Ipulasitiki isetshenziswa kabanzi ezimbonini ezahlukene ngenxa yokuguquguquka kwayo kanye nezindleko eziphansi. Kodwa-ke, inkinga evamile ngamapulasitiki ukuthi avame ukuba phuzi noma ashintshe umbala ngokuhamba kwesikhathi ngenxa yokuchayeka ekukhanyeni nasekushiseni. Ukuze kuxazululwe le nkinga, abakhiqizi bavame ukufaka izithasiselo ezibizwa ngokuthi ama-optical brighteners emikhiqizweni yepulasitiki ukuze bathuthukise ukubukeka kwawo.

Obeye aziwe njengoizibani zokukhanya, izibani zokukhanya ziyizinto ezimunca ukukhanya kwe-ultraviolet futhi zikhiphe ukukhanya okuluhlaza okwesibhakabhaka, ezisiza ekufihleni ukuphuzi noma ukushintsha kombala kumapulasitiki. Lezi zinto zokwenza mhlophe zisebenza ngokuguqula imisebe ye-UV engabonakali ibe ukukhanya okuluhlaza okwesibhakabhaka okubonakalayo, okwenza ipulasitiki ibonakale imhlophe futhi ikhanya kakhulu emehlweni omuntu.

Esinye sezibani zokukhanyisa ezisetshenziswa kakhulu kumapulasitiki yinhlanganisela yezinto eziphilayo ebizwa ngokuthi i-triazine-stilbene derivative. Le nhlanganisela iphumelela kakhulu ekumunceni imisebe ye-UV nokukhipha ukukhanya okuluhlaza okwesibhakabhaka, okwenza kube kuhle kakhulu ekuthuthukiseni ukubukeka kwamapulasitiki.

Ipulasitikiizibani zokukhanyaziza ngezindlela eziningi, kufaka phakathi ama-powder, uketshezi kanye nama-masterbatches, okuyizinhlayiya ezihlanganisiwe ezisakazeke ku-resin yokuthwala. Lezi zinhlobo ezahlukene zingafakwa kalula enkambisweni yokukhiqiza ipulasitiki, okuqinisekisa ukuthi i-brightener isatshalaliswa ngokulinganayo kuwo wonke umkhiqizo oqediwe.

Ngaphezu kokuthuthukisa ukubukeka okubonakalayo kwepulasitiki, izibani zokukhanya zinikeza ezinye izinzuzo, njengokunikeza ukuvikelwa kwe-UV nokuthuthukisa ukusebenza kahle kwezinto. Ngokumunca imisebe ye-UV eyingozi, izibani zokukhanya zisiza ekwandiseni impilo yepulasitiki ngokuvimbela ukuwohloka kanye nokuphuzi okubangelwa ukuvezwa yi-UV.

Ngaphezu kwalokho,izibani zokukhanyaingahlanganiswa nezinye izithasiselo, njengeziqinisi ze-UV kanye nama-antioxidants, ukudala imikhiqizo yepulasitiki ekwazi ukumelana kakhulu nezici zemvelo futhi igcine ukubukeka kwayo ngokuhamba kwesikhathi.

Uma zisetshenziswa kahle, izibani zokukhanyisa zepulasitiki zingathuthukisa kakhulu ikhwalithi kanye nenani lemikhiqizo yepulasitiki ezimbonini eziningi okuhlanganisa ukupakisha, izimpahla zabathengi, izimoto kanye nokwakha. Ngokufaka lezi zithasiselo ekwakhiweni kwazo kwepulasitiki, abakhiqizi bangaqinisekisa ukuthi imikhiqizo yabo igcina ukubukeka kwayo nokuqina ngisho nangemva kokuchayeka isikhathi eside ekukhanyeni nasezimweni zemvelo.

Nokho, kubalulekile ukuqaphela ukuthi ukukhetha kanye nokugxilisa ingqondoizibani zokukhanyakumele ilinganiswe ngokucophelela ukuze kufezwe umphumela ofiselekayo ngaphandle kokuthinta kabi ukusebenza noma izici zepulasitiki. Ukusetshenziswa ngokweqile kwe-whitener kungabangela ukubukeka okuluhlaza okwesibhakabhaka kakhulu noma okungavamile, kuyilapho ukusetshenziswa ngokweqile kungase kungasebenzi kahle ekufihleni ukushintsha kombala.

Ngamafuphi, izibani zokukhanyisa ezibonakalayo zidlala indima ebalulekile ekuthuthukiseni ukubukeka nokusebenza kwepulasitiki. Njengoba isidingo semikhiqizo yepulasitiki esezingeni eliphezulu nekhangayo siqhubeka nokukhula, ukusetshenziswa kweizibani zokukhanyakulindeleke ukuthi kwande, kuqhubekisele phambili ukusungula izinto ezintsha kanye nentuthuko emkhakheni wezithasiselo zepulasitiki. Ngokusebenzisa izinzuzo zalezi zinhlanganisela, abakhiqizi bangakha amapulasitiki angagcini nje ngokubukeka kangcono, kodwa futhi ahlala isikhathi eside futhi aqine kakhudlwana.