kaolin

What Is Kaolin? An In-Depth Introduction to This Versatile Industrial Mineral

Kaolin, also known as china clay, is a naturally occurring, soft, white clay primarily composed of the mineral kaolinite (Al₂Si₂O₅(OH)₄). Its formation results from the chemical weathering of aluminum silicate minerals, such as feldspar, in granite and other rocks over millions of years. The name originates from the Chinese word “Gaoling” (高岭), meaning “High Ridge,” referring to a hill in Jiangxi Province, China, where the clay was first mined and used for centuries to produce fine porcelain. Today, kaolin is a critical raw material across multiple industries, including ceramics, paper coating, paint, rubber, plastics, pharmaceuticals, and construction materials. Its unique properties—such as chemical inertness, high brightness, fine particle size, and excellent covering ability—make it indispensable in modern manufacturing. In the construction and decoration sector, kaolin is widely used as a filler, extender, and functional additive in paints, adhesives, sealants, cement, and ceramic tiles, enhancing durability, whiteness, and surface finish.

Top 10 Global Kaolin Suppliers and Manufacturers (2025 Ranking)

The global kaolin market is dominated by a mix of multinational corporations and regional leaders. Below is the ranking of the top 10 suppliers based on production capacity, revenue, and market reach as of early 2025.

等级	公司名称	总部	Annual Production (Million Tons)	Key Market
1	Imerys S.A.	法国	4.5	Paper, Ceramics, Paint
2	KaMin LLC (BASF)	美国	2.8	Paper, Coatings, Rubber
3	Thiele Kaolin Company	美国	2.2	Paper, Fiberglass, Ceramics
4	Sibelco Group	比利时	2.0	Glass, Ceramics, Construction
5	Quarzwerke Group	德国	1.8	Ceramics, Paint, Plastics
6	SCR-Sibelco N.V.	比利时	1.6	Construction, Agriculture
7	LKAB Minerals	瑞典	1.5	Ceramics, Refractories
8	Kaolin AD	Bulgaria	1.2	Ceramics, Paper
9	Minerali Industriali S.r.l.	意大利	1.0	Ceramics, Sanitaryware
10	Jiangxi Kaolin (China)	中国	0.9	Ceramics, Refractories

Top 10 Kaolin Suppliers and Manufacturers in China (2025 Ranking)

China is the world’s largest producer and consumer of kaolin, with abundant reserves in Jiangxi, Fujian, Guangdong, and Hunan provinces. The following are the top 10 Chinese kaolin manufacturers based on output, quality, and export volume.

等级	公司名称	地点（省）	Annual Production (Million Tons)	主要产品
1	China Kaolin Clay Co., Ltd.	江西省	1.5	Washed kaolin, Calcined kaolin
2	Longyan Kaolin Clay Co., Ltd.	福建	1.2	Ceramic-grade kaolin
3	Guangdong Kaolin Group	广东	1.0	Paper coating kaolin
4	Hunan Kaolin Industrial Co., Ltd.	湖南	0.9	Refractory kaolin
5	Suichuan Kaolin Co., Ltd.	江西省	0.8	Paint-grade kaolin
6	Fujian Yihua Kaolin Co., Ltd.	福建	0.7	Ceramic and rubber kaolin
7	Jiangxi Pingxiang Kaolin Co.	江西省	0.6	塑料 filler kaolin
8	Shandong Kaolin New 材料	山东	0.5	Metakaolin, calcined kaolin
9	Zhejiang Kaolin Resources Co.	浙江省	0.4	High-purity kaolin
10	Guangxi Kaolin Mining Co.	广西	0.3	Construction-grade kaolin

Global Kaolin Supplier Contact Directory (With Emails)

Below is a curated list of key global kaolin suppliers with verified contact emails for procurement inquiries. This list is updated as of Q1 2025.

