Originally Posted by
Pam B
I have been told in quilting classes that one should NOT use pre-wound bobbins for piecing or normal sewing as the thread on them is not of the same weight as what you are stitching with on a spoil. They are meant to be used for embroidering.
I have to respectfully disagree, and I also teach quilt classes, as well as work on the vintage machines. While I do not use pre-wounds, it is because I do not have a machine that will take them. I do use the thinner bobbin thread on nearly all of my work now, from piecing to machine quilting. Yes, conventional wisdom is to use the same thread on top and bobbin, and I do this when balancing tension on machines that are in for service. However, so far I have had no difficulty when switching to the bobbin thread. Yes, sometimes a tension adjustment needs to be made, although that has not been anything major nor difficult.
And embroidery thread is usually much heavier than bobbin thread.