Here's what Superior Threads has to say about their latest video. "In Video #26, Bob Purcell (Chief Threadologist of Superior Threads) discusses Superior's Thread Selection & Troubleshooting Guide. Using these guides will allow you to choose the exact fiber, weight, & sheen, to select for your end goal. The Troubleshooting guide is an excellent tool to use when figuring out any problems when sewing/quilting/embroidery."