Selecting the Right Types of Kaolin Clay for Your Application

The process of choosing the right type of kaolin clay can be quite challenging at times. It has to be noted that there are certain characteristics required for different uses. As specialists, we are fully aware of the problems that you might face when choosing something.

Pairs Horses Chemical are exported all over the world and different industries with quality first. Our belief is to provide our customers with more and better high value-added products. Let's create a better future together.

A disadvantage is that if the wrong type of clay is chosen this will lead to the production of poor quality goods. You must establish the kind of clay you need and the properties associated with it to achieve the best outcomes according to your needs. As for the types of kaolin clay, many industries still need to be convinced which are the most useful.

As a kaolin clay manufacturer, we understand your need to acquire high-quality and efficient raw materials. The right choice of kaolin clay will positively influence the productivity of your product and its lifespan. 

In the following blog, you will learn how to choose the right kaolin clay. We are here for your help in selecting the best kaolin clay for your desired uses.

Understand the Types of Kaolin Clay

Selecting the right type of kaolin china clay is essential for your application. Different types offer unique benefits. Here are the types of kaolin clay and their key properties.

Hard Kaolin

Hard kaolin clay is a natural clay that has a small particle size. It is seldom less than two micrometers in diameter. 

• It is employed as a bulking agent and reinforcement agent for elastomers and latexes.
• Enhances the rigidity, tensile strength, and also the surface abrasion resistance of rubber materials.
• Improves the rubber products’ modulus thus increasing the products’ strength.

Hard kaolin clay is also known as kaolin reinforcing filler. It is best for the rubber industry.

Calcined China Clay

Calcined china clay commonly referred to as metakaolin is a white powder that is non-plastic. It is made from natural kaolin through a process of calcination, which is heating at very high temperatures. Chemically bound water molecules are also removed in this process.

• It is employed in glazes to decrease the overall shrinkage that happens in the drying as well as the firing stages.
• Used widely in the paper industry to enhance the brightness and to give a smooth surface.
• Improves the strength and longevity of ceramic-based goods.

This type of kaolin clay can be used in many industries as it is multipurpose. 

Applied in coatings, paints, and rubber, calcined kaolin is a kaolin that has been heated to improve its characteristics.

Water-Washed Kaolin

Hydrous clay also called water-washed kaolin is the process of refining kaolin with water. This process yields a slurry that has to be treated to eliminate unwanted particles.

• They have 14% of bound water of hydration and retain all the original characteristics.
• Suits the creation of high-quality porcelain, given its level of purity.
• It has applications in the paper industry, rubber industry, paint industry, and coating industry.

This type of kaolin clay provides high brightness and is pure. 

Each type of kaolin clay serves specific purposes. Choose the right type for optimal results.

Evaluate Key Properties

High-brightness kaolin is essential for applications like paper and cosmetics. Fine particle size is crucial for smooth textures in paints and cosmetics. High-purity kaolin ensures superior quality and performance in pharmaceuticals and cosmetics.

• Kaolin clay manufacturers provide kaolin with specific properties for diverse industrial needs.
• Plasticity is important for ceramics and other molded products, enhancing workability.
• High brightness improves the visual appeal and effectiveness of paper and ceramics.
• For paints and coatings to have smooth textures, fine particle size is essential.
• The benefits of kaolin clay include improved product strength, durability, and smoothness.

Think about kaolin clay’s brightness, purity, plasticity, and particle size when assessing it. Its adaptability to various uses is determined by these characteristics, which guarantee top quality and performance in paint, ceramic, and paper products.

Determine Your Application Requirements

Understanding your specific needs is essential for choosing the right china clay. Different applications require different properties. Here are the key factors to consider.

Paper Industry

Kaolin is essential in paper filling and coating, improving quality and reducing costs. It enhances paper brightness, smoothness, and opacity, making it a key component in the paper industry. In both filling and coating, kaolin clay provides numerous benefits that enhance the final product.

