Raw Kaolin (China Clay) is a naturally occurring aluminosilicate mineral supplied by Green Trade India in multiple forms including powder, noodles, and lumps. It is widely used as a mineral filler and functional additive across industries such as ceramics, paper, paints & coatings, rubber, plastics, refractories, and construction materials.
Green Trade India supplies industrial-grade raw kaolin for domestic and export markets, offering customizable specifications, bulk packaging, and technical support to meet diverse processing and application requirements.
| Grade | Form | Applications |
|---|---|---|
| General supply | Multiple forms (see variants) | Paints & coatings, paper, ceramic glazing and body composition. |
| Customized | As per requirement | Grades and suitability can be confirmed based on your application. |
| Powder / noodles / lumps | As per requirement | Form selection depends on handling, transport, and downstream processing. |
| Export supply | As per requirement | Packaging and documentation support available for international shipments. |
Raw kaolin is a naturally mined clay mineral composed primarily of silica (SiO2) and alumina (Al2O3). It is valued for its stable chemical behavior, clean appearance, controlled plasticity, and thermal resistance, making it suitable for a wide range of industrial manufacturing processes.
Raw kaolin is supplied in different physical forms based on handling and processing needs:
Form selection depends on transport, storage, and downstream processing requirements.
Powder is preferred for applications requiring immediate dispersion. Noodles are suitable where dust control and uniform feeding are important. Lumps are chosen for further processing such as washing, grinding, or slurry preparation. Selection depends on your production method and equipment.
| Form | Powder / Noodles / Lumps (as required) |
| Color | Off-white to white (grade dependent) |
| Whiteness / Brightness | Available on request (grade dependent) |
| Moisture | As per requirement |
| Particle size / Mesh | As per requirement |
| pH | As per requirement |
HDPE bags / PP bags / Jumbo bags
| SiO2 | Al2O3 | MgO | K2O | Whiteness | Purity |
|---|---|---|---|---|---|
| 45% – 55% | 35% – 38% | ≤ 0.5% | 1.5% – 3.0% | 75% – 90% | 95% – 99% |
| Melting Point | 1750°C – 1785°C |
| Specific Gravity | 2.55 – 2.65 |
| Density | 2.4 – 2.6 g/cm³ |
| Strength | Moderate (improves after firing) |
| Hardness | 2 – 2.5 (Mohs scale) |
| Thermal Conductivity | Low |
| Dimensional Stability | Excellent at high temperatures |
| Porosity | Low to medium |
| Water Absorption | 10% – 18% |
| Foam | Nil |
| Moisture | 10% – 25% |
| Water absorption | 40% – 65% |
| Water of plasticity | 30% – 45% |
| Oil absorption | 35–55 g/100 g |
| Content | Data |
|---|---|
| Hardness (Mohs) | 2.0 – 2.5 |
| Green strength (dry MOR) | 2 – 4 MPa |
| Dimensions stability | Moderate (improves after washing) |
| Handling strength | Moderate |
| Abrasion loss | Moderate |
| Content | Data |
|---|---|
| Drying contraction | 3 – 6% |
| Firing contraction | 1 – 4% |
| Total shrinkage | 4 – 10% |
| Shape retention | Lower than noodles / granules |
| Thermal conductivity | 0.2 – 0.4 W/m·K |
| Firing temperature | 1100 – 1300 °C |
| Thermal shock resistance | Moderate |
| Typical firing soak | 30 – 90 minutes |
| Viscosity (Lehmann) | 300 – 900 cps |
| Slurry density | 1.55 – 1.70 g/cm³ |
| Runout time | 20 – 50 sec |
| Dispersion behavior | Slower (requires higher shear) |
| Compatible deflocculants | Sodium silicate, Sodium carbonate |
| Optimized addition | 0.2 – 0.5% |
| Typical working dosage | ~ 0.3% |
| pH (aqueous slurry) | Fluorine (F) | MgO | Water-soluble salts | Loss on ignition (LOI) |
|---|---|---|---|---|
| 4.0 – 6.0 | < 0.02% | 0.1 – 1.0% | < 0.2% | 12 – 15% |
| Yellowness (b value) | 3 – 8 |
| Whiteness | 70 – 88% |
| Kaolinite | 70 – 95% |
| Quartz | 3 – 20% |
| Mica / Illite | 1 – 10% |
| Feldspar / Anatase (trace) | < 2% |
| Primary particle size (D50) | 1 – 7 µm |
| Agglomerate size | 50 µm – several mm |
| Bulk density (loose) | 0.9 – 1.3 g/cm³ |
| Bulk density (tapped) | 1.2 – 1.6 g/cm³ |
| Specific gravity (solid) | 2.58 – 2.63 |
| Residue on 325 mesh (after dispersion) | 2.0 – 8.0% |
Quality checks and documentation to support consistent supply
We follow standard checks to ensure consistent quality and compliance.
