[Originally published August 2006]
For this mini tutorial, Fiebings Pro Dye is being applied with a brush.
(In 2006 it was still labeled as Oil Dye, but that really only referred to the fact that they used an oil pigment in the dye - it is still just an alcohol based dye.)
The same technique would be used with water based dyes - water based dye tends to flow a fraction further than alcohol based dyes, so test it first.
The background of an inverted carving is being dyed - the design is left natural. Take note how the fully loaded brush is never set down right next to the edge of the area to be dyed - this is to prevent the dye from bleeding into the area that has to remain dye free.
Because the black dye in this case is quite forgiving, mere application of the dye will ensure even coverage. So as the dye in the brush is used up, the brush is brought closer and closer to the edge of the design. [No sound on the following video]
(Updated 26 October 2019)