Difference between revisions of "Category:Gamboge: Ukiyo-e colorant"

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File:15_Powd_gamboge_200X.jpg|Gamboge, transmitted light
 
File:15_Powd_gamboge_200X.jpg|Gamboge, transmitted light
 
File:gamboge_dyed paper.jpg|Gamboge dyed paper
 
File:gamboge_dyed paper.jpg|Gamboge dyed paper
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Gamboge color.PNG|EEM Color
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Gamboge color.PNG|3D EEM plot of turmeric
 
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Revision as of 12:30, 29 April 2020

Description

Gamboge (shio): A yellow-orange gum-resin produced by several species of Garcinia tree found in India, Thailand, Cambodia, Vietnam, and Ceylon. Gamboge was used as a yellow pigment as early as the 8th century in Asia and Japan. It was regularly imported to Europe in the 17th century but a few earlier deliveries may have occurred. Gamboge is composed of a yellow resinous component (70-80%; morelloflavone) and a clear water-soluble Gum (20%). Gamboge is marketed in the form of dull, brownish-yellow cakes or lumps. When powdered, it has a rich golden color. Gamboge is used as a transparent colorant in glazes, varnishes, and watercolors. The carbohydrate gum acts as a natural binder. The yellow color fades when exposed to light or Ozone. In some cases it has recovered its color when placed in the dark.

  • Gamboge pieces

  • Gamboge, powdered

  • Gamboge: Vis (left) UV (right)

  • Gamboge, transmitted light

  • Gamboge dyed paper

  • 3D EEM plot of turmeric

Examples

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