the solid scum that forms on the surface of a metal (as lead, antimony) when molten or melting largely as a result of oxidation but sometimes of the rising of dirt and impurities to the surface, sulametalli pinnale iseenesest tekkiv kiht (vrd räbu - sulametalli pinnale sihilikult tekitatud kiht). Räbu on alati pinnal, dross võib langeda ka põhja

the solid scum that forms on the surface of a metal (as lead, antimony) when molten or melting largely as a result of oxidation but sometimes of the rising of dirt and impurities to the surface, sulametalli pinnale iseenesest tekkiv kiht (vrd räbu - sulametalli pinnale sihilikult tekitatud kiht). Räbu on alati pinnal, dross võib langeda ka põhja