Cologne bridge green

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Detail of the pillars on the Mülheim Bridge in chrome oxide green
Cup with paint
Chromium oxide green pigment

Cologne Bridge Green , also Cologne Green, describes the color chromium oxide green , whose inorganic pigments (amorphous chromium (III) oxide Cr 2 O 3 ) are particularly light-resistant and weatherproof. The name Kölner Brückengrün indicates that the color is used as a coating on four of the eight Cologne Rhine bridges in particular .

history

The paint produced by Bayer AG was first used for the new Mülheim bridge in 1929 at the instigation of the mayor of Cologne , Konrad Adenauer , who wanted a patina green color . Of the eight Cologne Rhine bridges , five were later painted in this color, which is why Bayer advertised and made it known under the name Kölner Grün . Architects who wanted more striking colors for their buildings could not prevail (for example red for the new zoo bridge ).

In the original "Adenauer-Grün" only the bridges that are maintained by the city of Cologne are coated ( Mülheimer and Deutzer Brücke, Severins- and Zoobrücke ). The Rodenkirchener Rheinbrücke as well as the Rheinbrücke Leverkusen belong to the maintenance burden of the state company road construction NRW , the two railway bridges ( Hohenzollern and Südbrücke ) belong to the Deutsche Bahn and have their own color scheme.

Sample plates with color samples are stored in the dark by the Cologne Office for Bridges and Light Rail Construction and the color is remixed if necessary, but the exact recipe is now known.

The Cologne bridge green is produced by the Inorganic Pigments business unit of the Cologne company Lanxess in Krefeld .

See also

literature

  • Jörg Pfennig: Over bridges, Cologne and the Rhine . conMedia Verlag, Cologne 1994, ISBN 3-929972-06-9 .
  • Horst Schubert: Living Cologne. How the bridges stretched from Cologne to Cologne again . Observations, documents and voices from contemporary witnesses on Cologne's menopause since 1945. Ed .: City of Cologne. 1997.

Individual evidence

  1. ↑ Gerhardt Benzing et al .: Pigments and dyes in the paint industry , 2nd edition, expert verlag Ehningen, 1992.
  2. ↑ Horst Schubert, Gelebtes Köln, p. 42.
  3. ^ Jörg Pfennig: Over bridges, Cologne and the Rhine. P. 17.
  4. ^ A b Maik Zimmermann, employee at the Cologne Office for Bridge and Light Rail Construction.
  5. ↑ Information about Cologne projects on a Lanxess website ( Memento from May 18, 2012 in the Internet Archive ).