I purchased this Tire 50wt silk thread from Superior Threads. It a beautiful shiny thread and is heavier than the YLI Silk which is a 100 wt. I used a 14 quilting needle, Bernina BSR with stitch length 2.0 and the default tension of 4.0. I don’t know what brand of batting is in this sample but again think it is some sort of cotton.
I love this thread, the shine in incredible and it paired up nicely with the Bottom Line thread from Superior Threads that I used in the bobbin. The backtracking shows but doesn’t overpower the other stitching. You do get a heavier line of quilting than with the 100 wt. silk threads so this would not blend into the background as easily as the lighter weight ones – if that is what you want. It is a filament silk so is many long strands of silk fibers wound together. No lint left in the machine from this thread.
I would definitely use this thread again but will consider the cost and how large the project is to be quilted. Each of these 109 yard spools is $5.99 so the thread cost could be pretty high if you were quilting a large project. You might want to try one of the trilobal threads to get the very shiny look of silk but pay a lower cost per yard of thread.