top of page


If you have any questions or need an individual polishing agent: please contact us!


Polishing agents

Aluminium oxides – Aluminas


Industrially produced aluminium oxides are called aluminas. They have been used successfully in polishing for decades, as the hardness and grain structure can be controlled by calcination and pre-treatment. One therefore speaks of

This distinction helps you, as the developer of the polishes, to make an initial preselection for the surface to be treated.


As the degree of calcination increases, so does the hardness of the grain.


For comparison with other materials, the Mohs hardness:


Since the surfaces treated during polishing change from year to year for a variety of reasons, developers are always faced with new challenges. Sometimes a metal alloy changes because it becomes better or more cost-effective. Sometimes a lacquer changes because the new formulation is more valuable from an environmental point of view. With these changes, in most cases the surface also undergoes a change.

Therefore, it is always relevant to know one's surfaces in detail.


We have a wide knowledge of different surfaces and especially of the grain composition of our aluminas. We help you to find the right alumina for your application.

Let's look at the example - polishing car paintwork. The car paint undergoes its first polishing process in its lifetime, possibly already after the paint has been applied. Small irregularities or dust inclusions are repaired by professionals with polishing machines and polishing agents. The conditions here are fundamentally different from when the end user polishes his car. The equipment and also the aluminium oxide contained in the polishes are much more abrasive. In the case of the end user, the top, slightly weathered layer of paint is usually gently removed, exposing the layer underneath. Fine scratches can also be removed with the polish, depending on its composition. A distinction is made between paint cleaners and polishes. Paint cleaners do not generally preserve the paintwork, are more abrasive and must then be protected again with a sealant. A freshly polished car becomes more beautiful again with the overall treatment and is more hard-wearing in the face of weather-related and environmental influences. In any case, the right technique and execution are important. Car care product manufacturers provide valuable advice on this.


Layered silicates –Kaolinite

The mineral kaolinite is a phyllosilicate that occurs naturally. The name kaolinite is derived from the rock kaolin, of which it is the main component. Kaolin in turn is derived from the first place of discovery, the Chinese village 高嶺 Gaoling (from Chinese: gāo lĭng = high hill).


Kaolinite has a Mohs' hardness of 2 to 2.5, a density of 2.61 to 2.68 g/cm. The mineral is a ubiquitous aluminium silicate in the soils of warm, humid regions. It is purified and calcined before being used in industry. In the polishing field, it is very successful when used in gentle polishes, resulting in a beautiful finish.

Tungsten carbide

The abrasive in the professional sector. It can be provided in the desired quality on request.


Zirconium silicate

Available on request.

It can be provided in the desired quality on request.






Mixed oxides

We can also produce mixed oxides for you on request.

It can be provided in the desired quality on request.

Polishing agents in the nano range

Nanoscale aluminium oxide powders are often used in high-gloss polishing of stainless steel, aluminium, stone and metallographic polishing. Speed and good gloss play a major role here.

Read our advice on working safely with nanoscale products here.

bottom of page