I've been doing a little experimenting with strategies ond techniques for making ink..
One very shitty yet very free idea is ink pens, alcohol(or fingernail polish remover), and some dot 3 break stuff, I'm not saying it works well but it's more likely one would have the materials laying around. Ye just cut open the pens take out the little sticks inside and slice em into little 1" pieces, drop them in the fingernail polish remover, if its too thin just put more in =;} or let it sit along time, some evaporates and it gets thicker. This doesn't stay on shite forever, and is extremely messy, and stinks, but if you're too broke to buy other stuff, it, as they say, "works".
The others like the acrilic paint and rustoleum stuff i HEAR work good, never did it personally, but there's another on teh fly, d.i.y. recipe with spray paint, spray paint in a bowl or cup, add paint thinner and put it in a marker
As far as making markers, i steal highlighters from meh dah's girlfriend haha, pop em open and take the lil' spunge inside, soak it in hot (almost boiling perhaps) water, no need for soap, its just highlighter ink, after it comes out, put a little ink in the end near the tip, pour (bout 1/3) in the little plastic pin part of the marker, now just but it back together and viola. Keep in mind some highlighters (or dry erase markers) aren't air tight, many have openings in the felt part in between the sides near the tip, just mash up the felt a little and it usually expands and seals this gap, also making the tip bigger.
This is how most mine are made, I'm not saying it works well, but it does work and it's close to free, stealing pens from money tree, improvised thinner from girlfriends, markers from wherever else
So yeah, just thought I'd share, good luck wit' ye'r taggin' ye
:arrgh: