About us

About us

Vision and values

Our vision is to offer an interesting assortment of kaolin products and products made from other silicate materials. We would like to follow in the tradition of our ancestors while, at the same time, taking advantage of the latest technologies and introducing new ideas that will satisfy our customers yet be environmentally friendly. Our values rest on the application of the simple principles on which we have built our stability and prosperity.

Our history

"Quality for centuries"

18th Century

The first attempts to produce porcelain from local raw materials in the Karlovy Vary region and the beginning of kaolin mining.

19th Century

Porcelain production in the Karlovy Vary region expands. Small companies extract kaolin and are involved in its simple processing – competition grows. Kaolin is mostly mined by larger companies.



Successful kaolin mining in the Karlovy Vary region and a flourishing porcelain industry initiate the foundation of Zettlitzer Kaolinwerke AG.


Dynamic growth

The ever-growing company acquires more and more plants, particularly in Saxony. In 1938, it already owns nine deposits, ten washing plants, two brickyards, a coal quarry and a porcelain factory (Merklín).


International standard set

Zettlitz Kaolin is declared a kaolin standard at the IUPAC Congress in Copenhagen. The trademark has survived all subsequent organizational and ownership changes.


Aquiring the competition

The company grows by acquiring small kaolin producers – Zebisch & Pfeiffer, Lorenz and Mottl.



After the demise of the company as a consequence of the war, all kaolin mining and processing in the Karlovy Vary region is nationalized. Activity is recommenced by the national enterprise called Sedlecko–Vildštejnské Kaolinové a Hlinné Závody.


Back above the ground

Some of the mining takes place in underground mines. The company reorganization results in its division into seven production locations – the Sadov, Božičany, Hlubany, Skalná, Provodín, Střeleč and Sedlec mines. The company changes its name to Keramické a Sklářské Suroviny, Sedlec u Karlových Varů.



Kaolin production is modernized, and new products introduced to the market – plasters and paints.


New plants

Sedlecký Kaolin, a.s. acquires Prototypa, a.s., a company from Brno, which develops weapons and sells Sedlecký Kaolin products. It starts to manage the Únavov plant, PKZ – Užitková Keramika a.s., Poštorná, which specializes in the production of construction, chemical, garden and sewerage system ceramics, and the Třemošná plant.


Tradition restored

The company is transformed into a joint-stock company and, as the direct successor of the original company, returns to its historical name of Sedlecký Kaolin, a. s. High-intensity, supra-conductive magnetic separation is newly added to the kaolin production process.



Due to the political changes in Czechoslovakia, the company is divided into separate, independent (subsidiary) companies. In 1993, the company is privatized and renamed to Keramické Suroviny, Božičany, s.r.o.


New products

The production of calcined kaolin is introduced in the Sadov plant. The new facility in Božičany introduces cat litter to the market, and the Poštorná plant begins producing sanitary ceramics.


More new plants

Sedlecký Kaolin purchases the Loket plant and acquires a new zeolite deposit.



Introduction of a modern, ultra-fine grinding technology at Sedlecký Kaolin.


Cooperation with THUN

Since 2016, we cooperate on Porcelánová zastávka THUN exposition. More information about the project in following video.


Entrepreneur Project of the Year Winner

In 2014, Sedlecký Kaolin, a.s. won an “Entrepreneur Project of the Year” award in Eco-Energy/Energy Savings category for building congeneratig unit for kaolin drying. More information about the project in following video.



Sedlecký Kaolin, a.s. innovates the calcinated products and additives and introduces a new method of kaolin fluid drying. Moreover, it innovates porcelain production products and functional fillers for the automotive industry. It also introduces a magnetic separator.


Sadov plant modernized

Complete modernization of production line for cat litter in Sadov plant.

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