Quilt labels are the bane of my existence. I usually use T-shirt transfer onto white fabric because you can get a nice clear lable.
Problem is it takes several attempts to get a good transfer. I'm trying to make labels today and I've got a mess - wasted transfer, wasted fabric because the transfer didn't work properly. Now I've got to boot the laptop, print the labels again and try it again.
I'd use permanent marker but it never looks nice on the back of the quile.