Originally Posted by armysniper
You can buy pre-wound bobbins in bulk. Saves time from winding your own. I usually keep a black, natural and white on hand.
My Juki came with about 100 pre-wound bobbins - all white. The bobbins themselves are made out of a cardboard-like material, and I have no idea what they're wound with, but I still have 6 empty metal bobbins too. I'm guessing you'd use the pre-wound bobbins for common jobs, but if you need a certain color, you wind your own - am I right here Dan & Sniper? (Told you I'm a newby.)
For the record - you guys not only rock, you roll too!