The Russian Join is particularly helpful when:
- You are joining non-felting yarn (to use instead of a spit-splice)
- You are joining fine-weight yarn, such as fingering or lace weight
- You are conserving yarn - there's very little waste.
I'm using a regular tapestry needle & Cascade 220 yarn (worsted, 100% wool.) With finer yarn, I like to use a darning needle, which has a sharper point.
Weave the tapestry needle in and out of the yarn - you'll be stitching the end of your strand of yarn back down into itself. For loosely-plied yarn, you should stitch at least a couple of inches. (Farther than I show here.)
Pull the end of the strand through your stitches, forming a loop.
Thread the new strand (pink for illustrative purposes) through the loop you just made.
Stitch the yarn end back into itself as you did before.
Pull the end of the strand through.
Pull the ends of the yarn so that your loops close, but don't pull tight. You want the yarn to lay flat and not bunch up.
Trim the ends close to the yarn join.
Ta-da! Continue knitting or crocheting.
After you have worked through this join, tug your fabric a bit lengthwise & width-wise. A couple of ends may poke out. Just trim them down, eventually they'll work to a resting place.
Thanks to Angelique, who originally showed me this technique. Miss you, Angelique!