L.P.
Carbona stain devils. Little yellow bottles I get them at walmart near the dyes. I have not used the one for ink but have used the one for colors thta ran on a quilt I was cross stiching and it put everything back where it belonged like magic. Some people will say hair spray but I never had any luck with that on ink. If the shirt is plain white and you can not get the ink out then at a girl scout meeting have all the girls bring an old shirt and get fabric pens and let them decorate them up you can camouflage the stain.