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Coating Pigment

What Is Coating Pigment?

Coated pigments, also known as surface-treated pigments or encapsulated pigments, are specially treated pigments whose surface is covered with one or more layers of materials. This treatment can improve the properties of the pigment, such as dispersion, weather resistance, chemical resistance, gloss and color stability. Coated pigments are widely used in coatings, plastics, inks, papermaking, textiles and ceramics.

Advantages of Coating Pigment

Tinting strength
The color of a paint pigment depends primarily on its chemical structure, and when light hits the pigment surface, it absorbs and reflects different wavelengths.

Heat resistance
Depending on the coating application, it is important to consider the pigment's reaction to temperature. In general, paint pigments are more soluble at higher temperatures, so color differences may occur. Pigments with a highly crystalline structure are generally more heat resistant than polymorphic pigments, and different crystalline modifications may react differently to heat. In general, inorganic pigments are more thermally stable, but yellow iron oxide is an exception, which loses water from its crystals at high temperatures.

Light resistance
Light is a factor that affects the behavior of pigments in coatings. Some inorganic pigments do not change when exposed to light, but most pigments, especially organic pigments, may darken or completely fade. The light resistance of a pigment is affected by chemical composition, pigment concentration, crystal modification, and particle size distribution. In addition, environmental factors can greatly affect the results, such as the presence of water and chemicals in the atmosphere or in the coating system.

Weathering stability of paints for outdoor coatings
Weathering stability depends on the required outdoor performance (shelf life, climate zone…), pigment concentration, the presence of titanium dioxide (which may reduce or accelerate fading depending on the grade used) and the concentration and type of light stabilizer used.

Insolubility
The pigment must be insoluble in the carrier (the medium in which the pigment is dispersed) and must not react with any of the coating ingredients. Once in the dry film, the pigment must also be unaffected by the substrate and the media it comes into contact with, including water (which may be present in the form of condensation) or acidic industrial environments. Under certain conditions, the pigment may become soluble and cause application problems.

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Why Choose Us

Our company

Henghao technology development (hangzhou) co., ltd. Was established in 2003, headquartered in pigment and powder division, with independent r&d laboratories and production bases, and joint research and development with universities, always mastering cutting-edge technology and maintaining market competitive advantage.

Product applications

The products are used in plastics, inks, coatings and other fields, covering organic pigments such as azo and lakes, inorganic pigments such as lead and chromium, fluorescent pigments, etc., as well as non-metallic material powders such as magnesium hydroxide.

Our certificates

The products pay attention to safety, implement cleaner production, energy conservation and emission reduction, strictly control heavy metals and toxic substances, and can provide sgs reports and msds.

Quality control

The quality control system is perfect, from raw materials to finished products are systematically tested according to the application method, raw material testing and production process control are carried out in the factory, and the test is applied again in an independent laboratory before delivery, and double inspection ensures product quality.

Types of Coating Pigment

Paint pigments are mainly divided into two main groups according to their chemical structure: inorganic pigments and organic pigments.

Inorganic pigments, based on minerals (usually metals and metallic salts), have been used since ancient times. They were already used by our ancestors for cave painting in their caves. Compared to organic pigments (whose use is much more recent) they offer higher opacity and better light fastness, both weather and high temperature resistance. They are also generally less expensive than organic pigments. However, the latter offer more vivid colours.

However, advances in technology nowadays allow us to obtain paint pigments with better properties than those that would correspond to their chemical nature.

There is a standard classification for pigments: the colour index. Pigments are thus grouped according to their colour: Blue Pigments (PB); Black Pigments (PBk); Brown Pigments (PBr); Green Pigments (PG); Orange Pigments (PO); Red Pigments (PR); Violet Pigments (PV); Yellow Pigments (PY); White Pigments (PW). This index depends on the chemical nature of the pigment which determines its performance based on several parameters.

How Are Paint Pigments Made?

Paint pigments are usually solid colored powders that are usually insoluble. All paints are made from ingredients called pigments. Pigments do not dissolve and cannot be used in solution form, but in the form of solid particles that are mixed with liquids. Generally, the same pigments are used in both water-based and oil-based paints, printing inks, and plastics. They are first extracted from clay or earth. Although most pigment manufacturers use the age-old process of preparing pigments and then converting them into clay, modern pigments are synthesized in laboratories.

