Silk organza or organdy is the best choice for fine silks. Pre-shrunk muslin and fine hair canvas are good choices for heavier fabrics. If added body is desired, silk organza, organdy or pre-shrunk muslin may be used. On light weight silks, French or flat felt seams are best. On heavier silks, use the bound or Hong Kong seam.
Silk can ravel.
If you have a surger, surge. Yes, most silks are washable. Wash in cool water. Use soap or a mild liquid dish washing detergent. It is not necessary to use specialty cleaning agents.