with 90% of the commercial silk coming from the mulberry silkworms, it's rare to find any other kind of silk...I found an interesting article talking about silk saying, "Silk loses strength over time if kept in bad storage conditions...and weakens eventually if constantly exposed to strong sunlight (eg curtains). It is however rarely affected by mildew and unharmed by mild alkaline solutions or standard dry-cleaning processes."

With this in mind, does anyone know why you are not supposed to 'dry-clean' silk rugs?

http://www.sabahar.com/docs/An%...ducation%20to%20Silk.pdf