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Pigments are colorants that are not soluble in the host material and scatter light and are therefore opaque. Pigments can be organic or man-made and derive from animals, plants, rocks or minerals and metal oxides, like for example titanium oxide.

What pigments equipment do you need?

Classifier mill for recovered carbon black

Recovered Carbon Black (rCB) can be recycled back to the tire production chain ...

Milling and drying machine for fine powders

When you need to produce ultra-fine powders, the milling and drying process em...

Industrial liquid filtration system

Systems for the filtration of liquids with suspended solid contents can be challenging ...

Laboratory scale active freeze dryer

The laboratory-scale active freeze-drying is used for dehydrating high-value products ...

Active freeze dryer

Freeze-drying is used for dehydrating high-value products that are too sensitive for conventional drying ...

Flash drying system

Flash drying refers to the removal of moisture by a stream of hot gas that goes through a stream of small...

Conical screw mixer

When you want to mix segregative, free-flowing powders and pastes that require perfect mixing quality and...

Laboratory conical screw mixer

A laboratory conical screw mixer is often used in the pharmaceuticals and fine chemicals sect...

Continuous paddle dryer

Purposely focused on the indirect heating and drying of slurry, filter cakes, powders, pastes and gra...

Automatic paint can sealer

If you need to cap paint, glues, and solvents containers and are currently manually placing the l...

Hammer mill

A hammer mill crushes aggregate material into smaller pieces; the most common applications can be found in food, c...

Feeder with flexible wall hopper

The varying properties of dry powder products mean that specialized feeders are required fo...

Side bar filter press

Production of dry cakes is required in a variety of industries and robust, low-cost side bar filtration...

2-way diverter valves for pneumatic conveying

Products conveyed through pneumatic conveyor lines often need to be diverted...

Multi-way diverter valve for pneumatic conveying

Products conveyed through pneumatic conveyor lines often need to be diver...

Dense phase conveyor for normal wearing materials

Dense phase pneumatic conveying is used for powders, granules, and grai...

Dense phase conveyor for powders and granules

Some manufacturing and filling operations require a smaller pneumatic transp...

Wear resistant bends for pneumatic conveying

Bends in pneumatic conveyor lines cause load loss leading to lower flow rates...

Thin film dryers

Dry dissolved or slurried crystallizing or amorphous products to a pourable powder.

Laboratory horizontal agitated ball mill

Tabletop model for the wet grinding of small to ultra-small product batches down t...

Spiral jet mill

Jet mills are frequently used in the pharmaceutical industry and also for the production of fine-grade chemica...

Long gap mill

Ideal for a combined process operation where several process steps are executed simultaneously in one single uni...

Toner classifiers

Especially designed for classifying toner and pigments.

Air flow classifier

Air-flow classifier (pneumatic product feed) for the fine classification of talc, calcium carbonate, bent...

Horizontal Agitated Media Mill

If you are looking for high end-product fineness for suspensions with good flow properties wi...

Horizontal chemical scraper centrifuge

For slurries difficult to discharge, a scraper can improve process reliability, effi...

Horizontal pharmaceutical scraper centrifuge

For slurries difficult to discharge, a scraper can improve process reliabilit...

Isolator centrifuge

For transfering highly active pharmaceutical ingredients (HAPI) without contamination from the isolator c...

Mobile pilot plant centrifuge

The system is perfectly suited for pilot plants as well as small-quantity productions in the f...

Vertical top discharge centrifuge

Discharge solids vertically upward through manual action, optionally using a filter bag o...

Vertical peeler centrifuge

A vertical peeler centrifuge is used to separate solids, usually to separate fine particles from ...

Vertical scraper centrifuges

Vertical Bottom discharge Centrifuges work discontinuously, discharging the solids to the botto...

Pusher centrifuge

Pusher centrifuges are continuously operating filter centrifuges and can have several basket stages dependi...

Pelleting press with overhead drive

Production of certain pelletized products requires working with output products of a pa...

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Tell us about your production challenge

When selecting production equipment for a production plant, it is important to talk to someone with experience in your field. Our industry experts have experience with various industrial applications. We’d love to help you!
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Generally, pigments and paints are not bound chemically to the covered surface, water-soluble dies react with fibers in a mordant bath. Apart from colored, decorative paints, white and black pigments have high importance. White titanium dioxide plays an important role in the painting industry, due to its stability, high covering effect, and UV-light absorbing property. Approximately 4.6 million tons of TiO2 pigment are produced annually worldwide, and its use continues to rise. On the other end of paints, carbon black is essential as a toner of the laser printer and filler in tires and other plastics, also due to its stability and UV-light absorbing capability.

Pigment manufacturing process

Natural sources of paint lost their importance. Lead oxide pigment dispersed in oil was widely used as primer paint, due to its excellent anticorrosive feature. Since heavy metal lead is poisonous, this red paint is nowadays forbidden. Indigo was extracted from plants cultivated in Asia, nowadays the blue die for denim cloth coloration is synthesized almost exclusively by the chemical industry. The coloring materials were solved in organic solvents, benzene, toluene, xilols, turpentine, nitro thinner. All these solvents pollute the environment, some of them are carcinogens. Nowadays water-based products are common, however most part of the paints are not water-soluble. In order to avoid segregation, stable dispersion should be formed where the pigments do not sediment.

In order to eliminate solvents, powder coating is used for painting and decorating vehicle carrosserie and other metal surfaces. Pigments are mixed with polymers, then extruded and milled. Classifier mills are preferable for a narrow particle size distribution

High sheer mixing for powder paints

Powder coatings are a solvent-free painting form where pigment is mixed with a polymer, a carrier material that melts in the painting oven so that the pigments adhere to metal objects. Pigments are micronized to have a smooth surface and become miscible with polymer beads. High shear mixing is necessary to break the force of cohesive powders and form polymer-pigment particles avoiding sedimentation in further processing. The video below shows a high-shear mixer for this purpose with a conical shape that provides a vertical upward movement along the wall.

How dispersion improves paint quality

In emulsion paint, the binding agent is dispersed in water. Dispersion as such an important process that has a big influence on the quality of the final product. Dispersing machines process immiscible materials in a high shear chamber, where sharp edge tools of high-speed rotor reduce the size of the paint particles and disperse them into the oily or water base matrix. A rotor can have paddles as well, to serve as a recirculation pump. The video below shows how at the top of the rotor a vacuum occurs, sucking in the ingredients, liquids, and powders.

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