Uru nke akpa nkwụnye
1. Akpa nkwakọ ngwaahịa na-eguzo onwe ya nwere arụmọrụ mkpuchi dị mma, ike ihe mejupụtara ihe dị mma, ọ dịghị mfe ịgbaji ma ọ bụ na-agbapụta, dị arọ, na-eri obere ihe, ma dị mfe ibufe. N'otu oge ahụ, ihe nkwakọ ngwaahịa ahụ nwere arụmọrụ dị elu dị ka mgbochi static, mgbochi ultraviolet, igbochi oxygen, ihe na-egosi mmiri, na mkpuchi dị mfe.
2. Enwere ike itinye akpa nkwụnye nkwụnye ahụ na-eguzo na shelf, nke na-eme ka ọdịdị ahụ dịkwuo mma, dị ọnụ ala ma nwee ọnụ ala.
3. Carbon dị ala, enyi na enyi na gburugburu ebe obibi, na nke a na-emegharị: Nkwakọ ngwaahịa na-agbanwe agbanwe dị ka akpa ndị na-eguzo ọtọ na-eji ihe polymer ọhụrụ eme ihe dị ka ihe ọkụkụ, n'ihi ya, ha nwere nnukwu nsonaazụ na nchebe gburugburu ebe obibi na enwere ike ịmegharị ya ma jiri ya mee ihe.
4. Dị mma na ngwa ngwa, na-ebi obere mpaghara: Akpa akpa mkpuchi mkpuchi nke onwe ya nwere mbipụta mara mma, akpa akpa na-egbuke egbuke, obere na ọdịdị mara mma, nwere ike ịpịaji ma gbasaa, ọ dịghị etinye ebe ọ bụla, ọ dịkwa mfe iburu.
5. Akpa nchekwa na ntụkwasị obi nwere ike hụ na nchekwa nke ngwaahịa anyị n'oge njem ma belata ihe egwu njem.