It is a mis-conception that silk is more durable and stronger than wool. Once in a while we receive old and antique tapestries for cleaning and repair. In many cases, the wool parts are in better conditions than the silk parts. Here I am posting pictures on a cushion and an antique 18th Century tapestry with rotten silk parts. The wool which is dyed is still intact while the silk (un-dyed) is very weak and rotten and this makes our restoration job much harder. We have marked the damaged areas with safety pins and red small balls so we do not overlook them in our restoration process.
Dr. Khosrow Sobhe (Dr. Kay)
Certified Rug Specialist (CRS)