Quote Originally Posted by Tobus View Post
I ended up needing to cut about 10 inches of this RRS tartan for my quilt project, so I experimented a bit with the selvedge (which was trimmed off, not being useful for my purpose).

The white thread is not wool. It's some sort of poly material; a little stretchy with a slick feel to it. Maybe even silk?
I very much doubt that it would be silk. First and foremost, silk is much more expensive than wool so I cannot see why that would be used. Secondly, silk doesn't shrink like wool and would cause the selvedge to distort in the finishing process.