To remove ink stain from a t-shit, you need to begin by spraying the stain with a short burst of hairspray. This will help loosen the stain. In a bucket, put in cold water and add in dish washing detergent and white vinegar and then oak the clothing for about 30 minutes. Wash it and check whether the stain has cleared. In case it is visible, rub it with alcohol and this should be able to clear it. Get additional details from http://home.howstuffworks.com/remove-ink-stains-from-cotton.htm.