Sulky may make some rayon thread but is is not all rayon. I was advised to use Sulky Polylite to FMQ and I have had wonderful results with it...not a single feather, knot or thread break with my Janome 6600 or my Bernina 530. I give at least partial credit to the thread which gave such wonderful results to this klutzy beginner. I had good results with Aurifil 50wt too.
My machine (6600) did NOT like Bottom Line and broke repeatedly, even with a size 90 large eye needle. My normal size is an 80 large eye Organ needle. I know others who use Bottom Line in their 6600 (top and bottom) successfully. They key to success is to try different thread/needle combinations and find what works for you.
Originally Posted by
Candace
Sulky is rayon and a weaker thread. I wouldn't use it to quilt a quilt that is used and washed often. I'm not surprised you're having problems with it. I use good quality, cotton thread like Aurifil.