White Under Color

I've heard of a process where an artist can use white before applying color to create sorta a gost like shadow underneath a color tattoo. Kind of an outline thats reconizable but not prominent in the tattoo. Has anyone else heard of this or experimented with it? If so I would greatly appriciate any information on this process. Thank you.

Hey Alf...me again!... White pigment can be used to create several different and quite unique effects...just make sure you have an artist experienced in using white in different effects...don't let anyone experiment on yer skin!!!...TAz