Pigment for Paper Ink - Use of Pigment for Paint in Paper Solutions

17 Years of Experience in Pigment for Paper Inks Solutions - Original Paper Pigment Manufacturer - KingChroma

What are pigments for paper paint and paper inks?

Paper inks are essential for printing of patterns or texts on paper. They are made by evenly mixing main components and auxiliary components and rolling repeatedly into viscous and gelatinous solution. Main components include pigments, binders, additives and solvents. Paper inks are suitable for books, packages, architectural decoration, etc. The ink varieties and output are expanded in response to increasing needs. Major paper inks include solvent-based inks, water-based inks, UV inks, screen printing inks, offset printing inks, thermally variable inks, optically variable inks, pearlescent printing inks, etc.

Paper Ink Pigment Powders

Mica Powders for Paper Inks

Pigment for Thermochromic Inks

Photochromic Pigments for Paper Inks

Pearl Powder for Paper Inks

Glow in the dark powder for Paper Inks

Chameleon Powder for Paper Inks

UV Powder

Reflective Pigment

Iron oxide powder

Titanium dioxide Pigment

Paper Pigment Examples

Colored Paper

Thermochromic label paper

Anti-counterfeiting label paper

Photochromic label paper

Paper Ink Pigment FAQs

Paper inks are mainly affected by pigment properties, such as the color, coloring power, density, fineness, activity, solubility, oil absorption, covering power, dispersion, apparent specific volume, surface properties, adhesion, etc.

Main components:


Colorants include pigments (organic and inorganic) and dyes. Among them, organic pigments featuring bright color, high coloring powder and fast drying are widely applied in inks, such as azo and phthalocyanine pigments. Inorganic pigments have high light fastness, heat fastness, solvent fastness and covering powder, such as titanium white, cadmium red, chromium green and ultramarine. Pigments are in the particle form instead of dissolution, as the most common colorants for inks. Dyes are in the solution form for coloring at the molecular level, so their effects are inferior to those of pigments. Colorants can change the ink color, concentration, consistency and dryness.


As a major component of inks, binders are able to disperse colorants and auxiliary materials. They are prepared by dissolving a small amount of natural resin, synthetic resin, cellulose and rubber derivatives in drying oil or solvent. Inks containing binders are in the fluid form, which can be applied into an even and thin layer and change to a dry film of certain strength to protect pigments from peeling.

Binders have significant impact on the printability (e.g. transfer, brightness and adhesion rate) and effectiveness of inks. It is critical to use appropriate binders in printing. Adjust the composition and mix ratio of binder from time to time based on packaging materials, printing requirements, etc.

Paper pigments are mostly inorganic, such as iron oxide and carbon black. But organic dyes are widely applied for more colors.

By colors, major paper pigments include the following.

Color-changing pigments

They mainly consist of pearlescent pigments, thermochromic pigments and photochromic pigments. They are applied in various fields due to color changes on paper under different conditions.

Black pigments

Black pigments rank only second to white pigments. An important black pigment is carbon black, with the blackness and hue as its main quality indicators.

Red pigments

Among inorganic pigments, iron oxide red is a major red pigment, varying from yellow to red/brown and then black. As the most common type, it has high covering power, coloring power, chemical resistance, color retention, dispersion, and low price.

Yellow pigments

Mainly include iron oxide yellow (hydrated iron oxide), etc. Despite dark color, iron oxide yellow has high durability, dispersibility, covering power, heat fastness, chemical resistance, alkali resistance and low price. They are widely applied in building materials.

Green pigments

Major green pigments include chromium oxide green and lead chromium green. The former has high light fastness, heat fastness and chemical resistance, but dark color and low coloring and covering power. The latter has lower durability and heat fastness than chromium oxide green, but brighter color and higher dispersibility. They can be easily processed. Due to toxic heavy metals, organic pigments such as phthalocyanine green have been used less than before.

Blue pigments

Major blue pigments include iron blue, cobalt blue, ultramarine, etc. Among them, ultramarine with large output has alkali resistance, bright color and heat fastness, but no acid resistance. Iron blue has higher acid resistance, covering power and coloring power than ultramarine, but lower alkali resistance and durability. As phthalocyanine blue has better properties, with the coloring power twice higher than that of iron blue, iron blue is used less year by year. Cobalt blue has high heat fastness and light fastness, but low coloring and covering power and high price leading to restrictions in applications.

There are a variety of paper inks, which are classified as follows by printing methods, printing stocks, drying methods, ink characteristics, ink composition, etc.

