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"How innovative can a company be that was originally founded in 1895? Well - the answer is, actually, highly innovative! This is not least down to the fact that we find ourselves in a globally unique position. We own one of the most significant kaolin and quartz sand deposits in Germany, giving us exclusive access to one of nature's most versatile mineral raw materials. We also know what to do with it, namely produce exceptionally high quality industrial minerals and high-grade REFINERALS® which are a valuable asset in countless applications and create new opportunities in numerous target industries.
We see our role not only as a producer and refiner of raw materials, but even more so as a partner who can add real value for our customers. Covering the full range of innovation, applications engineering and large-scale operational trials, we work in partnership with our customers, providing the support they need to develop lucrative, marketable products. Today, we are proud of our role as the leading solutions provider in Europe’s industrial and highly-refined minerals sector. We are equally proud of our contribution to the prosperity of entire industries as well as to job creation and the ability of countless people to earn a living."

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Gebruder Dorfner Granucol

GRANUCOL® SIG/SIL colored quartz sands are suitable for high-strength worktops and kitchen sinks. The superior mechanical stability ensures an attractive appearance, even after years. Using chemically extremely stable inorganic pigments GRANUCOL® SIG / SIL is characterized by a high color fastness and UV-stability.

Granucol® SIG/SIL

GRANUCOL® HGHW fillers have a high color diversity as well as an attractive and a lively structure Unlimited design options for shower trays, countertops and wall panels. The extremely high scratch resistance ensures stable surfaces for years.

Granucol® HGHW

GRANUCOL® HSAP is the all-rounder within the GRANUCOL® H series and a good alternative to Solid Surface (ATH). Its benefits really come to the fore in sanitaryware: the ultra-fine mineral fillers are workable post-production and can be polished as desired, achieving finishes ranging from matte to high-gloss. And besides excellent formability, Granucol HSAP also lends every composite extra durability.

Granucol® HSAP

GRANUCOL® HSAS offers exceptional scratch hardness and a high filling degree. The optimum grinding and bonding properties makes it an ideal base for bathtubs, washbasins and countertops.

Granucol® HSAS

GRANUCOL® Effect Mix is a new colored quartz mixture that enables particularly attractive surface designs thanks to its depth effect and color fastness. It is based on the proven GRANUCOL® fillers especiallyfor kitchen sinks and sanitary products. In addition, there is an effect pigment that is firmly integrated into the mixture in an innovative coating process. The result: A surface with metallic shimmering effects with excellent contrast and color brilliance – and high stability at the same time.

Granucol® Effect Mix

The filler GRANUCOL® Black+ convince through the high-quality surface and at the same time extremely hard and thus extremely resistant to all influences of the everyday life. Due to its low shrinkage it facilitates the manufacturing process and thus able to meet all the requirements of designers and manufacturers.

Granucol® Black+

GRANUCOL® DURA/SIL combines the best properties of GRANUCOL® SIG/ SIL and GRANUCOL® FFB/SIL for high-strength worktops and kitchen sinks. The colored quartz sands are available in a wide range of colors and – besides numerous design options – offer a high resistance to mechanical and chemical stress, as well as good anti-shock properties.

Granucol® DURA/SIL

GRANUCOL® FFB/SIL offers a consistently high strength under mechanical and chemical stress. The product is characterized by a high UV-stability and good anti-shock properties. The inorganic binder ensures an optimal connection of the pigments with the quartz. The product offers economical advantages due to reduced binder consumption.

Granucol® FFB/SIL

Granucol® HG is the ideal filler when it matters! Shower trays, washstands and countertops impress with their extremely high scratch resistance and hardness. A high dimensional accuracy of the castings and a high degree of filling offer ideal conditions for economical production processes.

Granucol® HG

Gebruder Dorfner

"How innovative can a company be that was originally founded in 1895? Well - the answer is, actually, highly innovative! This is not least down to the fact that we find ourselves in a globally unique 

Gebruder Dorfner - Innovative - Kaolin - Quartz Sand - Knowde

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GRANUCOL® HSL doesn't take it so heavy, the mineral filler offers the easy alternative - through itslow density, the final product is 30% lighter. A particularly low shrinkage, as well as a very high scratch resistance, makes it an ideal basis for bathtubs, shower trays, washbasins and wall panels.

Granucol® HSL

GRANUCOL® HSL doesn't take it so heavy, the mineral filler offers the easy alternative - through itslow density, the final product is 30% lighter. A particularly low shrinkage, as well as a very high 

Granucol HSL - Gebruder Dorfner - Filler & Extender - Knowde

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