Review on Ranger INK25207 Inessentials Pen White by Karla Richter

I was looking for a white pen/marker to do extra detail and got this after several websites gave good reviews. This. didn't work for me at all. I used a black Sharpie marker and used a white pen to draw over it (dry ink on bristol paper) and all I got was a mess even without the white line. Have used it on other paper surfaces and there was no line at all - even over Copic markers. No ink was visible or just a dirty line. Maybe I'm doing something wrong or I have a really bad set of pens. It's time to look for something else.