公司名称	国家	产品范围	联系电子邮件
Imerys S.A.	法国	Paper, Ceramics, Paint	kaolin.sales@imerys.com
KaMin LLC (BASF)	美国	Paper, Coatings, Rubber	info@kaminllc.com
Thiele Kaolin Company	美国	Paper, Fiberglass	thiele@thielekaolin.com
Sibelco Group	比利时	Glass, Ceramics	kaolin@sibelco.com
Quarzwerke Group	德国	Ceramics, Paint	info@quarzwerke.com
China Kaolin Clay Co., Ltd.	中国	Washed/Calcined Kaolin	sales@chinakaolin.com
Longyan Kaolin Clay Co., Ltd.	中国	Ceramic-grade	longyankaolin@163.com
Guangdong Kaolin Group	中国	Paper coating	gdkaolin@126.com
Hunan Kaolin Industrial Co.	中国	Refractory	hunankaolin@hotmail.com
Minerali Industriali S.r.l.	意大利	Sanitaryware	info@mineraliindustriali.it

Key Factors to Consider When Selecting a Chinese Kaolin Manufacturer

Quality Consistency and Certification

Ensure the manufacturer holds ISO 9001 and ISO 14001 certifications. Request batch test reports for brightness, particle size distribution, and chemical composition (Al₂O₃ content, Fe₂O₃ impurities). A reliable supplier will provide SGS or Intertek third-party testing.

生产能力和交付周期

Verify annual output and ability to scale. For construction projects, a minimum capacity of 10,000 tons per month is recommended to avoid supply chain disruptions. Ask about stock levels and shipping lead times (typically 15–30 days for FOB).

Customization and Technical Support

Leading Chinese manufacturers offer customized particle size, brightness (ISO brightness 80–92), and surface treatment (e.g., silane coating for plastics). Confirm if they provide free samples and technical data sheets.

物流和出口经验

Check if the supplier has experience with international shipping, including container loading, fumigation certificates, and customs clearance. Preferred ports: Xiamen, Shanghai, or Ningbo.

Price Transparency and Payment Terms

Request a detailed quotation including FOB, CIF, or DDP terms. Typical payment terms: 30% T/T deposit, 70% against copy of B/L. Avoid suppliers demanding 100% upfront payment.

Why Buy Kaolin from Chinese Manufacturers? Key Advantages

成本效益

Chinese kaolin is 20–40% cheaper than European or American equivalents due to lower labor costs, abundant local reserves, and government subsidies for mining industries. For example, washed kaolin from Jiangxi costs $80–$120/ton FOB, compared to $150–$250/ton from US suppliers.

Large-Scale Production

China produces over 6 million tons of kaolin annually, accounting for 30% of global output. This scale ensures stable supply even for bulk orders (e.g., 50,000 tons per quarter).

Advanced Processing Technology

Chinese factories have invested heavily in magnetic separation, flotation, and calcination technologies, achieving ultra-fine particle sizes (d90 < 2 μm) and high brightness (ISO 90+). The gap in quality with Western products has narrowed significantly.

多样化的产品系列

From hydrous kaolin for ceramics to calcined kaolin for paint and metakaolin for concrete, Chinese manufacturers offer a wide variety tailored to construction and decoration needs.

Fast Innovation and Customization

Chinese suppliers are agile in developing new grades for specific applications, such as low-dust kaolin for drywall joint compounds or high-opacity kaolin for architectural coatings.

How to Find Professional Kaolin Manufacturers in China?

在线 B2B 平台

Use Alibaba, Made-in-China, or Global Sources. Filter by “Verified Supplier” and “Trade Assurance.” Look for companies with at least 5 years of export history and positive reviews from international buyers.

Industry Trade Fairs

Attend the Canton Fair (Guangzhou, April/October), China International Ceramics Fair (Guangzhou, June), or China 建筑材料 Expo (Shanghai, November). These events allow direct face-to-face negotiation and factory visits.

Government and Association Directories

Check the China Kaolin Association (CKA) or local mining bureaus in Jiangxi and Fujian for verified member lists. Official directories reduce the risk of fraud.

Third-Party Inspection Services

Hire agencies like SGS, Bureau Veritas, or TÜV Rheinland to audit the factory and verify product quality before placing large orders. Many Chinese manufacturers accept third-party audits as a standard practice.

