You know, it could be a machine thing. Seriously. Maybe different machines handle different threads in different ways. Does that make sense? LOL!

Or it could just be the blue thread from Star. I had recently bought the blue and the pink. The fabric was a little bit different that I sewed these 2 colors on. But the thread when I pulled on it would break and fray. I don't think it was the machine. I think the thread was bad. My other color thread did fine and didn't break on the machine. I'll be checking them out, but think I will be using this thread for something else, lol.

I was using Coats & Clark but when I ran out of my navy blue and bought more I bought Mettler which is polyester. Most on this board swear by 100% cotton. I went with the Mettler because with the 1 fabric shop in town -- that's what they sell so it's readily available. If you get 100 different responses, you'll get 100 different opinions. I saw a post a while back that was very helpful to me and that was to look on the website for Superior Threads at their Education tab. There is a TON of information about thread there. I never knew there was sooo much to know about a spool of thread.

http://www.superiorthreads.com/educa...FZZM5QodQ12NLA

Hope this helps :)

I use Aurifil for both piecing and quilting (machine) and absolutely love it!

and i tried superior threads and hated them, paid big bucks for some yli quilting thread, it broke every 2 inches...
i am loving the threads from connecting threads.
but every machine has it's own mind, and some threads work for me and not for you, it really is a trial and error thing, try new threads when you come across them if they work, make note of it so you can buy it again, if it doesn't work, make note of that so you do not buy it again.