I've just warped up with 120/2 silk for the first time, and am having hellacious problems with threads breaking. I've backed off the tension to the point where it's practically mushy, and I'm beating in between picks to clear the shed - that seems to work best for avoiding broken threads, but it's also very slow, and I still break a thread every inch or so.
I'm using an AVL Workshop Dobby Loom, 24" wide, with a live-weight tension system, using a 5-lb weight for a 12-inch warp. This is a 3-yard sample warp for the finished piece, which I expect to be about 20 yards of fabric (thus the distress over breaking threads!).
Any thoughts on what else I can do to prevent this warp from breaking? I could try treating it with sizing, is that likely to improve things? I have some spray starch I could try...or I could buy some gelatin, I suppose...