Misomali yamasiku ano imakhala yopangidwa ndi chitsulo, nthawi zambiri yoviikidwa kapena yokutidwa kuti isawononge dzimbiri m'mikhalidwe yovuta kapena kuti imamatire.Misomali wamba yamatabwa nthawi zambiri imakhala yachitsulo chofewa, chochepa cha carbon kapena "chofatsa" (pafupifupi 0.1% ya carbon, chitsulo chotsalira komanso mwina silicon kapena manganese).Misomali ya konkire imakhala yolimba, yokhala ndi mpweya wa 0.5-0.75%.