Usoro nkedo ego (ihe nkedo efu).
Usoro nkedo itinye ego bụ ụzọ akụ na ụba iji mepụta akụkụ ọla nwere ezigbo akụkụ nke ọma na imecha elu, na-ebelata ma ọ bụ na-ewepụ ọrụ ndị ọzọ.Ọ bụ otu n'ime usoro nchọta kacha ochie ama ama.Ihe akaebe gbasara ihe ochie na mpaghara dị iche iche nke ụwa na-egosi na usoro ntinye ego malitere n'oge Bronze Age, ihe dịka afọ 4,000 BC.Ọ bụ usoro mmepụta ihe nwere sistemu njikwa a nụchara anụcha na nke siri ike maka usoro nrụpụta asatọ nke ọ bụla.
Nzọụkwụ mbụ a bụ n'ichepụta usoro a ga-ekpofu ọkụ site na ịgbanye wax ka ọ bụrụ ebu (metal die.)
Usoro wax kaks na-enwekarị otu ọdịdị geometric nke bụ isi ka akụkụ nke nkedo emechara.Usoro injection wax na-emepụta ụfọdụ burrs na ụkpụrụ na ọ dị mkpa iji nlezianya wepụ ha.Ọbụna obere ihe fọrọ nke nta ka ọ bụrụ ihe a na-apụghị ịghọta aghọta nke na-abụghị akụkụ ikpeazụ na-ewepụ na usoro a.
Mgbe emechara ya, a na-agbakọta usoro waks ahụ, site na usoro ikpo ọkụ, na-agbakọta na onye na-agba ọsọ (nke a na-agbanyekwa wax) iji mepụta osisi nkedo.
A na-etinye akwa akwa nke ihe mkpuchi seramiiki pụrụ iche slurry n'osisi ahụ na-achịkwa oke okpomọkụ na iru mmiri.
Ozugbo akwa seramiiki dị njikere ma kpọọ nkụ, a na-etinye osisi ahụ dum n'ime usoro autoclave iji wepụ ọtụtụ n'ime waks site na nrụgide uzuoku ka ọ nọrọ naanị ihe ọkpụkpụ seramiiki.Oghere niile jupụtara na waks, ugbu a tọgbọrọ chakoo
Iji nweta ike igwe dị elu yana nguzogide ujo, a na-etinye shei ahụ na-akpụ osisi ndị na-adịghị efu n'ime ọkụ n'ime ọkụ dị elu nke ihe dịka 1,100 C. (2,000 F).
Mgbe calcination usoro, na seramiiki shei ebu na-ọma jupụtara mmiri mmiri metal, nke ike ndọda aga n'ime niile esịtidem ebu, akpụ na ike ike workpieces, niile mmasị sprue.
The ike ike workpieces na-ahụ ebipụ si tress, na-enweta kpọmkwem finishing (egweri, straightening, okpomọkụ ọgwụgwọ, machining, osise, wdg), na, mgbe ahụ, na-aga a siri ike ikpeazụ àgwà nnyocha tupu nkwakọ na mbupu na costumer.
