fiber is determined by the chemical nature of the fiber, its surface composition and other properties. Nowadays fiberglass has many applications and addition of kaolin in its manufacturing process makes it worthy to use.



Kaolin plays an important role in giving rubber desired properties. It is a kaolin that provides strength and stiffness to rubber so that it can be used for different purposes. Kaolin has an ability to stress transfer which makes it suitable for giving strength and toughness. Previously silica and carbon black was used for the same purpose but kaolin being cost effective, it is used extensively. Kaolin is used in providing better tensile strength to calcium carbonate based rubber. If higher leading and faster extrusion rates are required as compared to strength of the rubber then soft kaolin is used as it has larger grain size. On the contrary if a rubber needs to be of high modulus, high tensile, strength and stiffness then a hard kaolin with smaller particle size is used. It is found that 80% of the clay used in making rubber is hard clay and it is removed as impurities by air separation. The manufacturing of cables and wires will need water washed kaolin or calcined kaolin as it will provide strength, better reinforcement, nice color and higher volume resistivity.



Detergents, Shops, Cosmetic. Kaolin has excellent absorbent quality and controls theology Kaolin is mainly used as a filler in soap production. It also gives the structure and acts as a riser, but the most important function of kaolin is to reduce cost of production. Kaolin is used both in toilet and laundry soaps.



Kaolin is widely used in the cosmetic industry in mud masks for its absorbent qualities and its ability to control rheology. Kaolin clay has been used to help purify, nourish, soothe and heal different skin types. Kaolin is an ideal additive because it helps to control the thickness of the mud solution. Kaolin clay is mild, making it efficient in improving circulation of blood to your skin, as well as elimination of wastes and toxins.