By printing methods, paper inks are classified into relief printing inks, planographic printing inks, intaglio printing inks, gravure printing inks, screen printing inks, etc. For instance, relief printing inks are mainly for journals, magazines and newspapers, while gravure printing inks for high-quality albums and bills.

By printing stocks, paper inks are divided into paper, metal, plastic and fabric inks.

By drying methods, paper inks are divided into penetration drying inks, oxidative polymerization inks, volatile drying inks, photo-hardening inks, thermosetting inks, cold setting inks, etc. They can be dried by means of natural drying, hot air drying, infrared drying, ultraviolet drying, drying by cooling, etc.

By ink characteristics, paper inks are divided into color inks (e.g. yellow, red, blue, white, black, gold and silver), functional inks (e.g. magnetic inks, anti-counterfeiting inks, food-grade inks, foaming inks, aromatic inks and recording ink) and resistant inks (e.g. light resistance, heat resistance, solvent resistance, abrasion resistance, alcohol resistance and drug resistance).

By ink ingredients, paper inks are divided into dry oil-based inks, resin oil-based inks, organic solvent-based inks, water-based inks, paraffin-based inks, glycol-based inks, etc. They can also be classified into gel, liquid and powder categories.

In short, inks are used according to specific printing needs and conditions, such as printing methods, printing stocks, drying methods and ink characteristics.

Pigments are dispersed in paper inks as follows during production:

  1. Fully mix the pigment powder, resin and other substances.
  2. Add an appropriate amount of dispersantand stir the mixture.
  3. Add the solvent, and stir the mixture into paste.
  4. Adjust thecolor and viscosity to ideal inks.

Note: Adjust the amount of dispersant according to the properties of pigments and substrates. Too little or much dispersant will affect the ink quality and stability of ink. Additionally, it is necessary to follow safe operation procedures to avoid health hazards.

The dispersant is very important for the ink quality and stability during production, so that inks are more suitable for different printing materials and applications. Deep understandings and mature skills regarding dispersants are required to produce high-grade inks.

Color is an important appearance indicator of paper. Dyeing is to make paper meet customer needs for colors. It is generally divided into pulp dyeing and surface dyeing. In conjunction with production experience, pulp dyeing and its control are introduced briefly here.

For pulp dyeing, common dyes include direct dyes, basic dyes and acidic dyes. Please choose dyes based on paper applications, fully considering the following factors.

  1. Affinityto fibers.

Packaging paper of high-grade products are not allowed to fade in water. Please use direct dyes with high affinity to fibers. Basic and acidic dyes are prohibited in order to avoid discoloration and contamination.

  1. Paper colors.

Use basic dyes or direct dyes with bright colors for paper with special color requirements. If necessary, use some whitening agents to make paper brighter.

  1. Use light-fast dyes or direct dyesas needed for paper.

Do not use basic dyes; otherwise, paper may fade fast in the presence of light.

  1.  Dye characteristics.

One dye may have different dyeing characteristics for various types of pulp. Comparatively, direct dyes are stable while basic dyes differ greatly. For instance, mordants are usually used when bleaching pulp is dyed with basic dyes.

  1.  High-grade paper is often dyed with high-adhesion dyes.

A small amount of high-adhesion dye can lead to better dyeing effects. However, low-adhesion dyes do not have ideal dyeing effects if they are used much.

  1. Dyeing costs.
  • Factors affecting the particle size of printing paper ink

The particle sizes of inks affect the printing quality, sprayed blisters and nozzle wear, etc. It is mainly affected by the ink composition, particle type, production technology, etc. Different inks have different particle sizes. For instance, the particle sizes of organic solvent-based inks are usually small while those of water-based inks are large. The particle sizes of inks are also affected by the ink color and concentration.

  • Application of particle size of printing paper ink

Inks of different particle sizes are widely applied in printers, inkjets and other printing equipment. Different inks have different particle sizes. For example, ultra-fine inks are suitable for high-definition printing, while ordinary inks for general printing. The particle sizes of inks can be controlled to avoid nozzle blockage and ink waste, thereby improving the printing efficiency and yield.

  • Conclusions

The particle sizes of printing paper inks have important impact on the printing quality, spray blisters, nozzle wear, etc. They are affected by the ink composition, particle type, production technology, etc. Fine control of the particle sizes will help to improve the printing quality and production efficiency. This is also one important focus in industrial production and academic research.

How to use pearl powder for car paint?

Can you add pearl powder for car paint? Pearlescent powder is suitable for car paint. Pearlescent car paint is a special car paint containing pearlescent particles.

How to use titanium dioxide for paint?

What does titanium dioxide do in paint? 1. Improve the covering power of paint An appropriate amount of titanium dioxide can improve the covering power

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