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

Obeye aziwe njengoukukhanya okukhanyayo, ama-optical brighteners ayinhlanganisela emunca ukukhanya kwe-ultraviolet futhi akhiphe ukukhanya okuluhlaza okwesibhakabhaka, okusiza ukufihla ukuphuzi noma ukuguquguquka kombala kumapulasitiki. Lawa ma-ejenti amhlophe asebenza ngokuguqula imisebe ye-UV engabonakali ibe ukukhanya okuluhlaza okwesibhakabhaka okubonakalayo, okwenza upulasitiki ubonakale umhlophe futhi ugqamile emehlweni omuntu.

Esinye sezikhanyisi ze-optical ezisetshenziswa kakhulu kumapulasitiki yinhlanganisela yezinto eziphilayo ebizwa ngokuthi i-triazine-stilbene derivative. Le nhlanganisela iphumelela kakhulu ekumunceni imisebe ye-UV futhi ikhiphe ukukhanya okuluhlaza okwesibhakabhaka, iyenze ibe ilungele ukuthuthukisa ukubukeka kwamapulasitiki.

Ipulasitikiukukhanya okukhanyayoziza ngezinhlobo eziningi, okuhlanganisa izimpushana, uketshezi kanye nama-masterbatches, okuyizinhlayiya ezigxilile ezihlakazwe kunhlaka ethwalayo. Lawa mafomu ahlukene angafakwa kalula enqubweni yokukhiqiza ipulasitiki, ukuqinisekisa ukuthi i-brightener isatshalaliswa ngokulinganayo kuwo wonke umkhiqizo ophelile.

Ngokungeziwe ekuthuthukiseni ukubukeka okubonakalayo kwamapulasitiki, izinto ezikhanyayo ezikhanyayo zinikeza ezinye izinzuzo, njengokuhlinzeka ngokuvikelwa kwe-UV kanye nokuthuthukisa ukusebenza kukonke kwento. Ngokumunca imisebe ye-UV eyingozi, izinto ezimhlophe zisiza ukunweba ukuphila kwamapulasitiki ngokuvimbela ukuwohloka nokubaphuzi okubangelwa ukuchayeka kwe-UV.

Ngaphezu kwalokho,ukukhanya okukhanyayoingahlanganiswa nezinye izithasiselo, ezifana ne-UV stabilizers nama-antioxidants, ukudala imikhiqizo yepulasitiki ephikisana kakhulu nezici zemvelo futhi igcine ukubukeka kwayo ngokuhamba kwesikhathi.

Uma zisetshenziswe kahle, izikhanyisi zepulasitiki ezikhanyayo zingathuthukisa kakhulu ikhwalithi kanye nenani lemikhiqizo yepulasitiki ezimbonini eziningi ezihlanganisa ukupakisha, izimpahla zabathengi, izimoto nezokwakha. Ngokuhlanganisa lezi zithasiselo ekwenziweni kwazo kwepulasitiki, abakhiqizi bangaqinisekisa ukuthi imikhiqizo yabo igcina ukukhanga okubonakalayo nokuqina ngisho nangemva kokuchayeka isikhathi eside ekukhanyeni nasezimeni zemvelo.

Kubalulekile ukuqaphela, nokho, ukuthi ukukhetha kanye lokuhlushwaukukhanya okukhanyayokufanele ilinganiswe ngokucophelela ukuze kuzuzwe umphumela oyifunayo ngaphandle kokuthikameze kabi ukusebenza noma izici zepulasitiki. Ukusetshenziswa ngokweqile kombala omhlophe kungaholela ekubukekeni okuluhlaza okwesibhakabhaka kakhulu noma okungezona ezemvelo, kuyilapho ukusetshenziswa kancane kungase kungasebenzi kahle ekufihleni ukuguga.

Kafushane, ukukhanya okukhanyayo kudlala indima ebalulekile ekuthuthukiseni ukubukeka nokusebenza kwamapulasitiki. Njengoba isidingo sekhwalithi ephezulu, imikhiqizo yepulasitiki ebukekayo iqhubeka nokukhula, ukusetshenziswa kweukukhanya okukhanyayokulindeleke ukuthi kwande, kuqhubekisele phambili ukuqanjwa kabusha kanye nenqubekela phambili emkhakheni wezithasiselo zepulasitiki. Ngokusebenzisa izinzuzo zalezi zinhlanganisela, abakhiqizi bangakha amapulasitiki angabonakali nje kangcono, kodwa futhi ahlala isikhathi eside futhi ahlala isikhathi eside.