Originally Posted by pattypurple

I tie with Perle cotton also. Use a surgeon's knot. If you Google it there is a YouTube link that shows it. It is basically a double knot that I've never had come untied. Be sure to check how far apart your batting can be quilted. My Grandmother always used yarn to tie and it formed little balls when it was washed. Looks old that way, if that is what you want.