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Ground Calcium Carbonate, Storage Precautions And Benefits In Paper Industry



Ground calcium carbonate is a highly versatile and widely used material in various industries. Understanding the production, storage, and applications of ground calcium carbonate is essential for leveraging its benefits in industrial and commercial uses. This blog of TLD Vietnam will delve into the origins, production methods, and practical applications of Ground Calcium Carbonate in paper industry. 

Ground calcium carbonate – purity of 98.5% min

What Is Ground Calcium Carbonate?

Ground calcium carbonate is a white powder produced through physical methods from sources such as calcite, limestone, dolomite, chalk, and shells. It appears as a gray-white or dark brown granular solid, slightly acidic, with high purity and stable composition. This material is a crucial chemical raw material, extensively used in various industries, and serves as one of the most common fillers.

Raw Materials For Ground Calcium Carbonate Production

Ground calcium carbonate is derived from various natural sources, each with unique properties that influence the quality and characteristics of the final product. The primary raw materials used in the production of Ground calcium carbonate include:


Sedimentary rock
Image of Limestone

The calcium carbonate deposited in the lake and sea, after losing water, is compressed and cemented to form a rock called limestone. Its Mohs hardness is less than 3, which is a medium-hardness ore. Egypt, Pakistan, and several other countries have extensive limestone deposits, making it a primary raw material for heavy calcium carbonate production in these regions. material.


Calcite is also a calcium carbonate mineral, which is most commonly found in natural calcium carbonates. Therefore, calcite is a widely distributed mineral. Calcite has a variety of crystal shapes. Their aggregates can be clusters of crystals, or granular, massive, fibrous, stalactite, earthy, and so on.


Its main component is calcium carbonate, accounting for more than 50%. It comes in many colors and usually has a distinct pattern. The Mohs hardness is between 2.5 and 5. Because it has various colors and is very beautiful after polishing, it is also often used as a decorative material in the construction industry.


Chalk is a fine deposit of calcium carbonate, a variant of calcite. Originally formed deep in the ocean floor through the compression of tiny plankton that settled to the seafloor.

How Is Ground Calcium Carbonate Produced?

There are two main production methods for heavy calcium carbonate powder: the dry method and the wet method. Ground calcium powder below 2500 mesh is typically produced by dry grinding, while the production of ultra-fine ground calcium carbonate over 2500 mesh is primarily produced through wet grinding.

Dry grinding is a common method  today. It generally involves a processing system composed of crushing equipment, grinding equipment, and classification equipment to produce products of various particle sizes.

In contrast, the wet grinding process is more complex and requires more grinding aids. This method allows for obtaining particles with better dispersibility and finer particle sizes. However, the production cost of the wet method is higher compared to the dry method.

Storage Precautions For Ground Calcium Carbonate Powder

Storing ground calcium carbonate powder requires careful consideration to maintain its quality and prevent contamination or degradation. Here are some key precautions to take:


Because heavy calcium carbonate is a powder, it has a high tendency to absorb moisture. Therefore, it is essential to implement effective moisture-proof measures.

Away from acidic substances

Since heavy calcium powder is composed of calcium carbonate, it should be stored away from acidic substances.  Because the two are likely to have a chemical reaction, affecting the efficacy of calcium powder.

Avoid high temperature

In the case of high temperature, calcium powder is easy to decompose, which will reduce the effect of heavy calcium. Therefore, the ground calcium carbonate powder should be placed in an area out of direct sunlight.

Ground Calcium Carbonate Powder Application In Paper Industry

In the paper industry, ground calcium carbonate is valued worldwide for its high brightness and light scattering characteristics. It is used as an inexpensive filler to make bright opaque paper. Over the past few decades, the use of calcium carbonate has grown significantly as the paper industry has transitioned from acid to neutral sizing. Today, calcium carbonate is the most widely used mineral in paper-making.

Calcium carbonate powder are commonly used in many types of paper, such as fillers inside the paper structure as well as a coating on the surface. It help create high whiteness and neutralize acid environment in the paper industry.
In fillers and coating quality, it contributes to whiter paper products, with opacity, gloss, good printing capability, and competitive prices. Moreover, it reduce the amount of wood, decrease costs while ensuring the durability of paper. 

TLD Vietnam- A Reliable Supplier Of Ground Calcium Carbonate

At TLD Vietnam, we prioritize quality at every step of our production process of ground calcium carbonate. Our commitment to excellence is reflected in our investment in the latest quality control machinery sourced from reputable brands in China, the United States, and the United Kingdom.  We adhere to stringent quality control measures, ensuring consistency and meeting international standards such as ISO, Reach, and RoHS. Our rigorous processes guarantee that every product leaving our facilities meets the highest quality benchmarks, providing our clients with confidence and trust in our brand.

Moreover, TLD Vietnam takes immense pride in our Calcium Carbonate production facilities. With a total area of 45,950 m2/ 494,602 f2 across our five advanced factories, we boast a robust monthly capacity of 30,000 MT.

Our commitment to excellence is mirrored in our use of the latest production facilities, including Ball Mill, Roller Mill, Hydraulic mill, and coating machines sourced from top manufacturers in Germany, Taiwan, and China. These state-of-the-art machines ensure the highest quality standards and optimal production efficiency. We are dedicated to delivering premium Calcium Carbonate products tailored to meet diverse industry needs, contributing to our position as a trusted leader in the market.

In Conclusion

Ground calcium carbonate is a critical material in various industries, with extensive applications, particularly in the paper industry. Understanding its origins, production methods, and storage precautions helps maximizing its benefits and maintaining its quality for industrial and commercial uses.


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