I learned something about getting ink out of Sharpies way, way better.
Listen close all you lovers of alcohol markers.
Today after breaking (accidentally) an orange sharpie, intending to take out its reservoir safely, I then realized that there was a seam on its end. A blind cap of sorts. Turns out it's melted on, and really soft. It's very easy to cut off with a simple blade, if you can find the seam. This ruins the marker, but hang on to the body just in case, and absolutely do keep the nib. You'll be needing it later after so many refills.
So, get a 30mL container (HDPE is best, twist cap, not live hinge. I don't trust live hinges) depending on the marker, you'll be filling it up more or less (blue, purple, yellow, and brown are very, very saturated. Black is less saturated. Lime, Green, Turquoise and Orange are the least saturated of the "core 12"). With 99% pure Isopropyl (the purer the better in its behavior in the pen and on paper) and an eyedropper, drip into the butt end of the reservoir. Don't try to force the alcohol in, let it do its own thing. Depending on the color, it varies how long this will take. The more dense the color saturation, the more alcohol, the longer time.
It'll come out really saturated at first, then less so. If you overflow the reservoir, the clean alcohol will go down the outer sides of the reservoir and go out over the top of the point. Up to you how saturated you want your dye to come out. With the hole in the back, it's really good to sometimes put the marker down and let it resaturate itself, and also to carefully (aim first, push down cap second) push the cap over the hole in the back to force more ink out. You can let it drip or touch the point to the inside of the container to make it come out faster. When it comes out thinner, you might want to put the marker down for a moment, and then push the cap over its end. Repeat until the point lays down a really pale mark.
The extracted dye will be more or less just about at perfect saturation for artistic use instead of superultramega oversaturated like it is by default. If you take color swabs, you'll see it looks pretty nice. It'll be easy to measure this ink out for mixing or further dilution.
Why didn't I realize this years and years ago.
Oh, and do it near an open window or outside, of course. But it's pretty safe.