okitew
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In search of fading pigments
I'm looking for a pigment that will permanently disappear upon exposure to light/UV, say after a few hours.
Ideally, this pigment will be dark initially, cheap, and nontoxic. Any ideas?
The best option I've found so far is chlorophyll, but I need something darker that will fade more quickly.
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Mr. Rogers
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Nope! I never signed that contract!! See...
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okitew
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lol.... Nice.
But no, I actually need it for an obscure photography application.
Actually, I'll go so far as to say that it would be key to a new photographic process, and that I'd share that process with whoever submitted a
workable solution, and if they think it's worth patenting, I'll support submitting it as a joint patent.
Disappearing ink won't work afaik because it must fade from light exposure only while dry.
[Edited on 23-4-2019 by okitew]
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phlogiston
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rhodopsin
methylene blue
You can also combine a radical-generating photoiniatior (eg benzoylperoxide, hydrogen peroxide, azobisisobutyronitrile, titanium dioxide) with an
organic dye sensitive to radicals.
You may find this paper interesting:
Photoassisted bleaching of dyes utilizing TiO2 and visible light
Epling GA et al (2002) Chemosphere 46:561-570
http://nathan.instras.com/documentDB/paper-253.pdf
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"If a rocket goes up, who cares where it comes down, that's not my concern said Wernher von Braun" - Tom Lehrer |
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okitew
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Why didn't I think of that? What can't that stuff do?
Quote: Originally posted by phlogiston  | You can also combine a radical-generating photoiniatior (eg benzoylperoxide, hydrogen peroxide, azobisisobutyronitrile, titanium dioxide) with an
organic dye sensitive to radicals.
You may find this paper interesting:
Photoassisted bleaching of dyes utilizing TiO2 and visible light
Epling GA et al (2002) Chemosphere 46:561-570
http://nathan.instras.com/documentDB/paper-253.pdf |
This is useful. Thanks! |
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