A colleague stained his pants with ball-pen ink, and WASHED them before noticing. He said that he already tried soap, acetone, gasoline. Any idea proved to be working? I already suggested him hydrogen peroxide (H 2 O 2 ) and WD-40 - just as generic substances, not at all tested. I do not know what kind of pen / ink was in that particular case. Of course, he hopes to avoid using scissors, fire... :)
Originally asked by virolino on Stack Exchange (lifehacks) (CC BY-SA 4.0).
