Smocking stitches are accomplished with frequent embroidery thread. On silk clothes use silk thread and on cotton fabric use cotton thread. It is really easiest to modify to a new bobbin between rows. Having said that, for those who operate away from elastic thread mid row which is ok. Just https://coveredspandexyarn79999.ivasdesign.com/53496350/smoking-thread-can-be-fun-for-anyone