Quality, reliability, transparency, and customer support in every shipment.
Any test reports can be shared on request at an additional cost, including third-party testing where required.
Processed grades suitable as fillers for ceramics, paper, paints, and coatings.
Common questions about Raw Kaolin
Kaolin Clay, also called China Clay, is a naturally occurring white aluminosilicate mineral composed mainly of kaolinite, silica, and alumina. It is valued industrially for its whiteness, chemical stability, and fine particle size, and is used as a filler and coating material in ceramics, paper, paints, rubber, and refractories.
Kaolin Clay and China Clay are the same mineral — "China Clay" is simply an older name referencing its first known mining site in Kao-ling, China. Both terms refer to the naturally occurring kaolinite-based clay used across industrial applications.
Kaolin Clay is used as a mineral filler and functional additive in ceramics, paper coating, paints and coatings, rubber, plastics, refractories, and construction materials. Its whiteness and stability make it especially valuable in ceramic body formulations and paper brightness enhancement.
Raw Kaolin Clay is supplied in its natural mined form with minimal processing, suited for buyers who beneficiate it further in-house. Processed Kaolin Clay undergoes washing, classification, or calcination to improve brightness, purity, and particle size for direct application use.
Kaolin Clay is commercially supplied in three main forms: powder, noodles, and lumps. Powder suits direct blending, noodles reduce dust and allow controlled feeding, and lumps are preferred for in-house crushing, grinding, or slurry preparation.
No, Kaolin Clay and Bentonite Clay are different minerals with different properties. Kaolin is a low-swelling, low-plasticity kaolinite clay prized for whiteness and stability, while Bentonite is a high-swelling montmorillonite clay prized for absorbency and viscosity control.
The ceramics and paper industries are the largest consumers of Kaolin Clay, using it for tile/sanitaryware bodies and paper coating/filler respectively. It's also widely used in paints, rubber, plastics, refractories, and construction materials.
Yes, Green Trade India supplies Kaolin Clay for both domestic and export markets, with bulk packaging (25 kg, 50 kg, jumbo bags) and complete export documentation support.
The right grade depends on your process: ceramics typically need higher plasticity and controlled particle size, paper coating needs high brightness and fine particle distribution, while paints need good dispersion and opacity. Green Trade India's technical team helps match specifications to your application.
To provide an accurate quote, we typically need the intended application, required form (powder/noodles/lumps), particle size, order quantity, packaging preference, and shipping destination.
Kaolin Clay, also known as Raw Kaolin or China Clay, is one of the world's most widely used industrial minerals. Green Trade India supplies high-quality Kaolin Clay sourced from India for use across ceramics, paper, paints, coatings, rubber, plastics, refractories, construction materials, and numerous industrial manufacturing processes.
