In fact, there is a way to naturally remove blood from silk without using anything else, and that is saliva.
Saliva is the source of digestive enzymes that the human body almost constantly produces. The enzymes in our saliva are designed to break down starch, sugar, fat, and other organic substances-many of which are found in the blood. Therefore, a rather unorthodox method of removing dried blood recommended by a silk expert is to use saliva. Put the saliva on the cotton swab and pat it gently until the blood on the silk disappears. Use a fresh cotton swab every time you apply saliva, then rinse with water.
Might as well try ROSEWARD silk products when you’re in trouble, maybe this is also a good idea.