Cosmetic pigments are classified into inorganic and organic pigments. Most inorganic pigments are longer lasting and brighter than organic pigments. Organic pigments have been used for hundreds of years for various purposes. However, most of the pigments used today are either synthetic organic or inorganic pigments. Synthetic organic pigments are made from coal tar and other petrochemicals. Inorganic pigments are made with the help of simple chemical reactions such as oxidation. Organic pigments are used when bright shades are required, and they have high color strength. Inorganic pigments are used when dull shades are made. Inorganic pigments have weak color strength.

Pigments are used in cosmetics, among other uses. Both organic and inorganic pigments are used in cosmetic manufacturing. Organic pigment manufacturers produce lakes and inorganic pigment manufacturers produce iron oxides. Cosmetic pigment manufacturers use both organic and inorganic pigments in the manufacture of cosmetics. Both iron oxides and lakes are non-toxic in nature and do not cause any reaction to the skin. Most cosmetic manufacturers use these pigments in cosmetics as they do not trigger skin allergies.

Iron oxides come in a variety of colors like black iron oxide, yellow iron oxide, etc. The hue depends on factors like pH, temperature, concentration, etc. Soluble dyes react with metal salts to form lakes. While organic pigments are certified, iron oxides are not, but are widely used in cosmetics like foundation, lipstick, eye shadow, etc.

Inorganic pigments include white opaque pigments that are used to lighten other colors and provide opacity. The most important member of this class of pigments is titanium dioxide. White filler pigments are added to paints to improve their properties and reduce their cost. This class of pigments includes calcium sulfate, calcium carbonate, china clay, and diatomaceous earth. Black pigments are mainly made of carbon particles. Iron oxide earth pigments produce yellow-brown, brown, and orange-brown colors. Certain chromium compounds produce orange, chrome yellow, and green. Various cadmium compounds produce orange, bright yellow, and red.

Organic pigments are synthesized from aromatic hydrocarbons. Organic pigments include azo pigments. They make up the majority of organic orange, red, and yellow pigments. Copper phthalocyanine provides intense green and blue. Some pigments, such as fluorescent pigments, are dyes that become insoluble through chemical reactions. In terms of use, lakes and oxides are good choices because they do not have any side effects. Both organic and inorganic pigments can be used regardless of age or skin type. For cosmetic coatings, lakes and oxides are better than industrial coatings or inks.

Application of Coating Pigment

Application of paint pigments in architectural coatings
Due to the rich colors of latex paint, which can be selected at will, good decorative effect and long service life, architectural coatings with acrylic emulsion as film-forming materials play an increasingly important role in urban dressing. As an important component material of latex paint, the selection and use of organic materials directly affect the color retention of latex paint. Faced with the understanding of pigment properties and applications, it can guide the production of high-quality latex paint.

Application of paint pigments in automotive coatings
Automotive coatings should meet the weather resistance, heat resistance, acid rain resistance, UV radiation resistance and harm resistance of metal surface coatings. Pigments for automotive coatings are a high-quality colorant. The change of car color is to adjust the paint pigments in the coating. Therefore, the application of paint pigments in automotive coatings must have stability, chemical resistance and impermeability. Thermal stability. For automotive topcoats, such as metallic glitter paints, paint pigments are required to have high transparency and supplement the hiding power of inorganic pigments.

Application of paint pigments in coil coatings
Coil coatings are divided into functional topcoats, primers and primers. The main types of primers are epoxy resins, polyesters and polyurethanes: the topcoat and primer varieties mainly include PVC plastic melts, polyesters, polyurethanes, acrylics, fluorocarbons and silicones. Polyester, etc. Generally, coil coatings require high temperature resistance and weather resistance of pigments.

Material of Coating Pigment

Iron oxide pigments

Iron oxide pigments are inorganic pigments that are mainly used to make paints in colors such as yellow, brown, red and black. For example, the red pigment used in red paint is iron oxide pigment.

