The Kreinik blog has a terrific article on laying tools and using them to smooth threads. It explains why you would want to smooth a thread and shows you how to turn items you already have into inexpensive laying tools. There are links to further information at the bottom of the article as well.
http://kreinikthread.blogspot.com/2017/06/the-easiest-way-to-make-prettier.html
Written by Jane/Chilly Hollow
Blogging at http://chillyhollownp.blogspot.com
and at http://chstitchguides.blogspot.com
© Copyright June 7, 2017 Jane M. Wood. All rights reserved.