Re: Add metal ions to the complexity.


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Posted by Faery Ring on August 8, 2002 at 17:57:38:

In reply to: Re: Add metal ions to the complexity. posted by Catherine Cartwright Jones on August 8, 2002 at 17:27:54:

Titanium powder and titanium dioxide are different although I can’t
rule out a misspelling on the labels. Titanium is a highly reactive
metal. Also iron oxide is different from iron powder or iron
filings. It is the available metal ions that may be contributing an
electron to the lawsone molecule thereby causing oxidization. I have
read about one individual who tried mixing henna with water boiled in
an iron pot and had much darker henna stains.

I am not certain that the iron rich soil is going to increase the
lawsone or hennotannin content in the leaves. The lawsone molecule
doesn’t contain iron in its molecular structure. Despite that the
iron content may increase in the plant tissues in other types of
cellular molecules. When the leaves are crushed the increase in iron
may be a factor in creating a ‘browner’ stain. I know that iron ions
are definitely used in creating an ink called iron gall ink. The
mechanism may be similar.

http://www.knaw.nl/ecpa/ink/html/ink.html

 


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