![The four-metre-long painting "Sonntag der Bergbauern" [Sunday of the Mountain Farmers, 1923-24/26] had to be removed by a crane from the German Chancellery in Berlin for the exhibition in Bern.](https://www.swissinfo.ch/content/wp-content/uploads/sites/13/2025/12/01_Pressebild_KirchnerxKirchner.jpg?crop=1165px,0px,1670px,1670px&w=480&ver=1ea8acae)
Clinker
Cement component
Clinker is a key ingredient for making the most common kind of cement used around the world, Portland cement. Clinker, lumps of limestone and clay, is typically ground with gypsum to become cement. (source: Wikipedia)
In compliance with the JTI standards
More: SWI swissinfo.ch certified by the Journalism Trust Initiative
You can find an overview of ongoing debates with our journalists here . Please join us!
If you want to start a conversation about a topic raised in this article or want to report factual errors, email us at english@swissinfo.ch.