open the seam up the back of the tie- remove the lining- wash the ties- use a lightweight stablizer (a fusable is often used) refold if you want (your pattern needs you to- or use the silk unfolded- you can cut them up- do what you want with them after removing the lining and washing them-
i put mine in a mesh bag and toss them into the washer-they came out fine-
ties are a great source for silk- you get alot of fabric out of one tie - once unfolded they are usually between 54" & 60" long- and the wide end can be 10" wide!