Premium Heat-Treated Clay

Calcined Kaolin

Al2O3·2SiO2

Thermally processed kaolin with enhanced brightness, opacity, and performance — the premium white pigment for demanding applications.

94%+ Brightness
Calcined
Non-Toxic
ISO Certified
Request Quote View Grades
12+Grades
8+Industries
35+Countries
25+Years
Calcined Kaolin - 20 Microns
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Product Overview

About Calcined Kaolin

Understanding the fundamentals of calcined kaolin

Product Overview

Enhanced Through Calcination

Calcined Kaolin is produced by heating kaolin to 650-1050°C, driving off water and transforming it into a high-performance functional filler with superior brightness and opacity.

The calcination process creates metakaolin, which offers enhanced whiteness, improved hiding power, and better reinforcement properties compared to hydrous kaolin.

Flash Calcined Soak Calcined Metakaolin
Al2O3·2SiO2

Chemical Formula

Calcined Kaolin

Chemical Properties
  • Al2O3 Content42-45%
  • SiO2 Content52-55%
  • LOI<1%
  • pH Value5.5 – 7.0
Physical Properties
  • Mohs Hardness3
  • Brightness92 – 97%
  • Specific Gravity2.50 – 2.63
  • Oil Absorption45 – 65
94%+
Brightness
0.5-2μm
Particle Size
<1%
LOI
ISO
Certified

Clean Technology

Processed using clean calcination technology.

Non-ToxicClean ProcessSustainable
Calcined kaolin production facility
Advanced Processing

From Raw Kaolin
to Premium Calcined Product

Precision-calcined in state-of-the-art facilities for maximum brightness and consistency.

1050°CMax Calc. Temp
25+Years Experience
3+Calcination Plants
Maximum brightness
Enhanced opacity
TiO₂ extender
Consistent quality
Premium grade
Advantages

Key Benefits

Why calcined kaolin is the preferred choice for industry leaders worldwide

01

Superior Brightness

Calcination enhances brightness to 94%+ for premium white applications.

02

Enhanced Opacity

Excellent hiding power and opacity, serving as a TiO₂ extender.

03

Chemical Stability

Dehydration creates a stable, inert structure resistant to chemicals.

Calcined
94%+Brightness
6Key Benefits
8+Industries
04

Low Moisture

Less than 1% LOI ensures compatibility with moisture-sensitive systems.

05

Improved Hardness

Calcination increases hardness for better scrub and abrasion resistance.

06

Better Electrical Properties

Enhanced dielectric properties for electrical and cable applications.

Industrial manufacturing excellence
World Class Quality

Industry-Leading Performance
at Every Scale

Trusted by leading manufacturers across 50+ countries for consistent, high-purity calcined kaolin that meets international standards.

ISO 9001 EcoVadis Gold REACH Compliant Lab Certified
ISO Certified
Global Supply
Lab Tested
Industry Leading
Product Range

Available Grades

Comprehensive range of calcined kaolin grades for diverse industrial applications

Precision quality testing of calcined kaolin grades

Precision Engineered Grades

Every grade is meticulously tested in our state-of-the-art laboratories to meet the most demanding industrial specifications worldwide.

Brightness94%+
Particle Size0.5-2μm
LOI<1%
CertifiedISO
Most Popular
Premium

Paint & Coating Grade

TiO₂ Extender

High brightness calcined kaolin for TiO₂ extension and premium paint applications.

  • 94%+ Brightness
  • TiO₂ extension
  • Premium finish
Learn More
Paper

Paper Grade

High Opacity

Enhanced opacity calcined kaolin for paper coating and specialty applications.

  • High opacity
  • Gloss development
  • Print quality
Learn More
Plastic

Plastic Grade

Reinforcing

Calcined kaolin for polymer reinforcement and electrical applications.

  • Good reinforcement
  • Low moisture
  • Electrical grade
Learn More
Rubber

Rubber Grade

Semi-Reinforcing

Calcined kaolin for rubber compounds requiring improved whiteness.

  • Improved whiteness
  • Semi-reinforcing
  • Processing aid
Learn More
Product Statistics
4Grade Categories
12+Product Variants
0.5-5Micron Range
Request Custom Grade
ISO 9001 Certified Global Delivery Technical Support Custom Solutions
Applications

Industries & Applications

Versatile applications across diverse industry verticals worldwide

Paints & Coatings

Paints & Coatings

Premium extender for TiO₂ and functional filler in high-performance coatings.

