This morning I am starting a new round on a doily in one of the Korean books I have. I love the patterns in those books. And the books themselves are so nicely done. The book I am taking this from is Lovely Tatting Lace, Vol.2. You can get it from Lacis.
What I do is make the first ring, tatting over tails. I leave a small loop at the beginning, like I would do if I were starting a chain. Once I close the ring, it is time to add the "ball" thread on. I slip that up through the loop, then pull the loop closed with the tail I tatted over. Now I have the "ball" thread attached and as I start making my chain, I just tat over those tails also. There is no knot at all. Does anyone else do it this way? I think it makes a very neat, clean join. Now if I can just find a way to do a final join in a round that is as neat and clean!