Lalacewar yawanci sun haɗa da: fadowa kashe, scratches, passivation spots, zinc barbashi, lokacin farin ciki gefuna, iska wuka ratsi, iska wuka scratches, fallasa karfe, inclusions, inji lalacewa, matalauta yi na karfe tushe, wavy gefuna, ladles, rashin dace size, embossing, rashin daidaito kauri na tutiya Layer, abin nadi bugu, da dai sauransu.
Babban dalilai na tutiya Layer fadowa a kashe su ne: surface hadawan abu da iskar shaka, silicon mahadi, ma datti sanyi mirgina emulsion, ma high hadawan abu da iskar shaka yanayi a cikin NOF sashe da dew batu na m gas rabo, m iska-man rabo, low hydrogen kwarara, oxygen infiltration a cikin tanderu, ƙananan zafin jiki na tsiri karfe shiga cikin tukunyar, low matsa lamba a cikin RWP sashe da kuma iska tsotsa a cikin tanderu ƙofa, low zafin jiki zafin jiki a cikin NOF sashen, m evaporation mai, low aluminum abun ciki a cikin tutiya tukunya, ma sauri naúrar gudun, kasa ragewa, gajeriyar lokacin zama a cikin ruwan tutiya Rufin ya yi kauri sosai.