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Chapter 3 Anthropogenic pigments

Elsevier Science & Technology
DOI: 10.1016/s0928-2025(98)80004-7
  • Design
  • Philosophy


Publisher Summary This chapter discusses the anthropogenic pigments and focuses on coatings that are applied to rock surfaces by humans. The conservation of rock surfaces involves the application of coatings. Human destruction of natural stone surfaces removes the pre-existing rock coating. This leaves an aesthetic scar on the landscape. Artificial varnish was suggested and tested as a means to reconstructing the natural appearance of surfaces in arid and semi-arid areas. The coloring agents of iron and manganese are added together in the mobile divalent state. When the artificial varnish was placed in the field, there was a rapid reduction in manganese. Then, concentrations settled down. The quick loss of the manganese was from leaching of unadsorbed manganese. Concentrations stabilized after years. Sodium and magnesium appear to be slowly leached, while potassium and calcium slowly builds in concentration. Iron, aluminum, silica, and sulfur remain stable in their abundance.

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