First, blot the area with a clean white dry towel. Then apply rubbing alcohol to the affected area, blotting gently. Another trick is nail polish remover, use gently.
An excellent way to remove ink stains is to use rubbing alcohol -- put some on a cotton ball, and gently blot and smooth away the stain. Works every time!
One way to achieve this is to use rubbing alcohol, that is, if the stain has not set. The alcohol will neutralize the ink's pigmant and dissolve the stain.
Ink is one think that is really hard to get out of clothing. Once you get it on clothes its not gonna come out. Try taking it to the cleaners and ask them what can they do to get it out.