Originally Posted by
sewbizgirl
The twist is the same from either end.
Actually, it's not. Thread is wound directionally. If you load the needle from the end that comes off the spool, then the twist of the thread goes WITH the direction of the pull. If you load it from the other end, then the twist of the thread goes AGAINST the pull - think of it like quills on a porcupine or scales on a fish.