Won't cut into anything...old quilter's tale. it's a finer thread is all...same as 40 wt poly, but finer. It can be used in the bobbin for embroidery...most newer embroidery machines call for 60-100 wt in the bobbin for decorative or embroidery work. It's also, as others said, nice for applique, and also for doing quilting if you are doing feathers, or tiny stipple...helps keep the build up to a minimum.
I also use Serger thread (oh no!! LOL) in the bobbin and for sewing at times. Does not work for embroidery bobbins though...like any 50 wt thread...when doing decorative (includes zigzag) or embroidery, will cause shredding and nests on the underside. Ugh...not a good thing for embroidery.
Marge
Originally Posted by
Scissor Queen
Bottom line is intended for embroidery. When you're doing machine embroidery and have a thread dense design you don't want the thread so thick on the back side.
I personally don't see much point to using it to piece with. Sure it's finer and you get more on a bobbin but at the same time you've got two different threads in your seam and one may cut the other over time.