Taking one of the 2-plys previous spun (blue wool + copper (S-twist)) and ply together in the opposing direction with a previously spun single (spun in the other directing to match twists)
Taking one of the 2-plys previous spun (blue wool + copper (S-twist)) and ply together in the opposing direction with a previously spun single (spun in the other directing to match twists)
Blue wool, copper thread
2-ply (one of the singles a previously spun blue wool and copper s-twist)