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

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== Analysis ==
 
== Analysis ==
Gamboge does not fluoresce under UVA radiation and does not produce a distinct pattern using Excitation Emission Matrix (EEM) spectroscopy. Of the possible yellow colorants analyzed, it is the only bright yellow colorant that does not fluoresce but also absorbs the UVA induced fluorescence emitted by the paper. This negative indication was sometimes used to assign the presence of gamboge.
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Some of the other organic yellows, like pagoda tree and rice plant, but fluoresce weakly in ultraviolet light. Chemically, these two compounds are both flavonoids and and only have slight differences in their EEM plots. Thus, the decision was made to call them by their chemical name, flavonoid, to minimize mistakes in identification.
 
<gallery mode="packed" heights="200px" style="text-align:left;">
 
<gallery mode="packed" heights="200px" style="text-align:left;">
 
Gamboge color.PNG|<center>3D EEM plot of Gamboge</center>
 
Gamboge color.PNG|<center>3D EEM plot of Gamboge</center>

Revision as of 12:49, 18 May 2020

Great Wave by Katsushika Hokusai

Flavonoids: A group of organic yellows.

moutain peach

For more information see: Flavonoid, Gardenia, Kariyasu, Pagoda tree, Zumi

Examples of Flavonoids 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

Some of the other organic yellows, like pagoda tree and rice plant, but fluoresce weakly in ultraviolet light. Chemically, these two compounds are both flavonoids and and only have slight differences in their EEM plots. Thus, the decision was made to call them by their chemical name, flavonoid, to minimize mistakes in identification.

Other Images of Flavonoids

List of Prints

List of prints where indigo was detected

Pages in category "Flavonoids: Ukiyo-e colorant"

The following 51 pages are in this category, out of 51 total.