Titanium dioxide

Titanium dioxide is an inorganic pigment and the most common white pigment in paint. It can improve the hiding power and gloss of the paint.

Organic pigments

Organic pigments are pigments produced from organic compounds. They have many colors and a wide range of uses. For example, the blue pigments used in blue paint are mostly organic pigments.

How to Maintain Coating Pigment

Choose the right container
Choose an odorless, tasteless, and airtight container. If the workload of paint and pigment is large, it is recommended to use a hard plastic box or glass bottle.

Dry and good environment
Dry and ventilated, avoid direct sunlight. The best storage environment is a cool, ventilated place with a relative humidity of about 50%.

Clean tools and hands
The maintenance of paint and pigment requires the use of various brushes and tools. These tools need to be cleaned before use.

Air-drying maintenance method
Spread the squeezed part of the paint and pigment evenly on porcelain plates, glass plates, etc. to avoid accumulation. Let it air-dry in a ventilated, light-proof, low-temperature, dry environment to prevent deterioration and aging.

Freezing maintenance method
This method is most suitable for paint and pigment or loose powder. Put it in a freezer and freeze it to keep it below -6℃.

Filling method
Put the container half full and the surface is flat. You can cover the top with an airtight plastic film to increase the density and reduce oxygen infiltration. It can be placed in a ventilated and light-proof storage room.

Avoid direct sunlight
Paint pigments tend to age and lose color under direct sunlight and should be placed in a dark place.

Avoid high temperature environment
Do not place in a hot and humid environment, which will cause the paint pigment to be damaged, rot, or even change the texture.

Regular inspection
Regularly check whether the paint pigment in the storage container has color distortion, hardening, etc. If so, summarize or replace it in time.

How to Choose a Coating Pigment

Color stability
Color stability is the ability of a pigment not to be destroyed or discolored under different environmental conditions. When selecting a pigment, it should be evaluated from the perspective of pigment stability to prevent the appearance of the coating from being damaged by changes in color.

Glossiness
Glossiness refers to the ability of a coating to reflect light, and its size is related to the visual effect of the coating. The selection of pigments in paint pigments must meet the gloss requirements to achieve the desired visual effect.

Hiding power
Hiding power refers to the degree to which a coating covers the color or pattern on the surface of the substrate. The hiding power of a pigment determines the hiding power of a coating, so when selecting a pigment, its hiding power should be fully considered.

Lightfastness
Lightfastness refers to the fact that a coating is not prone to yellowing or discoloration under sunlight or ultraviolet rays. High-quality pigments have good lightfastness and are not easy to fade when used outdoors, which is important for maintaining aesthetics.

Durability
Durability refers to the long-term durability of paint pigments in the environment, such as anti-fouling, anti-scratch, and anti-chemical erosion. The durability of pigments is reflected in their stability and weather resistance. For applications that require higher durability of coating pigments, good quality pigments should be selected.

Our Factory

Set in the year of 2003, Henghao Technology Development (Hangzhou) Co., Ltd.'s predecessor is Hangzhou Henghao Pigment Co. The company's headquarters has two divisions: Henghao Pigment & Henghao Powder which has independent R&D lab and production bases. We have been doing lots of researches & developments with major domestic universities together, and keeping the latest technology and market competitiveness advantages.

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FAQ

Q: What is a coating pigment?

A: Pigments are organic or inorganic, colored, white, or black materials. They impart color when added to paints and coatings formulations. They also add bulk or desired physical and chemical properties to the wet or dry film. The smallest units refer to primary particles.

Q: What is a pigment used for?

A: The primary purpose to use pigments is to provide colour to materials, whether they are textiles or paints. Some people often consider pigments and dyes to be the same but they're quite different. The major difference between the both is in terms of their solubility.

Q: What is the difference between paint and coating?

A: Painting is a special case of applying coatings made of polymer based materials. coating application you need to apply temperature and pressure in order to perform a layer while painting is just enough you apply the high temperature to cure it. Definately different process and application.

Q: What is the difference between pigment and paint?

A: Pigment is the actual coloring substance of paint. Unlike purely visual color, pigment has physical substance, often referred to as "body." Pigments usually have a mineral or organic origin, although some, like the crucial lead white, are artificially produced.

