It's been re-listed if anyone's interested. Long story........In my limited experience with ink I've dunked a black bag that I didn't even know had an ink stain and a lot of it came off.....I kept dabbing it with a napkin afterwards and it kept coming off. Obviously an advantage it being black. Of course that wouldn't be the case on a lighter color bag to the same degree.
Good luck with it and please let us see it afterwards!