How do you thin tattoo ink?

For the most part, when you are wanting to dilute the ink you will use small amounts of Witch Hazel to water it down. You can also use distilled water. In the event of you doing soft gray shading, you will want to use the witch hazel to dilute the black. The witch hazel will reduce the redness of the tattooing while you are doing it, and will allow you to see more clearly the black that you are building up in the skin.