• Paper filled with kaolin clay is bright, smooth, and has high opacity.
• Used as a filler, it reduces production costs and enhances paper brightness.
• High-brightness kaolin is vital for paper coating, requiring over 90% GE brightness.
• Kaolin clay manufacturers supply both calcined and hydrous kaolin for various paper applications.

Calcined and hydrous kaolin clay is best suited for the paper industry.

Ceramics

Kaolin is highly valued in ceramics for its plasticity and strength, essential for molding and firing. It ensures smooth textures and workability in clay bodies.

• Using Kaolin clay in ceramics provides outstanding thermal stability when fired.
• It maintains color stability, which is crucial for aesthetic ceramic products.
• Used in sanitaryware, tableware, tiles, and electrical porcelains.
• Offers high workability, rheology, and mechanical strength in various shaping methods.

To produce high-quality ceramics, you need clay with good dry strength, excellent particle packing, and outstanding whiteness. This type of clay, combined with high plasticity and strength, ensures superior ceramic products. Calcined kaolin is often the best choice for ceramics.

Paints and Coatings

Calcined kaolin is the most commonly used type in paints and coatings. It adds desired rheological properties, maintaining dispersion and providing body to the product.

• Reduces the consumption of expensive pigments like titanium dioxide (TiO2).
• Enhances processing, storage, and application properties of the paint film.
• Provides good dispersibility and particle size distribution for a smooth finish.
• Kaolin clay uses include acting as a filler and pigment in paint formulations.

Kaolin is suitable for architectural paints, especially non-gloss interior wall products. Its hydrophilic characteristic makes it ideal for emulsion paints. It matches the particle size of titanium dioxide, simplifying precise paint formulations.

Rubber

Kaolin clay is crucial in rubber for its reinforcing properties and abrasion resistance. It improves the stiffness, tensile strength, and modulus of rubber compounds. Water-washed grades are used in extrusions due to freedom from grit.

• Kaolin clay used in rubber provides high abrasion resistance for non-black rubber goods.
• Calcined kaolin is used in heavy-duty insulation rubber for enhanced durability.
• Soft kaolin grades are used in household products, toys, and rubber clothing.
• Surface-treated kaolin is increasingly in demand in rubber for specific applications.

Air-floated hard kaolin is commonly used in rubber, contributing to its mechanical properties and longevity.

Consult the kaolin clay manufacturer for detailed specifications. Ensure the chosen kaolin clay meets all your application requirements.

Conclusion

At The Sharad Group, we offer high-quality levigated kaolin clay made in modern facilities. Our products cater to diverse industries, ensuring superior performance and reliability.

• Kaolin china clay manufacturers like us guarantee top-grade materials for various applications.
• We use state-of-the-art technology for advanced mineral processing.
• With 64 years of experience, we provide consistent and trusted products.

Choose The Sharad Group for your kaolin clay needs. Our experts can aid you in selecting the best type of kaolin clay for your application. Trust us for high-quality, reliable kaolin clay solutions tailored to your requirements.

If you’ve experimented with bentonite clay as part of your natural skin care and beauty routine but you’re looking for something a bit milder, then kaolin clay may be the perfect option.

What is kaolin clay used for? This versatile clay can be used as a mild cleanser, gentle exfoliator, natural acne blemish treatment and teeth whitener, in addition to potentially helping deal with diarrhea, ulcers and certain toxicities.

It’s chock-full of minerals and detoxifying ingredients, yet it’s gentler and less drying than many other clays.

Let’s take a look at what kaolin clay is, where it’s found, and how you can use it on your skin, hair, teeth and more.

What is kaolin clay?

Kaolin clay is a type of clay primarily made up of kaolinite, which is a mineral that is found all over the earth. It’s also sometimes called white clay or China clay.

Kaolin was named after a hill in China called Kao-ling, where this clay was mined for hundreds of years. Today, kaolinite is mined from many different locations around the world, including parts of China, the U.S., Brazil, Pakistan, Bulgaria and elsewhere.

