It’s a thin piece of salt, and it’s between them. It provides the cream of Pilate in certain ways, including protecting itself from events when they are asleep. To exploit the " Silk" fibers in particular, they heat the Pilate so that the silkworm dies inside it then call it "absortion" and gravitate to get silk fibers to white, yellow, brown. In the province of Kerman and some other places, they are called “Praise”.