replying to P van Rijckevorsel, Ryan wrote:
The purple is water or alcohol soluble. The wood gets banal when it is
freshly cut, or years and years old. If the former, just put it outside for a
couple hours. If the latter, just resand it down a touch. If you have a
black light, you can use it to see how much potential for change it has
remaining...you will know.

Once it's cut and shaped or whatever, it will be dull and will get brighter
all by itself. The sun helps quicken it, but at a cost. Think about, say, a
piece of white maple soaked in ooze from a glow stick, and you are trying to
make it glow at night for as long as possible. Purpleheart works the same
way. You *can* charge it in the sunlight when it is freshly cut or resanded.
You *can* heat it gently with a torch or oven or heat gun or lighter. You can
quickly wipe the piece with alcohol or acetone or dunk it in water to pull out
the water soluble dye. You can even use pressure to bring it out, but all of
those things are tantamount to wringing the good stuff out to the surface, so
that it can loose it's glow faster. The maple soaked in glow stick ooze will
shine the best and longest if you keep it dry, cool, and away from UV. It
will shine the brightest and then burn out if you heat it or blast it with uv.
Same reaction.

And don't use acid or base unless you wanna make it bone yellow or green/black
on the other end of the spectrum.

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for full context, visit https://www.homeownershub.com/woodwo...le-235968-.htm

On Monday, March 12, 2018 at 8:14:07 AM UTC-4, Ryan wrote:
replying to P van Rijckevorsel, Ryan wrote:
The purple is water or alcohol soluble. The wood gets banal when it is
freshly cut, or years and years old.

Speaking of "years and years old", did you happen to notice the date of the
posts in this thread?