S.R.
I used to work in an office and got ink on my clothes plenty of times.
Hairspray works like a charm, as a matter of fact as you spray it on you will literally see the ink start to disolve. The only problem I can see you having is that you say you already dried the clothes. If it was in a dryer...it may be harder to get out. Still try the hairspary....it won't hurt and will wash out easy. Just don't keep putting the clothes in the dryer...it will just set in the stain more.