China Clay (Kaolin Powder)
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China Clay (Kaolin Powder)
China Clay, also known as Kaolin, is a soft, white clay rich in hydrated aluminum silicate. It is prized for its high plasticity, chemical inertness, whiteness, and low abrasiveness. At Bigrock Mines & Minerals, we produce premium-quality washed and refined China Clay powder, sourced from our rich mineral reserves in Rajasthan.
Our Kaolin is carefully processed to ensure high brightness, controlled particle size, and minimal impurities — making it suitable for diverse applications in ceramics, paper, paint, rubber, plastics, cosmetics, and more.
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Property |
Specification Range |
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Brightness (ISO) |
80% – 88% |
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pH Value |
4.5 – 6.5 |
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Particle Size |
Fine (200–325 mesh) |
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Oil Absorption |
30 – 45 g/100g |
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Residue on 240 mesh |
< 1% |
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Packaging |
40 kg / Jumbo bags |
Key Features
Why Choose Bigrock China Clay?
Industrial Usage : Bigrock China Clay
Ceramic & Porcelain Industry
China Clay is a primary ingredient in the ceramics industry, used for manufacturing tiles, sanitaryware, porcelain, tableware, and decorative pottery. It provides plasticity for shaping, helps retain form during firing, and improves the whiteness and surface finish of the final ceramic product. Its thermal stability and chemical inertness make it ideal for high-temperature applications.
Paper & Pulp Industry
In paper manufacturing, Kaolin serves as a key coating and filler material. It enhances surface smoothness, opacity, printability, brightness, and ink receptivity of paper. Coated paper made with kaolin is widely used in magazines, brochures, packaging, and premium notebooks. It also reduces raw material costs by partially replacing wood pulp.
Paints & Coatings Industry
China Clay is widely used as a functional extender pigment in both water-based and oil-based paints. It improves rheology (flow properties), suspension, and gloss control. Additionally, it enhances the scrub resistance, color retention, and matte finish in architectural and industrial coatings, while reducing cost.
Rubber & Plastics Industry
Kaolin acts as a reinforcing filler in rubber products like tyres, tubes, footwear soles, seals, and conveyor belts. It increases abrasion resistance, tensile strength, and dimensional stability. In plastics, it improves heat resistance, stiffness, and helps reduce shrinkage in molded parts.
Cosmetics & Personal Care
Due to its smooth, absorbent, and non-toxic nature, China Clay is used in face masks, powders, lotions, soaps, and skincare products. It helps absorb oil, cleanse skin impurities, and add a silky texture to cosmetic formulations — especially for sensitive or oily skin types.
Water Filtration & Detergent Industry
Kaolin is used in water filtration units to trap impurities and enhance purification. In the detergent sector, it acts as a mild abrasive and bulking agent that aids in scrubbing without damaging surfaces. It’s also used in powder detergents and floor cleaners for better texture and absorption.
Refractories & Insulation
Though less common than Ball Clay, high-alumina Kaolin is used in some refractory bricks and thermal insulation materials. Its high temperature resistance and chemical stability make it suitable for kiln linings, firebricks, and insulation boards in specific formulations.