Ihe nkwakọ ngwaahịa a na-eri eri na-achọkarị ịmịnye mmanya mmanya na-eri nri chọrọ nnukwu ihe mgbochi iji gbochie ọkụ UV, ikuku oxygen na miosture. ma akwa notch na-atụ aro ka ị gbakwunye na nkwakọ ngwaahịa.Matte elu na kenkowaputa elu niile dị.