Ma lalo o nā kūlana kūikawā, nā uhi a me nā pena pena e like me ka pena waho, ka pena, ka pena kaʻa, e hoʻonui ai i ke kaʻina hana ʻelemakule, ma hope o ka hōʻike lōʻihi ʻana i ka pāhawewe ultraviolet, ʻelemakule māmā, oxygen oxygen.
ʻO ke ala kūpono e hoʻomaikaʻi ai i ka pae pale kū i ke aniani e hoʻohui i ka antioxidant a me ka light stabilizer, i hiki ke kāohi pono i nā oxidation radicals free i ka resin plastic, decomposition of hydrogen peroxide, and capture free radicals, i mea e hāʻawi ai i ka pale lōʻihi no kēpau kēpau, a lohi loa i ka nalo ʻana o ka gloss, melemele a me ka pulverization o ka uhi ʻana.