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.

4.Selvedge will depend on end use of fabric secondly on economy of production. Different types of selvedges: 1. Plain selvedge 2. Tape selvedge 3. Split selvedge 4. Fringe selvedge 5. Fused selvedge 6. Adhesive finished selvedge 4. Thread Count: Thread count or fabric count is determined by counting the number of warp (Ends) and wefts (picks) per square inch of fabric. Higher the thread count more compact will the fabric be; so it will be more strong and durable. A fabric with high thread count will be more costly. It is denoted by X � Y, eg., 50 �30. Compact fabric shrinks less. Based on thread count there exists balanced and unbalanced constructions. When number of warp yarns are equal or nearly equal to the number of weft yarns, the construction is balanced and when the difference between the number of warp and weft yarns will be very large than that construction will be an unbalanced construction.