Tsarkaci tsari:

① Buɗewa ya manta (kyauta ta manta)

Ciki har da nau'ikan uku: rigar yashi mold, busasasshen yashi mold, da ilmin yashi mai launin fata;

② rufe yanayin da ya manta

Gyara na musamman ta amfani da yashi na ma'adinai na halitta kamar yadda babban kayan haɗi (kamar simintin gida, casting casting, casting matsin lamba, da sauransu);

③ Sauran hanyoyin da aka mantawa

Dangane da zafin jiki na nakasa, manta za'a iya raba shi cikin tsananin mashin karfe na billet), m m (a kasa mai manta da sanyi (a dakin zazzabi).