Hi Paul. Welcome.
We had a thread here on this subject several months ago, during which several things were discussed.
Attempting to see if anything other than a dark closet would work, I give a sample of the wood to a friend of mine who is a phd microbiologist and organic chemist and is part of senior management for a major drug company here in New Jersey. He came back to me within hours on a Saturday afternoon with the identification of the actual chemical compounds comprising the red, known as "phenolics", but noted that their molecular composition is pretty fragile making them easily broken down by even weak UV light or heat. He was going to try to see if there could be some way to "fix" or preserve the color with an additive.
Last time I spoke to him he said he was having no luck thus far, and didn't seem hopeful. He mentioned that Pho's air brushed dye would most likely be the only way to preserve the "natural design" of the original colorings.
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