I use the crochet yarn / string too and love it!! Super cheap for a huge roll and for me it's easier to cover with my center knot than organza!!
Originally Posted by Ste1977
I do both depending on what type of bow I'm making. For the ones I tie I use the cotton crochet yarn that's sold at walmart. In every walmart that I've been to it's on the bottom shelf where the yarn is. It's almost like string and is pretty inexpensive. For others I use the button thread, go through the center of the bow, wrap, pull and tie off