| COLORS: NATURAL DYES AND PIGMENTSKey words: Natural dyes, dye plants, historic dyes and pigments, laking, minerals, crystals, Maya blue, Indigo, traditional knowledge, immaterial cultural heritage, site specific and personal materials, sustainable art materials, uniqueness | 
              
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                | Site specific, unique, and personal | 
              
                |    "Woad Maya blue, Biel/Bienne, June 2012". My first "Maya blue", based on  indigo from woad, grown in my garden in Biel/Bienne, and palygorskite (by Kremer-Pigmente). It seems a bit more grey greenish, than the Maya blue samples commercially available.
 I have to see the color change with different binders and painting technics so.
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                | Lakes | 
              
                |  "purple lake 1"
 Anke Zürn, 
January 2013. Lake pigment based on a natural dye and a clay mineral.
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                | Dye plants and their use - a cultural heritage to keep alive Indigofera specie and woad (Isatis tinctoria). Botanical Garden, Univierity of Zürich.
 Photo: Anke Zürn, 2011
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                | Public presentations / invited talks: | 
              
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                | Invited talk “Indigo“Conference: “Definieren Materialisieren,   Archivieren“, 4-5 October 2012
 Lucerne University of Applied Science and Art, Lucerne,   Switzerland.
  Invited talk: „Farbstoffe“ (dyes)Tag der Chemie, June 2011, University Irchel,   Zurich, in the framework of the International Year of   Chemistry 2011, Zurich, Switzerland.
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