DevRam

I've been looking into DIY stick and poke tattoos and have decided to try one. I'm going to make ink from ash and water. I'm just wondering how to sterilize this. In some of the things I've seen online people use vodka instead of water. I'm assuming that's just for sterilization purposes so instead I'm just going to use water and rubbing alcohol(I'm thinking a teaspoon of 97%). Will this work?