Our industrial-grade Kaolin Clay is available in powder, noodle, and lump forms with customizable particle size, whiteness, moisture levels, and packaging options. Whether you require Kaolin Clay for ceramic production, paper coating, mineral filling, or refractory applications, we provide reliable domestic and export supply supported by technical documentation and quality assurance.
| Property | Details |
|---|---|
| Product Name | Kaolin Clay |
| Alternative Names | Raw Kaolin, China Clay |
| Mineral Type | Aluminosilicate Clay Mineral |
| Main Mineral | Kaolinite |
| Origin | India |
| Available Forms | Powder, Noodles, Lumps |
| Color | White to Off-White |
| Supply Scope | Domestic & Export |
| Packaging | 25 kg, 50 kg, Jumbo Bags |
| Supplier | Green Trade India |
Kaolin Clay is a naturally occurring clay mineral primarily composed of kaolinite, silica (SiO2), and alumina (Al2O3). It is formed through the weathering of feldspar-rich rocks over long geological periods.
Due to its high whiteness, chemical inertness, thermal stability, fine particle structure, and low abrasiveness, Kaolin Clay has become an essential raw material for industries requiring performance, consistency, and process efficiency.
Industrial manufacturers use Kaolin Clay as a mineral filler, coating material, reinforcing additive, ceramic raw material, and processing aid in a wide variety of formulations.
Kaolin Clay offers a unique combination of physical and chemical properties that make it suitable for demanding industrial processes.
Used in ceramic body formulations, sanitaryware, porcelain, tiles, tableware, and glazing. Improves workability, firing behavior, strength, and finished product appearance.
Serves as a coating and filler material that enhances brightness, printability, opacity, smoothness, and surface quality in paper manufacturing.
Functions as an extender pigment contributing to improved durability, suspension stability, coverage, and finish quality.
Used as a reinforcing and functional filler to improve dimensional stability, processability, and product performance.
Improves stiffness, surface finish, dimensional stability, and cost efficiency in plastic compounds and polymer formulations.
Thermal stability makes it suitable for refractory products, insulation materials, kiln furniture, and foundry applications.
Used in cement products, engineered materials, coatings, and construction formulations where mineral fillers are required.
Green Trade India supplies Kaolin Clay in multiple physical forms to meet different industrial handling and processing requirements.
Suitable for direct incorporation into manufacturing processes. Offers easy blending and rapid dispersion.
Provides reduced dust generation, improved material handling, and controlled feeding in production environments.
Ideal for customers who perform crushing, grinding, washing, classification, or slurry preparation in-house.
The selection of Kaolin Clay depends on your production process and equipment requirements.
Our technical team can recommend the most suitable Kaolin Clay form based on your application.
| Parameter | Typical Range |
|---|---|
| Form | Powder / Noodles / Lumps |
| Color | White to Off-White |
| Whiteness | Available on Request |
| Moisture | As Required |
| Particle Size | Customized |
| pH | As Required |
| Component | Typical Range |
|---|---|
| SiO2 | 45% – 55% |
| Al2O3 | 35% – 38% |
| MgO | ≤ 0.5% |
| K2O | 1.5% – 3.0% |
| Purity | 95% – 99% |
| Whiteness | 75% – 90% |
| Property | Value |
|---|---|
| Specific Gravity | 2.55 – 2.65 |
| Density | 2.4 – 2.6 g/cm³ |
| Mohs Hardness | 2 – 2.5 |
| Melting Point | 1750°C – 1785°C |
| Bulk Density (Loose) | 0.9 – 1.3 g/cm³ |
| Bulk Density (Tapped) | 1.2 – 1.6 g/cm³ |
| Property | Value |
|---|---|
| Thermal Conductivity | Low |
| High Temp. Stability | Excellent |
| Firing Temperature | 1100°C – 1300°C |
Supplied in its natural mineral form with minimal processing and basic size control. Suitable for applications that perform further processing in-house.
May undergo washing, classification, beneficiation, surface treatment, or calcination to improve brightness, purity, particle size distribution, and application-specific performance.
The choice between raw and processed Kaolin Clay depends on the technical requirements of the final application.
We provide flexible packaging solutions for domestic and export customers.
Green Trade India supports industrial buyers with:
Green Trade India is a trusted supplier of industrial Kaolin Clay for manufacturers, distributors, exporters, and industrial processors.