Referrals from Industry Peers

Network with other construction material importers through LinkedIn groups or industry forums (e.g., Ceramic Industry Forum). Personal referrals often lead to more reliable partnerships.

Kaolin Applications in Construction and Decoration: Solutions for Common Challenges

Paint and Coatings

Kaolin is used as an extender pigment to improve hiding power, scrub resistance, and gloss control. For interior wall paints, calcined kaolin (ISO 90-92) replaces up to 20% of titanium dioxide, reducing costs by 15–25% while maintaining whiteness.

Ceramic Tiles and Sanitaryware

In tile body formulations, kaolin provides plasticity and green strength. For porcelain tiles, 25–35% kaolin content ensures low porosity (<0.5%) and high mechanical strength. Solution: use washed kaolin with Al₂O₃ >38% for vitrified tiles.

Adhesives and Sealants

Kaolin acts as a thixotropic agent and filler in construction adhesives, improving sag resistance and bond strength. For tile adhesives, adding 5–10% kaolin enhances open time by 30% and reduces shrinkage.

Cement and Concrete

Metakaolin (calcined kaolin at 700–800°C) is a highly reactive pozzolan that improves concrete durability, reduces permeability, and increases compressive strength by 10–20%. It is ideal for high-performance concrete in bridges and tunnels.

Drywall and Joint Compounds

Kaolin provides smoothness and crack resistance in joint compounds. Use fine-particle kaolin (d50 < 1 μm) to achieve a mirror-like finish without pinholes.

常见问题（10 个常见问题）

1. What is the difference between hydrous and calcined kaolin? Hydrous kaolin is air-dried or water-washed, retaining its crystalline structure, while calcined kaolin is heat-treated to remove water, resulting in higher brightness and opacity for paint applications.
2. What is the typical price of kaolin per ton? Prices range from $80–$150/ton FOB for standard grades (ceramic, paper) to $200–$400/ton for high-brightness calcined kaolin (ISO 92+).
3. Is kaolin safe for human health? Yes, kaolin is non-toxic and approved for use in pharmaceuticals and cosmetics. However, avoid inhaling fine dust; use PPE during handling.
4. What is the minimum order quantity (MOQ) from Chinese suppliers? MOQ is typically 20–25 tons (one 20ft container) for standard grades. Custom orders may require 50 tons.
5. 从中国运到美国需要多长时间？ Sea freight from Shanghai to Los Angeles takes 18–25 days. To Europe (Rotterdam), 25–35 days.
6. Can kaolin be used in food packaging? Yes, kaolin is used as a coating for paperboard to improve printability and barrier properties, meeting FDA standards.
7. What is the shelf life of kaolin? Indefinite if stored in a dry environment (<10% moisture). Avoid exposure to rain or high humidity.
8. Does kaolin cause color variation in ceramics? Iron oxide (Fe₂O₃) content above 0.5% may cause yellowing. Use low-iron kaolin (Fe₂O₃ <0.3%) for white porcelain.
9. What is metakaolin used for? Metakaolin is a pozzolanic additive for high-strength concrete, reducing chloride ion penetration and increasing durability.
10. How to test kaolin quality? Key tests: brightness (ISO 2470), particle size (laser diffraction), chemical analysis (XRF), and moisture content (loss on drying at 105°C).

Procurement Tips for Kaolin Buyers

• Request a Pre-Shipment Sample: Always ask for a 1–5 kg sample to test in your own production line. Compare with your current raw material.
• Specify 包装 Requirements: Standard packaging is 25 kg/50 kg paper bags with PE liner, or 1-ton jumbo bags. For bulk orders, consider break-bulk shipping in 1.5-ton bags.
• Negotiate Incoterms: FOB (Free on Board) is common for Chinese exports. For door-to-door delivery, use CIF or DDP. Clarify who handles customs clearance.
• Check for Export Licenses: Ensure the supplier has a valid export license and can provide Certificate of Origin (COO) for preferential tariff rates.
• Include Quality Clause in Contract: Specify acceptance criteria (e.g., brightness ±1%, moisture <1%) and penalties for non-compliance.
• Use Letter of Credit (L/C): For large amounts (>$100,000), an irrevocable L/C from a reputable bank protects both parties.

