Test the tension of the bobbin thread by pulling the thread end gently. There should be a slight but noticeable tension and bobbin should stay firmly in place. Leave a thread end 3 or 4 inches long extending from the bobbin case. Now open the slide plate lift the latch on the bobbin case with your thumb and forefinger and insert the bobbin case into the machine.
Properties of Satin weave: 1. Right and wrong sides look quite different. 2. Very low abrasion resistance. 3. It has interrupted diagonal discernible with magnifying glass. 4. It is more expensive. Excellent lusture.