China Clay
Purity That Defines Finish
Five grades of china clay, each refined for its application
From ultra-white ceramic kaolin to pharmaceutical-grade purity — every particle is processed to specification.
Ceramics-Grade China Clay (Kaolin)
The foundation of fine porcelain begins with purity.
Ceramics-grade kaolin is the cornerstone of premium porcelain, vitrified tiles, and sanitaryware production. Its unique platelet structure provides exceptional plasticity and green strength during forming, while controlled shrinkage ensures dimensional accuracy through the firing cycle. Our ceramics-grade china clay is refined through multi-stage hydrocycloning and magnetic separation to achieve ultra-low iron and titanium content — preventing discoloration and ensuring brilliant white-fired bodies.
The fine particle size distribution of our kaolin promotes dense packing within the ceramic matrix, reducing porosity and enhancing mechanical strength in the final product. With carefully controlled alkali content, our clay optimizes the glass-phase formation during sintering — delivering the translucency, hardness, and chemical resistance that distinguish world-class ceramicware.
Core Characteristics
- Ultra-low iron content (Fe₂O₃ ≤ 0.5%) ensuring brilliant white-fired ceramic bodies.
- High plasticity index enabling complex forming on jiggering and casting lines.
- Controlled shrinkage (≤ 12%) preventing warping and cracking during firing cycles.
- Fine particle size (D50 ≤ 2 μm) promoting dense vitrification and low water absorption.
Primary Applications
- Vitrified floor and wall tiles with high-gloss polished surfaces.
- Fine bone china and porcelain tableware for hospitality and retail markets.
- Sanitaryware including wash basins, water closets, and ceramic cisterns.
- Technical ceramics for electrical insulators and refractory kiln furniture.
Paper-Coating China Clay
Smoothness, opacity, and printability — engineered at the particle level.
Paper-coating kaolin is a high-brightness, fine-particle clay used to enhance the surface properties of printing and writing papers. Its unique hexagonal platelet structure lies flat against the paper fiber, creating a smooth, glossy surface that holds ink with exceptional precision. Our coating-grade china clay is processed to achieve ISO brightness levels above 90% and a carefully controlled particle size distribution that optimizes both gloss and opacity.
The delaminated platelets in our kaolin create a microporous coating structure that rapidly absorbs printing ink — preventing offset smearing and enabling high-speed web printing. With low abrasion characteristics, our coating clay extends the life of doctor blades and calender rolls, reducing maintenance downtime in paper mills running at full production capacity.
Core Characteristics
- ISO brightness ≥ 90% delivering superior whiteness and color reproduction.
- Delaminated platelet structure creating high-gloss, smooth coating surfaces.
- Controlled particle size (D50 0.5–1.5 μm) optimizing opacity and ink absorption.
- Low abrasion value (≤ 15 mg) extending coating equipment service life.
Primary Applications
- Coated art paper and glossy magazine stock for high-quality color printing.
- Lightweight coated (LWC) paper for catalogs, brochures, and advertising inserts.
- Containerboard and corrugated medium coatings for premium packaging graphics.
- Specialty label and thermal transfer paper coatings requiring sharp print definition.
Paint & Coatings Grade China Clay
Extending titanium dioxide without sacrificing coverage.
Paint-grade kaolin serves as a functional extender and rheology modifier in architectural, industrial, and automotive coatings. Its fine particle size and high aspect ratio platelets create a spacing effect within the paint film — allowing formulators to partially replace expensive titanium dioxide while maintaining hiding power and tint strength. Our paint-grade china clay is processed to achieve controlled oil absorption and Hegman fineness values compatible with both water-based and solvent-based systems.
The inert chemical nature of our kaolin ensures excellent weathering resistance and color stability in exterior coatings exposed to UV radiation and moisture cycling. With low soluble salt content, our clay prevents flash rusting on metal substrates and efflorescence on masonry surfaces — critical for protective coating performance in demanding environments.
Core Characteristics
- High aspect ratio platelets creating TiO₂ spacing effect for cost-efficient formulation.
- Controlled oil absorption (25–40 g/100g) compatible with diverse resin systems.
- Low soluble salt content preventing flash rust and coating adhesion failures.
- Hegman grind ≥ 7 ensuring smooth dispersion and uniform film appearance.
Primary Applications
- Interior and exterior architectural emulsion paints and textured coatings.
- Industrial maintenance coatings for bridges, tanks, and structural steel.
- Automotive primer and topcoat systems requiring consistent color matching.
- Powder coatings for appliances, furniture, and architectural aluminum profiles.
Rubber & Plastics Grade China Clay
Reinforcing polymers with mineral precision.
Kaolin is a widely used reinforcing filler in rubber compounding and thermoplastic processing — improving mechanical properties, dimensional stability, and surface finish while reducing raw material costs. Our rubber-grade china clay is surface-treated and calcined to achieve optimal compatibility with natural rubber, SBR, EPDM, and polyolefin matrices. The controlled particle size and aspect ratio of our kaolin enhance tensile strength and tear resistance without compromising elasticity.
In cable insulation and automotive hose applications, our calcined kaolin provides excellent electrical resistivity and thermal stability — meeting stringent IEC and SAE specifications. The low moisture absorption of our treated clay prevents porosity and blistering during extrusion and vulcanization, ensuring consistent product quality in high-speed manufacturing environments.
Core Characteristics
- Calcined surface treatment ensuring hydrophobic compatibility with polymer matrices.
- Controlled particle size (D50 1–3 μm) optimizing reinforcement and processability.
- High electrical resistivity (> 10¹² Ω·cm) for cable and wire insulation compounds.
- Low volatile content (≤ 0.5%) preventing porosity during extrusion and molding.
Primary Applications
- Automotive tire tread and sidewall compounds for passenger and commercial vehicles.
- EPDM roofing membranes and weatherstrip seals for construction applications.
- PVC cable insulation and sheathing for power distribution and communication.
- Polypropylene automotive interior panels and appliance housings requiring stiffness.
Cosmetics & Pharmaceutical Grade China Clay
Purity that touches the skin with confidence.
Cosmetic and pharmaceutical-grade kaolin is a gentle, inert mineral used in skincare, personal care, and medicinal formulations. Its fine, soft particles provide excellent absorbent and mattifying properties — making it ideal for face masks, powders, and deodorants. Our pharma-grade china clay is processed under GMP conditions with stringent microbial and heavy metal controls, meeting USP and EP monograph requirements for topical and oral applications.
The neutral pH and absence of irritant impurities in our kaolin make it suitable for sensitive skin formulations and baby care products. In pharmaceutical tablets, our clay serves as a direct-compression excipient — providing binding, disintegration, and flow properties that ensure consistent dose uniformity and dissolution profiles in validated manufacturing processes.
Core Characteristics
- USP/EP grade compliance with microbial limits < 100 CFU/g and absence of pathogens.
- Heavy metal content below pharmacopeial limits (Pb ≤ 10 ppm, As ≤ 3 ppm).
- Neutral pH (6.0–7.5) compatible with sensitive skin and mucosal formulations.
- Soft, non-abrasive particle texture providing gentle exfoliation and oil absorption.
Primary Applications
- Facial masks, cleansers, and exfoliating scrubs for premium skincare brands.
- Mattifying powders, foundations, and dry shampoos for cosmetic formulations.
- Pharmaceutical tablet binders and disintegrants for oral solid dosage forms.
- Baby powders and diaper rash creams requiring hypoallergenic mineral ingredients.
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