It forms most abundantly in soils that have formed from the weathering of rocks in hot, humid climates, such as those in rain forests.

This clay is soft, usually white or pink, and made up of tiny crystals of minerals, including silica, quartz and feldspar. It also naturally contains the minerals copper, selenium, manganese, magnesium and zinc.

However, it isn’t usually ingested for its nutrient content. Rather it’s taken to treat gastrointestinal problems or more often applied topically to the skin.

Additionally, kaolinite and kaolin pectin are also used in pottery and ceramics and in the manufacturing of toothpaste, cosmetics, light bulbs, china dishware, porcelain, some types of paper, rubber, paint and many other industrial products.

Contact us to discuss your requirements of Green Iron Oxide Pigment. Our experienced sales team can help you identify the options that best suit your needs.

There are several different types and colors of kaolin clays available, including:

• While this clay is usually white, kaolinite can also be a pink-orange-red hue due to iron oxidizing and causing rust. Red kaolin clay indicates that there are high levels of iron oxide near where it is found. This type is most suited for people wanting to prevent signs of aging.
• Green kaolin clay comes from clay that contains plant matter. It also has high levels of iron oxide. This type is usually most drying and best for people with acne-prone or oily skin.

Benefits

1. Mild and non-irritating when applied to sensitive skin, hair and teeth

Kaolin is suited for nearly all skin types and is considered one of the most gentle clays available. In fact, one assessment showed that as part of a clay mask, it helped control oiliness without excessively drying the skin, and it may be suitable for oily or acne-prone skin.

Accordingly, you’ll find it in products such as facial masks and scrubs that help cleanse and exfoliate the skin, leaving behind a smoother, more even skin tone and texture.

Since it is gentle, it makes a suitable mild cleanser and detoxifying treatment for sensitive skin.

Kaolin also has an appealing pH level that is close to the pH of human skin. This means that it typically isn’t irritating and is a good product for those with sensitive, delicate or dry skin.

You can also apply kaolin to your hair and scalp to help with cleansing and reducing irritation without drying your hair out. Similarly, it can be used in the mouth to help clean the gums and whiten the teeth.

2. Can help manage acne and signs of inflammation

According to a report, natural clays have been used to treat skin infections since the earliest recorded history. Clays have natural antibacterial properties and can kill a broad spectrum of human pathogens that cause skin rashes and acne.

As shown above, kaolin can aid acne issues. Because it absorbs excess oil and dirt from the skin, it helps clean out pores and prevent blackheads and breakouts.

Some also find it to be soothing and that it can help reduce redness and signs of inflammation.

You can even use it to exfoliate acne-prone skin without worsening irritation. Using it about twice weekly to exfoliate should leave behind softer, smoother, brighter skin that is less oily.

3. May help reduce signs of aging

For those who are looking to prevent signs of aging, such as fine lines and wrinkles, kaolin clay may help tone and tighten the skin.

There’s some evidence suggesting that it can help improve skin elasticity and firmness due to its ability to remove dead skin cells and flaky, dry skin. The iron found in kaolin clay, especially in red types, is thought to help contribute to its ability to soften skin and fight damage.

It can also improve the overall tone and evenness of skin by decreasing dark spots, redness and signs of irritation due to bug bites, rashes, poison ivy, etc.

4. Potentially helps GI Issues like diarrhea and stomach ulcers

Kaolin pectin, a liquid preparation of kaolinite plus pectin fiber, can be used to treat diarrhea and internal sores or stomach ulcers within the digestive tract. It’s believed to work by attracting and holding on to bacteria and germs that can cause diarrhea.

A systemic review and meta-analysis showed evidence of superiority to placebo in reducing the diarrhea.

The most common industrially produced kaolinite preparations for treatment of diarrhea include attapulgite and bismuth subsalicylate (the active ingredient in Pepto-Bismol). Other brand names sold in the U.S. include Kaodene NN and Kapectolin.