DecorativeIndustrialArchitectural
30%TiO₂ Extension
Paper Industry

Paper Industry

Coating pigment for enhanced opacity, brightness, and print quality.

CoatingSpecialtyPackaging
94%Brightness
Plastics

Plastics

Reinforcing filler for engineering plastics and wire & cable compounds.

PVCEngineeringCable
15%Loading
Rubber

Rubber

Semi-reinforcing filler for white and colored rubber compounds.

White GoodsFootwearMolded
20%Loading
Electrical

Electrical

Dielectric filler for electrical insulation and cable compounds.

CableInsulationElectronic
LowConductivity
Adhesives & Sealants

Adhesives & Sealants

Reinforcing filler for adhesive and sealant formulations.

ConstructionIndustrialAutomotive
25%Loading
8+Industries
12+Applications
35+Countries
400+Customers

Need a Custom Solution?

Our experts help you find the perfect grade

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Our Promise

Why Choose 20 Microns?

World-class quality minerals backed by decades of expertise & innovation

20 Microns state-of-the-art manufacturing facility

Years of
Excellence

ISO 9001
Calcined
Premium
Certified

Our calcined kaolin is produced in modern calcination facilities with precise temperature control to deliver consistent brightness, opacity, and performance.

Precision Calcination

State-of-the-art calcination technology

Maximum Brightness

Industry-leading 94%+ brightness

Consistent Quality

Batch-to-batch reliability

Technical Support

Expert application assistance

Start Your Journey With Us
Key Metrics
3+Calcination Plants
35+Countries Served
400+Happy Customers
25+Years Experience
EcoVadis Gold Sustainability Rating
1050°CCalcination
R&DInnovation
24/7Logistics
ExpertSupport
Knowledge Base

Frequently Asked Questions

Get answers to common questions about Calcined Kaolin

Knowledge Center

Find detailed answers about specifications, applications, and technical details.

4Questions
24/7Support
TechnicalApplicationsGradesQuality

Still Have Questions?

Our team is here to help

Contact Us
01

What is calcined kaolin?

Calcined kaolin is thermally processed kaolin heated to 650-1050°C to remove water and enhance brightness, opacity, and performance properties.

Heat Treated Enhanced Premium
02

How does it extend TiO₂?

Calcined kaolin partially replaces expensive titanium dioxide while maintaining opacity and whiteness, reducing formulation costs by up to 30%.

Cost Saving Opacity Performance
03

What is the difference from hydrous kaolin?

Calcined kaolin has higher brightness (94%+), lower moisture (<1% LOI), and improved hardness compared to hydrous kaolin.

Brighter Drier Harder
04

What applications benefit most?

Premium paints, paper coating, electrical cable compounds, and any application requiring high brightness and opacity benefit most from calcined kaolin.

Paints Paper Cable

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Our technical experts are available to provide detailed answers

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Industry Applications

Product Applications

Calcined Kaolin serves as a critical input across diverse industrial sectors worldwide

01

Paints & Coatings

TiO₂ extender and premium white pigment.

02

Paper Coating

High opacity coating pigment.

03

Plastics

Reinforcing filler in polymers.

04

Rubber

Semi-reinforcing white filler.

05

Electrical

Dielectric insulation filler.

06

Adhesives

Performance enhancer in bonding.

07

Construction

Additive for cement products.

08

Cosmetics

Absorbent in personal care.

8+Application Sectors
12+Product Grades
35+Countries Served
400+Industry Clients
Calcined Kaolin industrial applications worldwide
Global Industrial Reach

Powering Industries Across
50+ Countries

From cosmetics to oil & gas — calcined kaolin is the essential mineral behind thousands of products you use every day.

Need a Specific Grade for Your Application?

Our experts will guide you to the perfect calcined kaolin solution

Request Expert Consultation
Product Video

See It In Action

Watch how 20 Microns' Calcined Kaolin powers real-world industrial applications

Calcined Kaolin in Action – 20 Microns
YouTube
Official Product Film

Calcined Kaolin - Premium Processing

20 Microns Limited · Official Channel

About This Video

Discover how 20 Microns' Calcined Kaolin grades deliver superior performance across industrial applications.

  • Product manufacturing overview
  • Quality control processes
  • Application demonstrations
  • Global supply capabilities
Watch on YouTube

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Calcined Kaolin

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