For washing silk, it's best to use a gentle, silk-friendly detergent specifically designed for delicate fabrics. Look for detergents labeled as mild, gentle, or formulated for silk and wool. These types of detergents are made to preserve the natural fibers and maintain the integrity of the silk, preventing damage during the washing process. Avoid detergents with enzymes, bleaches, or strong chemicals, as these can break down silk fibers and cause fading or weakening of the fabric. Brands like Woolite, Ecover Delicate, or The Laundress Delicate Wash are often recommended for silk care.