Questions

Now that I'm studying tailoring, I've noticed things I hadn't even looked at before, like how some stitches seem to squeeze the fabric, particularly on knits. It got me thinking, and that lead me to a question that sounds a little stupid; do thread manufacturers shrink the thread before shipping it?

So, follow me on this; you pre-shrink fabric because you know it will shrink when it's washed but, if the thread isn't pre-shrunk, wouldn't it shrink and cause the thread tension to tighten? That said, how the hell can someone pre-shrink thread? 🤨🤔