http://www.beadingdaily.com/blogs/inside_beadwork_magazine/archive/2012/11/29/stitch-pro-coloring-braided-beading-threads-like-fireline.aspx
UPDATE: Vicky DeAngelis is the person! Here's what she said in the Comments section of this article~
"That was me Jane...and you might want to mention that it is not just any colored markers, they are Sharpies. And the thread should be waxed."
Thanks, Vicky!
Written by Jane/Chilly Hollow
Blogging at http://chillyhollownp.blogspot.com
and at http://chstitchguides.blogspot.com
Written by Jane/Chilly Hollow
Blogging at http://chillyhollownp.blogspot.com
and at http://chstitchguides.blogspot.com