1.Ọ na-ejikarị eme ihe na mkpuchi ụgbọ ala, agba ígwè efere efere, nwere ike mkpuchi, enameled waya na mkpuchi ngwa ụlọ.
2.Ọ bụkwa ihe dị mkpa n'etiti ezigbo kemịkalụ, na-eji na nkwadebe nke polyester resin, adhesive, sịntetik eriri, akpụkpọ anụ ihe, wdg.