There are different methods for removing ink stains from fabric depending on whether the fabric is washable or non-washable, according to HowStuffWorks. The type of ink determines how easily a stain can be removed, notes About.com.
To remove water-based ink stains from washable fabrics, the best method is to first blot the fabric with a wet cloth until no more ink comes out, states About.com. The stain should then be soaked in a small amount of laundry detergent and then the fabric should be washed at the hottest possible temperature for the type of fabric.
For ballpoint or permanent ink stains, blot the stain with rubbing alcohol, then soak the fabric in detergent for a few minutes and washing it with hot water, as recommended by About.com If rubbing alcohol doesn't fully remove the permanent ink stain, blotting with nail polish remover or acetone may be used as a last resort. However, these can potentially damage certain types of fabric, so it is best to test them on an inconspicuous area first.
For non-washable fabrics, there are several different cleaning methods, according to HowStuffWorks. One is to simply sponge or blot the ink away with water. If this doesn't work, rubbing alcohol, vinegar or ammonia may also be used on tougher stains. Another option is to try to loosen the stain with hairspray.