If your tension is properly maintained, you may be able to weave in and end your thread without even tying any knots. Using a thread burner can also help to create a small, melted "knot" that will keep your beadwork secure.
From Jennifer VanBenschoten, former About.com Guide
If your tension is properly maintained, you may be able to weave in and end your thread without even tying any knots. Using a thread burner can also help to create a small, melted "knot" that will keep your beadwork secure.