I tried this once and it took almost half a day for a whole skein because you have to go in small sections, then untwist, then proceed again. I refused to do it after that lol. Also, it’ll obviously depend on the yarn composition (I would only dare to do this with cotton, polys, linen, and silk).
Splitting worsted weight yarn involves carefully separating the individual plies that make up the strand. To do this, gently pull apart the yarn with your fingers, teasing it into the smaller strands without tugging too hard to avoid fraying or breaking the fibers. This technique is useful when you want to create a thinner yarn or blend different colors by plying separate strands together. It can take a bit of patience, especially with tightly spun yarns, but working slowly and evenly will help maintain the yarn’s strength and smoothness while giving you more versatility for your projects.