Try the following to remove pen ink stains from clothing.
Remove pen ink with hair spray
To remove the pen ink stains use hair spray to completely drench the stained area. Then, with a bar of bath soap, rub the area vigorously. Rinse with cold water. Then put it into the laundry or dry clean.
Remove pen ink with milk and vinegar
Undiluted white distilled vinegar when mixed with millk, 50/50, can be used to remove ink stains. Apply the milk and vinegar to the stained area of the clothing and let it soak for 10 minutes. Under cool running water rub the stained area for a few minutes. Place your clothing in the laundry and wash with normal detergent.
Undiluted white distilled vinegar can be used for coloring easter eggs - canning - pickling - marinating - removing beer stains, remove grass stains, candy stains, coffee stains, deoderant stains, removing human urine smell, feces stains, remove cat urine smell, mustard stains, remove rust stains, sweat stains, tea stains, remove urine stains and for cleaning shower heads to remove blockage.