Originally Posted by
feline fanatic
If I start breaking thread with Invisifil I loosen the top.
going back and re-reading my response, it is confusing. What I meant was I loosen the whole quilt sandwich so it isn't so taut on the rack. Even looser than being able to easily grab the first knuckle of my finger when poking from the bottom of the sandwich to the top. Having your quilt sandwich loaded too tight can cause thread breakage with the super fine threads and even more commonly used threads.
Additionally the super fine threads (like decobob, invisifil and 100wt silk) are better suited for dense background fill quilting where there is a lot of back tracking and thread build up and you are quilting densely. I would not recommend using these threads when doing an all over E2E or panto type quilting. They are meant for fine detailed work where you are tending to go much slower. This may have also contributed to your breakage. You would have to be using a very heavy thread to overpower piecing with quilting when doing an E2E. I have used heavy King tut cotton in an E2E and it did not over power the piecing. Here is a good example:
Barnbum's "Indian Summer" quilted by Feline Fanatic
Really surprised the "thread dealer" didn't understand this.