Q: What are the three types of coating?

A: Coatings protect and beautify the surfaces to which they are applied, enhance the value of everything — from homes and manufactured products, to bridges and other structures. Coatings are varied, but primarily fall into three categories: Architectural, Industrial, and Special Purpose.

Q: Is pigment better than dye?

A: Es-pecially when the label is exposed to UV light for many months, the pigment ink holds its colour, quality and vibrancy better than dye. Speaking of water resistance and long life durability plus colour consistency the winner is pigment ink.

Q: What is an example of a pigment?

A: A pigment is a natural colouring matter found in plant or animal cells or tissues. It is capable of changing the colour of reflected or transmitted light and it does so via wavelength-selective absorption. For example, the presence of a pigment chlorophyll imparts a green colour to the leaves of plants.

Q: Why do we need pigments?

A: Pigments are the chemical substances, which exhibit wavelengths of the visible light, making them appear colourful. Plants, flowers, algae, certain photosynthetic bacteria and even the skin of animals have a particular type of pigments, which provide colours and also have an ability to absorb some wavelengths.

Q: What do you mean by pigment?

A: A substance that gives color to other materials. especially : a powder mixed with a liquid to give color. A natural coloring matter in animals and plants.

Q: What is the purpose of a coating?

A: A coating is a covering that is applied to the surface of an object, or substrate. The purpose of applying the coating may be decorative, functional, or both. Coatings may be applied as liquids, gases or solids e.g. powder coatings.

Q: Which type of coating is best?

A: Ceramic coating offers better protection against scratches and UV rays, while Teflon coating is better at protecting the car's paint from stains and contaminants.

Q: What is the advantage of coating?

A: Coatings help protect against the damage caused by wear-prone applications. They have been designed to be wear resistant, reduce friction, protect against caustic/acidic materials and cleaning agents, and increase line efficiencies. Coatings come in two categories – organic and inorganic.

Q: What is pigment coating?

A: Pigments are insoluble particulate materials that provide colour, opacity, gloss control, rheological control, and certain functions such as corrosion inhibition or magnetic moment. They also reduce the cost of coatings by acting as a volume filler.

Q: Can I mix pigment with paint?

A: Working with pigments is just as easy as working with tinting pastes. Pigments simply need to be mixed with water to make a paste before adding to paints or plasters. We recommend to use soft water like purified water. This step-by-step guide will help you get started with tinting pigments.

Q: What is the purpose of adding pigment to the paint?

A: Pigment: It is an essential constituent of paint. It provides color and opacity, in addition to that imparting strength and aesthetic appeal to the paint.

Q: How many types of paint coating are there?

A: Here, we'll describe the benefits and tradeoffs of four of the most common generic coating types: Epoxies, polyurethanes, polysiloxanes and zinc-rich primers, providing examples of how each might be used in a total coating system.

Q: Which method is used for coating?

A: CVD, PVD, Duplex, PACVD, and TRD are the most conventional techniques in the coating. Generally, the combination of these techniques with other surface engineering methods shows a high-efficiency performance.

Q: What is the basic coating process?

A: The coating process consists of applying a coating material to a moving web of flexible substrate. The carrier substrate may be paper, film, or aluminum foil and the resulting material's additional properties will vary depending on the required application and on the material's end-use.

Q: Does pigment fade?

A: When are paintings are more than meets the eye? With the passage of time much may change – colors may fade or even disappear as the pigments that comprise paints degrade due to reactions with UV light and moisture.

Q: Are pigment inks waterproof?

A: One of the significant benefits of pigment-based ink is that it is waterproof. This means that you can use it to print on fabrics for outdoor clothing, use it for watercoloring cards, stamping on shrink plastic, and more. Another benefit to using pigment inks is that they are more water-resistant than dye inks.

We're professional coating pigment manufacturers and suppliers in China, specialized in providing high quality products with low price. We warmly welcome you to buy bulk customized coating pigment made in China here from our factory. For pricelist and free sample, contact us now.

Pigment Red 2 for paints, Pigment Red 57 1 for powder coating, Pigment Violet 27 for Textile Printing Ink