Difference between revisions of "Category:Indigo/Orpiment: Ukiyo-e colorant"

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== Analysis ==
 
== Analysis ==
Fiber optic reflectance spectroscopy (FORS) and X-ray fluorescence analysis (XRF) is used to identify indigo+orpiment.
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Fiber optic reflectance spectroscopy (FORS) is used to identify [[:Category:Indigo: Ukiyo-e colorant|indigo]] and X-ray fluorescence analysis (XRF) is used to detect arsenic, which is an indication for the presence of  [[:Category:Orpiment: Ukiyo-e colorant|orpiment]] (As<sub>2</sub>S<sub>3</sub>).
 
<gallery mode="packed" heights="200px" style="text-align: left">
 
<gallery mode="packed" heights="200px" style="text-align: left">
Turmeric EEM ref.jpg|<center>3D EEM plot for Turmeric</center>
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Indigo FORS.JPG|<center>FORS spectrum of Indigo reference</center>
Yellow EEM plots.jpg|<center>3D EEM plots for Yellow references</center>
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Slide4 FC334.PNG|<center> XRF spectrum of Orpiment</center>
 
</gallery>
 
</gallery>
  
 
==List of Prints ==
 
==List of Prints ==
 
Below is a list of prints where indigo + orpiment was detected.
 
Below is a list of prints where indigo + orpiment was detected.

Latest revision as of 00:35, 27 July 2020

Kamakura Village by Katsushika Hokusai

Indigo + Orpiment: Green is achieved by mixing or overprinting a blue and a yellow colorant. The dominant formulation for green after the introduction of full-color printing after 1765 is a mixture of indigo and orpiment. By altering the proportions of each, a wide variation of greens could be obtained. The preference for this formulation of green might be due to the relative stability of both indigo and orpiment to moisture. However like most of the colorants used for woodblock printing during the Edo period both will fade upon prolonged exposure to light.

For more information see: Indigo, Orpiment

Examples of Indigo+Orpiment in Ukiyo-e Prints

Dyed indigo.jpg

Indigo FORS.JPG
Beauties of the Yoshiwara by Suzuki Harunobu

Dyed indigo.jpg

Indigo FORS.JPG
Beauties of the Yoshiwara by Suzuki Harunobu

Dyed indigo.jpg

Indigo FORS.JPG
Beauties of the Yoshiwara by Suzuki Harunobu

Dyed indigo.jpg

Indigo FORS.JPG
Beauties of the Yoshiwara by Suzuki Harunobu

Dyed indigo.jpg

Indigo FORS.JPG
Beauties of the Yoshiwara by Suzuki Harunobu

Analysis

Fiber optic reflectance spectroscopy (FORS) is used to identify indigo and X-ray fluorescence analysis (XRF) is used to detect arsenic, which is an indication for the presence of orpiment (As2S3).

List of Prints

Below is a list of prints where indigo + orpiment was detected.

Pages in category "Indigo/Orpiment: Ukiyo-e colorant"

The following 58 pages are in this category, out of 58 total.

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