[ quick wo^ js a ticke:,lor number. CORTICELLI FILO SILK. Washing Colors. These goods are adapted to a wide range of art needle-work. For light and delicate embroidery use the threadsingly; for heavier work use two threads in combination. … Filo silk may now be bought on spools, which keep the silkclean and prevent shopwear and fraying. In this way yousave time and money, by avoiding waste and inconvenience,at the same time improving your workmanship.