To make alcohol ink I used a pliers to remove the tip of a dried up Sharpie permanent marker.  I used a tweezers to remove the ink cartridge nub, I placed that whole thing in the small bottle and added 91% alcohol half way, after a week I thought it didn't look dark enough for the amount of alcohol so I added another ink, now it's very dark, it worked great in resin.   I had no mess, I didn't use rubber gloves, but one I had to brake it in half to get the ink cartridge out, I used a scissors to cut it in half.  These are dried up markers so when I broke it in half ink did not squirt out.  Many people asked me how to do it, I hope I explained good enough.