Karfe da ke ɗauke da fiye da kusan 10% Cr an ayyana su azaman kayan bakin karfe.Bakin karfe foda da aka yi daga bakin karfe gami.Siffar da barbashi ne na yau da kullum mai siffar zobe, da yawa ne 7.9g/cm3, da kuma talakawan barbashi size ne <33μm.Yana da kyau juriya da karko, da kuma mai siffar zobe barbashi za a iya matsayi a layi daya da surface na shafi fim da kuma rarraba a ko'ina cikin shafi film, forming wani garkuwa Layer da kyau kwarai sutura ikon toshe danshi.Hakanan za'a iya amfani dashi a cikin injin fashewar yashi don aiwatar da wasu kayan aiki tare da ingantacciyar madaidaici.Bakin karfe foda an yi shi da ƙananan ƙarfe na carbon, wato, bakin karfe mai ɗauke da 18% zuwa 20% na chromium, 10% zuwa 12% na nickel, da kusan 3% na molybdenum.Bayan atomization, ball milling da sieving a gaban lubricant (stearic acid) Graded pigments kuma za a iya kai tsaye rigar ball nika.