Quite possibly only something like 5% maximum silk content. Clean following wool safe practices, keep the moisture to very minimum and use acid rinse & turbo dryers. You need to watch for browning (which won't happen at the time, it'll be a call back the next day).
I cleaned some shaggy wool rugs at the weekend with additional silk yarns mixed in between the shaggy wool bits. One of the rugs had been in front of a fire and was almost black - with a nice clean square where the kindling basket had been stood!
Balls out, Ultrapac renovate and plenty of acid rinse with the truck steaming hot... results actually shocked me, perfect.
However, all brown down one edge in the morning - must have not got the acid rinse through it in that spot

Thank god for acetic acid
