How to clean the mark by carbon pen???

@HeidiD (167)
China
August 3, 2009 9:42pm CST
Several days ago, I carelessly drop my carbon pen from desk. Unlucky,It has left a mark on my shirt. I first used washing powder,but no effect. Others told me to use soap or soap power. I tried and tried, however, The effect is not highly visible. Do you have any good idea? I'm awaiting you~~~
No responses