Launi roba fesa Mai rufi malleable karfe bututu kayan aiki wani irin malleable karfe bututu kayan aiki.Ya ƙunshi Layer baƙin ƙarfe mai yuwuwa da launi fesa launi.Launin fesa launi yana saman saman, kuma kauri mai launi mai launi shine ≥100/μm.Yana da abũbuwan amfãni daga m tsarin, acid da alkali juriya, bakin ciki, babu yayyo, dogon sabis rayuwa, da kyau bayyanar, kuma za a iya amfani da daban-daban dalilai.