Agba ntekwasa efere na-akpọ mkpuchi efere, agba ígwè efere, ọ dabeere na ígwè eriri igwe (oyi akpọrepu efere, ọkụ galvanized efere, aluminum efere, elu aluminum alloy efere, igwe anaghị agba nchara, wdg) dị ka isi ihe, na mkpuchi elu ma ọ bụ laminating dị iche iche nke mkpuchi organic ma ọ bụ ihe nkiri plastik.N'ihi na ọ na-okokụre ke metallurgical factory n'elu mkpuchi eriri igwe, ndị ọrụ nwere ike hazie ozugbo n'ime ngwaahịa, nke a makwaara dị ka ihe mkpuchi mkpuchi mkpuchi.