Simply saturate the ink stain with either hairspray or rubbing alcohol then launder.
Step2
Done.
Step3
The hairspray will begin to dissapate the stain upon contact. If that doesn't occur, you can try using Goof Off. It's very harsh so I wouldn't use it on delicates but the hairspray should be fine as long as it's not on silks.
Tips & Warnings
Make sure your fabric will not react w/ the alcohol or hairspray negatively before you begin. Silk, satins, chiffons may stain from the hairspray alone. I would recommend trying this method on a small hidden area of delicate fabrics before use.