It's really almost invisible & I think it would be fine to leave it as is. If you're pretty sure it's ink, the best way to get out ink is with hairspray. Just spray a little bit on the dry quilt in that area & gently rub (either rub against the quilt itself or rub with a soft white cloth). When all the ink is gone, you can wash the quilt -- or just spot wash the area with a teeny bit of laundry soap & cold water to remove the sticky hairspray. Works every time & I've yet to see it damage any type of cotton fabric.
Last edited by Bree123; 08-02-2016 at 06:26 AM.
Reason: fixed typo