http://therockcolumbia.com/watercolor-markers/
Watercolor Markers
What is the best record in places, Fine Point markers in black?
I made something up on watercolor paper in a black Fine Tip marker. No I want to ruin the image, so I do not want a marker that bleeds into the paper, like a Sharpie. Sharpies NO !!!!!! that bleed! I tried sharpies in previous projects and bleeding horribly in the paper! going to ruin my plan if I use a Sharpie … sharpies not !!!!!!!!!!!!!!!
Microcon pens.You can get at any art store. They are not cheap, but well worth the money. I just used them for the same. They are waterproof and permanent. Come in sizes and are very dfferent tip used to use. Good luck!