Originally Posted by
SueSew
I have tried So Fine which is a thinnish 50-weight poly thread. It is good for FMQ, SITD ETC as it is fine. I am 'graduating to Bottom Line which is even thinner so hopefully mistaKes will show even less.
I did not like it for piecing. At all!!! I had through it would leave a flat seam when I pressed the seam to the side. It did, but it seems to have a life of its own - instead of sitting docilely like my nice well-behaved Aufil #50 cotton does at the end of a piece, it seemed to wriggle right out of the end of each joined piece, leaving the two pieces less than perfectly joined at the ends. Even leaving the threads longer didn't work as they just slid right out of place. To add insult to injury, when I cut the thread with my handy Janome thread-cut button, the Sooooo Fine would sometimes wiggle right out of the needle and make its merry way up around the needle toward the slots 5 and 4 where it came from.
You may have better luck - I am challenged with clutzy fingers.
If the thread is coming out of the needle when using the thread cutter you might try loosening the upper thread tension. I use So Fine for all my piecing and love it. Poly thread tends to untwist when cut at the end of a seam, so I always sew off the end about 1/4". Its the nature of poly. Cotton does not untwist. Another thing about the So Fine, if using too much heat, it can take on another life. It hasnt happened to me, but on Superiors website, they warn of it. Linda