A very experianced tattoo artist that I know said that white ink is translucent, rather than opaque. That means that if you have brown skin it won’t bleach it white, but just lighten it. A perusal of Suicidegirls shows quite a few girls with gorgeous white ink as part of a tattoo. An all white tattoo, several years old, on a pale friend of mine, looks rather like a network of beautiful gothic scars. Which has it’s own appeal.