If you work with yarns you must sometimes join two ends, e.g. if the yarn broke, the ball is finished or the like.
With some (nature) yarns you can ‘cold felt’ them, with others it doesn’t work.
Recently I learned about the braided yarn join and it seems to work great, many think it’s the best for joining fine yarns.
Links:
Braided Yarn Join (Joining Yarn – The invisible Braided Join with 1 color yarn – Knitting and Crochet) (Video)
via: Joining Lace Weight Yarn – Specifically the slippery stuff!
Here at unikatissima:
Joining Yarns