Another traditional use of this clay has been soothing upset stomachs. In some parts of the world, historically people have used kaolinite internally to suppress their appetite and support detoxification.

5. Helps with blood clotting

Certain types of kaolin are used to help accelerate blood clotting and to stop dangerous bleeding. For example, the Naval Medical Research Institute in the U.S. uses kaolinite-derived aluminosilicate infusions in certain types of gauze treatments to help treat wounded soldiers.

How to use

Purchasing dry or powdered kaolin clay allows you to make your own natural skin cleansers, facial masks and scrubs at home. You can also look for pre-made products made with kaolinite, or you can add kaolin to your favorite cleansers.

To make your own skin care products using kaolin, combine the smooth clay with a small amount of water to make a paste that is easier to work with. Within the paste there are tiny crystals that help exfoliate, clean and refresh the skin by combining with oil, impurities and dead cells that can then be removed.

The amount of water you need to add depends on the size of the kaolinite particles and the exact chemicals that may be present in the kaolin. Read directions carefully to determine the ratio that is best.

Start with a small amount of water, and increase as needed. You’re looking to form a thin paste-like consistency that is thick enough to slather on your skin.

Here are various DIY uses for kaolin clay:

• Using it on your face. Apply kaolin to damp skin, and rub it in gently. Let it seep into your skin for about five to 10 minutes before rinsing with warm water.
• In the bath. Add two pounds of kaolin clay plus two pounds of Epsom salt to a warm soaking bath to simultaneously treat your skin and unwind. You can also add essential oils, such as lavender oil, to further boost relaxation and skin health.
• On your hair. Make a paste using kaolin, and then apply it to your scalp and roots. Let it sit on your hair for about five minutes before rinsing well and conditioning.
• For dental health. Add a small amount of kaolin clay to your toothpaste to help cleanse your gums and whiten your teeth by removing plaque. Be sure not to swallow the clay, and rinse well afterward.

Kaolin pectin may also be used internally, with caution. It’s taken by mouth in the form of a liquid suspension, often to help control diarrhea in adults (but often not children). It can be taken with or without food.

It’s recommended that you take it within one to two days of diarrhea beginning for the best results. It usually only needs to be taken for about 24 hours or less.

For adults, the usual dose is four to eight spoonfuls (60 to 120 milliliters) taken after each loose bowel movement. It works best when you drink plenty of fluids with it and eat a non-irritating, bland diet for several days.

Always check with your healthcare professional before using.

Kaolin clay vs. bentonite clay

What is the difference between kaolin clay and bentonite clay?

One of the most important differences between these two clays, both of which are used to make facial masks and other beauty/skin treatments, is their pH levels. Bentonite has a higher pH than kaolin, which means it tends to be gentler and less irritating.

Bentonite also absorbs more water than kaolinite, which means it can be more drying. This makes kaolin a better choice for people with sensitive, dry or damaged skin, while bentonite may be a better choice for very oily skin.

Risks and side effects

Is kaolin clay safe for skin? Overall it seems to be non-toxic and safe for most people to use topically in small amounts.

It can potentially be risky to get kaolin powder into the eyes, and it shouldn’t be applied to open wounds. You should also avoid using it if you’ve ever had an allergic reaction to other facial clays.

If taking kaolin pectin internally, get your doctor’s advice first. Report any side effects, including constipation, fever, tiredness, lack of appetite or not being able to have a bowel movement.

Be careful about combining kaolin pectin products with other medications, including antibiotics and laxatives.

Certain forms of kaolinite can be dangerous to breathe in in high amounts. In the U.S., the Occupational Safety and Health Administration has set the legal limit of safe kaolin exposure in the workplace as 15 mg/m3 total exposure and 5 mg/m3 respiratory exposure over an eight-hour workday.

Other authorities feel that the safe limit should be even lower, at 10 mg/m3 total exposure per day.

Conclusion