Originally Posted by kathy
I would use a mid weight cutaway for the bottom and a water soluable over the top, bobbin thread is usually white or black 70wt, it blends in with almost anything and isn't really noticed.
what machine do you have? I have a Singer Futura
I use water soluble on top and mid weight tear away on the bottom, but I match the bobbin cotton with the top. That way it looks right both sides of the item sewn.