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.