AAAAAARRRRRRGGGGHHH!!!!!
I hate, hate, hate when supposedly water resistant ink turns out to be not water-resistant at all when you use it. I know, I know you should test every contingency, but I unwisely (very, very unwisely) assumed that when I put that black ink on paper with paint (the goal was to then scratch in the black ink) it would then be possible to paint some water-soluble color on top of the scratched off areas.
However it turns out that this black ink will get liquid again when painted on if it is painted over other paint. So the black seeped back into the areas that I spent hours carefully scratching and crosshatching a picture into with a razor blade. It was a Robin portrait that looked rather cool with the white on black, and I just wanted to give it some red and yellow color highlight effects. Now it is a blotch. Well, not completely a blotch, I may be able to rescue something, but it certainly won't look like I wanted it to... waaah!
Of course I should know by now that it always comes back to bite you if you are too lazy to actually test how different colors react onto each other, and just assume that they behave in a certain way, but still.
However it turns out that this black ink will get liquid again when painted on if it is painted over other paint. So the black seeped back into the areas that I spent hours carefully scratching and crosshatching a picture into with a razor blade. It was a Robin portrait that looked rather cool with the white on black, and I just wanted to give it some red and yellow color highlight effects. Now it is a blotch. Well, not completely a blotch, I may be able to rescue something, but it certainly won't look like I wanted it to... waaah!
Of course I should know by now that it always comes back to bite you if you are too lazy to actually test how different colors react onto each other, and just assume that they behave in a certain way, but still.