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Re: Old workbasket pattern help please..
A lock join is a join that the core thread makes to a picot below it. Lock joins occur when two elements are facing in the same direction ( with the caps up).
In this pattern, when the chain comes over the top of a repeat the DS are in the same orientation as the DS on the rings, so the core thread needs to make the join, since in tatting, the two closest bits of tatting are what make the join.
To make a lock join, bring up a loop of the core thread through the very small joining picot on the ring below. Then bring the shuttle through the loop. Pull up the loop to tension it and hold the base of the loop in the pinch, then slowly close the join. It helps to have a nice snug lock join if you pull the core thread to the left.