Kaadener Grün ist die Bezeichnung für eine grüne Erde, die als Pigment Verwendung fand. Sie stellt die eigentliche "Böhmische Grüne Erde" dar. Die grüne Erde wurde im 19. und 20. Jahrhundert nahe der Stadt Kada? (Kaaden) in Westböhmen abgebaut. Die Arbeit gibt eine Übersicht über die Maltechnik grüner Erden und geht anschließend auf die verschiedenen Grünerdelagerstätten in Europa ein. Im speziellen Teil über die Lagerstätte von Kada? wird die Mineralogie und Geologie des Duppauer Gebirges und der Lagerstätte am Burberg bei Kada? erläutert. Der Hauptteil beschäftigt sich mit Recherchen zur Montan- und Wirtschaftsgeschichte sowie der phasenanalytischen und mikroskopischen Charakterisierung des Kaadener Grüns. Eine umfangreiche Literaturrecherche und Archivrecherchen im Státní okresní Archiv Kada? (Staatliches Kreisarchiv Kadan) gaben Aufschluss über die Gewinnung, die Verarbeitung und den Handel der Grünerde. Eigene Geländearbeit hat wesentlich zum Verständnis der Akten beigetragen. Die mineralogische Charakterisierung der Grünerde ergab Seladonit als farbgebendes Mineral. Vergleichsuntersuchungen umfassten die seladonithaltige Grünerde vom Monte Baldo (Italien) und glaukonithaltige Grünerde aus Benediktbeuern.     «

Kaadener Grün ist die Bezeichnung für eine grüne Erde, die als Pigment Verwendung fand. Sie stellt die eigentliche "Böhmische Grüne Erde" dar. Die grüne Erde wurde im 19. und 20. Jahrhundert nahe der Stadt Kada? (Kaaden) in Westböhmen abgebaut. Die Arbeit gibt eine Übersicht über die Maltechnik grüner Erden und geht anschließend auf die verschiedenen Grünerdelagerstätten in Europa ein. Im speziellen Teil über die Lagerstätte von Kada? wird die Mineralogie und Geologie des Duppauer Gebirges und...     »

Research in existing literature gave information about the terms “Kadaň Green” and “Bohemian Green”: The Kadaň Green earth was mined and distributed in great quantities during the 19th and 20th century. As there are no other comparable deposits of green earth in Bohemia, “Kadaň Green” apparently is identical to “Bohemian Green”. That is to say, the original meaning of “Bohemian Green” is the green earth from Kadaň. The usage of this term implied both its olive green and warm colour. Today the term “Bohemian Green” is only related to its colouring; the actual Bohemian deposit has been forgotten. Research in Czech archives produced several documents from the Státní okresní archive in Kadaň; these documents had not been inspected and analysed before. Boxes number 756 and 766 contain files about the “Atschauer Grünerdefarbgesellschaft” and the mine. These documents have been sifted and partly transliterated. A copy has been deposited at the Lehrstuhl für Restaurierung, Technische Universität München. Details about the formation of the company in 1838/39 have been documented by archive material. All founder members and all properties which became part of the company are listed (see appendix/Transkription). Also from the Kadaň archive, an information brochure (LAUBE/BECKER/PALM 1903) edited by the owners of the mine, contains substantial information about mining, processing and trade with green earth. During own field research, remaining traces of the mining activities in the former military area could be located. The green earth was used as a pigment during the 19th and 20th century, mostly as a paint, which is why it was sold to neighbouring countries. In the middle of the 20th century, the Kadaň green earth was an ingredient of the “Frontón 14” paint by the Prague company “Pragolack”. This paint has been used by the military, probably as a camouflage colour. Each year up to the 1950s, 200 tons of green earth have been bought by Pragolack. One chapter of this thesis discusses the mineralogy and geology of the mine: it is located to the south-west of Kadaň, close to the Doupouv and the Erz Mountains. To understand the geological situation of the mine in this context, a geological overview on western Bohemia and the Doupouv Mountains is given. The volcanic Doupouv Mountains, which redominantly evolved during Miocene, mostly consist of basalts and tuffs. The green earth layer goes down to a depth of 70m at the foot of the Úhošt, located at the north-eastern border of the mountains. The deposit at this location is linked to the existence of fresh-water lime. The mineralogical characterisation of green earth has resulted from various analytical methods: microsections, thin-ground sections and powder compounds analysed with a polarisation microscope gave information about the microstructure of green earth. The usage of a scanning electron microscope yielded surface images. Comparative analyses of Kadaň and other green earths were performed using an x-ray diffractometer and an infrared spectroscope. This revealed a structural similarity of the celadonite-containing earths (green from Kadaň and Monte Baldo, Italy) and the glauconitic earths (green from Benediktbeuern, Germany), although macroscopical differences could be identified. Glauconite is a mineral formed sedimentarily whereas Celadonite does evolve from the decomposition of igneous rocks. This difference is the basis for the mineralogical classification of both minerals.     «

Research in existing literature gave information about the terms “Kadaň Green” and “Bohemian Green”: The Kadaň Green earth was mined and distributed in great quantities during the 19th and 20th century. As there are no other comparable deposits of green earth in Bohemia, “Kadaň Green” apparently is identical to “Bohemian Green”. That is to say, the original meaning of “Bohemian Green” is the green earth from Kadaň. The usage of this term implied both its olive green and warm colour. Today the te...     »