KP1019 is able to untwist and bend DNA weakly. As the two halves untwist, they furl together to create the final structure. The best thread for tatting is a "hard" thread that does not untwist readily. The halves are combined together and allowed to untwist under weight or tension. This fills all the gussets around the cores and ensures that the cores cannot untwist. There is no way to untwist the bands without rotating the cup.