Mikrokal Calcite Areas of Calcite

Calcium carbonate has a lot of special properties, which makes it a suitable raw material for a wide range of different application areas. The coated calcite produced by Mikrokal Limited Company and used especially in plastic and cable sectors as a filling material ranges first within the sector as it  gives hydrophobic property to the material, makes the chemical paint disperse easily and fit organic environments and keeps the forms from heating up in PVC sector.

Mikrokal Calcite Practice Areas

CaCO₃ in Paint and Surface Coatings

    Advantages of calcite are as follows:


    • It solidifies.
    • It controls the viscosity.
    • It lowers the cost by reducing the consumption of titanium dioxide.
    • It enhances opacity due to its high whiteness property.
    • It strengthens.
    • It increases the impact resistance of the paint film.
    • It gives brightness to the paint.
    • It prevents the paint films to peel off.
    • It provides a smooth film surface.
    • It has an ultra-hiding power.
    • It has a high dispersion feature.
    • It provides brightness due to its broad surface area.
    • It isn’t harmful to health.
    • It has a low oil intake incidence.
    • It provides efficient wear protection.
CaCO₃ in Plastic Sector

    Some advantages of the calcite over the plastics are as follows:

    • Depending on different chemical surface coating, it provides dop oil saving.
    • It provides pigment saving due to its high whiteness.
    • It has a flame retardant property due to its chemical structure.
    • It increases the writability of the packing materials.
    • It has a positive effect on notched impact strength.
    • It has a regulatory impact on the viscosity in polymer.


    The micronized calcite used as a filling material in plastic sector

    • Must control the rheological properties of PVC plastisols,
    • Must not include heavy metals causing polymers to age,
    • Must have high chemical purity,
    • Must have high whiteness for saving expensive white pigments,
    • Ground particles must not gather together and agglomerate again,
    • Must not intake high amount of oil,
    • Must not absorb the flux oil or the chemical substances used in the formulation,
    • Must have a high rate of whiteness for saving expensive white pigments and dyeability at high filling levels,
    • Must disperse easily,
    • Must not cause machines to be worn,
    • Must have homogeneity,
    • Must enhance hardening, the structural properties of the final product, impact resistance, stability and resistance against ageing,
    • Must protect against heating up due to its solidifying effect,
    • Must prevent blocking on broken film surfaces,
    • Must be scentless, tasteless and non-toxic.


    However, as calcite is an inorganic mineral and it has a surface potential difference with the organic polymers, the way of coating calcite in order to provide better physical values has appeared as one of the most common ways of reducing the cost. In this regard, ground calcium carbonate is exposed to the coating processes with stearic acid at different levels and coated calcite is produced.

    Some advantages of coated CaCO₃ over plastics are:

    • The hydrophobic structure,
    • Low surface energy,
    • Easy dispersal property,
    • High homogeneity,
    • High resistance,
    • More bright and smooth surfaces,
    • Low magnitude of machine wearing,
    • High machine efficiency.
CaCO₃ in Construction Chemicals Sector

    Niğtaş micronized products are used as a filling material which enhance the physical and chemical properties of many products in construction sector.

    • It has high whiteness.
    • It is an agent.
    • It has standard particle distribution on AFS scale.
    • It is a color carrier.
    • It increases the bonding strength.
    • It cuts the time of drying.
    • It is used often as it provides economic formulation.
CaCO₃ in Paper Sector

    Calcite as a filling and coating pigment in paper production has outstanding services in the sector due to the following reasons:

    • High whiteness,
    • Proper refractive index,
    • Proper granulation,
    • Absorption by the paper at high levels,
    • Insoluble in water,
    • Chemically nonreactive,
    • Not being eroded easily,
    • Cost effective.


    Niğtaş micronized calcite has a technology of producing particles at nano level to be used as a filling or coating material in paper and adds many properties to the paper because our micronized and nanometric products are high dispersible and resistant to erosion. Calcite,

    • increases the opacity of the paper.
    • fills in the blanks between the fibers and makes a smooth surface.
    • makes the paper printable with the smooth surface.
    • stabilizes the paper dimensions.
    • increases the paper softness.
    • helps the ink being absorbed better vertically and increases the printing quality.
    • slows the aging of the paper.
    • provides fullness in the paper.
    • helps the paper in absorbing the ink well.
    • helps the ink being distributed horizontally on the paper.
    • gives whiteness and brightness to the paper.


    Recently, it has substituted for kaolin due to the following advantages in the paper sector:

    • Calcite could be prepared at lower costs. Along with the reduced cost, it protects the mechanical characteristics of the paper and enables a wide use of filling material,
    • Calcite smoothens and increases the whiteness of the coated surface,
    • decreases the use of materials such as kaolin, pulp and fluorescent whitening agent,
    • increases the porosity ration of high quality writing paper without loss of paint brightness,
    • Papers made of calcite protect their whiteness for a long time,
    • It is not exposed to environment pollution created by acid-containing media which is left because of the work in a neuter system.
CaCO₃ in Glass Sector

    Calcite is used as a raw material in glass production. In this context, main materials compounding the glass must be initially refined and ground well and at proper levels.

    Calcite of Niğtaş has a low amount of iron oxide so that it doesn’t cause the glass to be discolored.


    • increases the chemical resistance of the glass.
    • Limestones including metal oxide are used as raw material in glass production.
    • saves energy in glass cookers.
    • increases the rigidity of the glass.
    • is cost effective.
    • is thought to be useful for increasing transparency.
CaCO₃ in Plaster Sector
    • It reduces execution cost as a filling mineral.
    • It increases the penetrability of the plaster. As the plaster has a sticky structure, it cannot proceed with the spire and sticks. Calcite eases this process for machine plaster and helps pulverize.
    • It prevents the plaster to freeze early.
    • It gives softness to the plaster.


    Calcite to be used in plaster sector;

    • must have high impurity,
    • must fit particle size distribution and shape,
    • must have low moisture content,
    • must have high whiteness. 
CaCO₃ in Other Sectors

    Calcite, also the ground calcite as a natural calcium carbonate is a raw material input in producing food, medications, cosmetics, in forage sectors and in manufacturing ceramics, carpet backing and wax cloth.

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