The most intimidating thing about a permanent ink stain on fabric is the permanent part. Fortunately, a permanent ink stain doesn't have to be permanent. These stains, as frustrating as they may seem to be, are actually easy to remove with the proper materials and know-how. It only takes a little time. Suddenly, permanent ink stains aren't so permanent anymore.
Set the fabric, stain side down, on a stack of about 3 paper towels. Pour a small amount of isopropyl alcohol onto the stained area and push it through the fabric with a separate paper towel. Change out the paper towels as needed and continue to add more isopropyl alcohol until the stain is gone.
Set the stained area of the fabric in a bowl of milk and allow it to soak. Change out the milk when it gets dark from the ink. This could take several bowls of milk until the ink is gone. Launder the fabric when the stain is removed.
Apply nail polish remover with acetone to a clean cloth and gently blot the stain. Allow the stain to soak for at least 10 minutes before washing the fabric.
Mix together 1 part ammonia and 2 parts water. Apply this solution to the stain with a clean cloth. Allow the stain to saturate for 5 to 10 minutes before laundering.
Make a paste of Oxy Clean and water. Apply it to the stain with a clean cloth by gently rubbing it in. Allow the paste to sit on the stain for 5 to 10 minutes before laundering.
Washing the fabric without attempting to remove the stain first will set the stain in permanently.