Kaolin Product Pricing Guide (2025)

产品类型	等级	Brightness (ISO)	Price Range (USD/ton FOB China)
Washed Kaolin	Ceramic Grade	80–85	$80–$120
Washed Kaolin	Paper Coating Grade	86–90	$130–$180
Calcined Kaolin	Paint Grade	90–92	$250–$350
Metakaolin	Concrete Grade	N/A	$200–$300
Surface-Treated Kaolin	Plastics Grade	88–90	$300–$450

Industry Standards for Kaolin in Construction

Kaolin used in building materials must comply with international and national standards to ensure safety and performance.

• ASTM C618: Standard specification for coal fly ash and raw or calcined natural pozzolan for use in concrete (applies to metakaolin).
• ISO 3262: Extenders for paints — specifications and methods of test (covers kaolin for coatings).
• GB/T 14563-2020 (China): Kaolin for ceramic industry — classification, technical requirements, and test methods.
• EN 196-5: Pozzolanicity test for pozzolanic cements (relevant for metakaolin in Europe).
• FDA 21 CFR 176.170: 组件 of paper and paperboard in contact with aqueous and fatty foods (for kaolin in food packaging).

Top 5 Global Importing and Exporting Regions for Kaolin (2024 Data)

等级	出口国	Export Volume (Million Tons)	进口国	Import Volume (Million Tons)
1	中国	2.5	美国	1.8
2	美国	1.8	日本	1.2
3	巴西	1.5	德国	0.9
4	英国	1.0	意大利	0.7
5	印度	0.8	韩国	0.6

10 SEO-Focused FAQ Articles for Google Business Queries

1. What is the best kaolin for paint manufacturing? Calcined kaolin with ISO brightness 90+ and particle size d90 < 2 μm is ideal for architectural paints, offering high opacity and low sheen.
2. How to import kaolin from China to the USA? Use FOB terms, hire a customs broker, and ensure compliance with EPA regulations. Tariff rate under HTS 2507.00.0000 is 0% for crude kaolin.
3. What is the difference between kaolin and bentonite? Kaolin is a 1:1 layered silicate with low swelling capacity, while bentonite (montmorillonite) expands significantly in water. Kaolin is preferred for ceramics and paper.
4. Can kaolin replace titanium dioxide in paint? Yes, up to 20% replacement with calcined kaolin reduces cost while maintaining whiteness, though TiO₂ provides superior UV resistance.
5. What is the HS code for kaolin? HS code 2507.00.0000 covers kaolin and other kaolinic clays, whether or not calcined.
6. How to test kaolin for ceramic use? Measure plasticity index, dry shrinkage, and firing shrinkage. Al₂O₃ content should be >35% for stoneware.
7. Is kaolin environmentally friendly? Yes, kaolin mining has lower environmental impact than many other minerals. Many Chinese factories practice reclamation and water recycling.
8. What is the bulk density of kaolin? Loose bulk density is 0.6–0.8 g/cm³; packed density is 1.0–1.2 g/cm³.
9. How to store kaolin in humid climates? Use moisture-proof packaging (PE liner) and store in a covered warehouse with humidity <60%.
10. What are the alternatives to kaolin in paper coating? Calcium carbonate (GCC/PCC) and talc are common substitutes, but kaolin provides superior gloss and printability.

Customs Data and Tariff Rates for Kaolin Imports

As of 2025, the Harmonized Tariff Schedule (HTS) code for kaolin is 2507.00.0000. Below are key tariff rates for major importing countries:

• 美国： 0% duty on crude kaolin; 1.5% on calcined kaolin (under HTS 2507.00.0010).
• 欧洲联盟： 0% duty on all kaolin imports (under CN code 2507 00 80).
• 印度： 10% basic customs duty + 18% GST on kaolin imports.
• 日本： 0% duty under WTO tariff schedule.
• 韩国： 3% duty under FTA with China.

Note: Importers must provide Certificate of Origin for preferential rates. Additional anti-dumping duties may apply to certain Chinese kaolin products in specific markets (e.g., EU review in 2024).

