Letraset fixing advice anyone?

[whiskyinmind.livejournal.com]

Hi all! I have a random question for y'all. I'm currently making knotted bracelets with lettered beads for fandom friends and am wondering if anyone has any advice on how to permanently fix the lettering? I'm using dry transfers (Letraset and the like) on smooth glass beads. I've tried fixing with PVA/craft glue and artists varnish and while both work, they're not as permanent as I would like them to be.

Here's an example of one of the bracelets so you can get an idea of what I mean.



Thanks for any and all advice folks!