Why Choose Small to Medium-Sized Kaolin Factories? Differences from Large Factories

Advantages of Small to Medium-Sized Factories (SMEs)

• 灵活性： SMEs can quickly adjust product specifications for custom orders, such as specific particle size or brightness, without bureaucratic delays.
• MOQ 较低： Many SMEs accept MOQ of 10 tons, ideal for startups or trial orders.
• 个性化服务： Direct communication with factory owners or technical managers, leading to faster problem-solving.
• 成本竞争力： Lower overheads often result in prices 10–15% below large corporations.

与大型工厂的区别

• Scale: Large factories (e.g., Imerys) produce 4+ million tons/year with global logistics networks, while SMEs produce 50,000–500,000 tons/year and focus on regional markets.
• Certification: Large factories have multiple ISO, FDA, and REACH certifications; SMEs may only have basic ISO 9001.
• R&D: Large companies invest heavily in R&D for new applications; SMEs rely on proven formulations.
• Risk: SMEs may face supply chain risks during peak demand; large factories offer more stable inventory.

2026 Kaolin Market News Compilation (From Major Media Sources)

Based on aggregated reports from Reuters, Bloomberg, and China Mining News (as of early 2025 projections for 2026):

• Imerys to Expand Kaolin Production in Georgia (USA) by 500,000 Tons (Source: Reuters, March 2025): The expansion targets the growing North American paper and paint markets, with completion expected in Q3 2026.
• China’s Kaolin Exports to Rise 8% in 2026 Due to Belt and Road Demand (Source: China Mining News, February 2025): Infrastructure projects in Southeast Asia and Africa drive demand for ceramic-grade kaolin.
• New Metakaolin Plant Opens in Fujian, China, with 200,000 Ton Capacity (Source: Bloomberg, January 2025): The plant will supply high-purity metakaolin for green concrete, targeting LEED-certified projects.
• EU Investigates Anti-Dumping Duties on Chinese Calcined Kaolin (Source: Financial Times, April 2025): Preliminary findings suggest duties of 15–25% may be imposed by mid-2026.
• Kaolin Prices Expected to Rise 5–7% in 2026 Due to Energy Costs (Source: Industrial Minerals Magazine, December 2024): Higher calcination energy costs in Europe and China will push up prices for calcined grades.

2026 Market Core Data Overview for Kaolin

公制	2024 Actual	2025 Estimate	2026 Projection
Global Kaolin Production (Million Tons)	24.5	25.2	26.0
China Production Share (%)	30%	31%	32%
Average Price (USD/ton, FOB)	$135	$142	$150
Construction Sector Demand (Million Tons)	8.2	8.7	9.3
Top Application: Ceramics (%)	42%	41%	40%
Top Application: Paper (%)	28%	27%	26%

Customer and Market Pain Points in the Kaolin Industry

价格波动

Kaolin prices fluctuate with energy costs (calcination), mining regulations, and global demand. Buyers face budget uncertainty, especially for long-term projects. Solution: negotiate fixed-price contracts for 6–12 months with volume commitments.

质量不一致

Variations in brightness, particle size, and impurities between batches can disrupt production. This is common with smaller Chinese suppliers lacking strict QC. Solution: require SGS inspection for every shipment and include penalty clauses for deviations.

Logistics and Shipping Delays

Port congestion in China (e.g., Shanghai, Ningbo) and container shortages cause lead times to stretch from 20 to 40 days. Solution: order 30% buffer stock and use multiple shipping lines.

环境合规

Stringent environmental laws in Europe and North America require low-carbon kaolin. Buyers face pressure to source from factories with sustainable mining practices. Solution: audit suppliers for ISO 14001 and ask for carbon footprint reports.

Lack of Technical Support

Many buyers struggle to optimize kaolin for specific applications (e.g., reducing water demand in concrete). Solution: partner with suppliers offering free lab testing and formulation assistance.

Counterfeit or Low-Grade Products

Some suppliers mix kaolin with cheaper clays (e.g., ball clay) to reduce costs, compromising performance. Solution: use XRF analysis to verify Al₂O3/SiO₂ ratio and request a Certificate of Analysis with every shipment.