Izikhanyisi ze-Optical, ezaziwa ngokubaizikhanyisi zamehlo(OBAs), ziikhompawundi ezisetyenziselwa ukomeleza inkangeleko yemathiriyeli ngokwandisa ubumhlophe kunye nokuqaqamba. Ngokuqhelekileyo zisetyenziswa kwimizi-mveliso eyahlukeneyo, kubandakanywa amalaphu, amaphepha, izicoci kunye neeplastiki. Kweli nqaku, siza kuphonononga ukuba zeziphi izikhanyisi zamehlo, zisebenza njani, kunye neenkqubo zazo ezahlukeneyo.

Izikhanyisi zamehlo zisebenza ngokufunxa ukukhanya kwe-ultraviolet (UV) nokukukhupha kwakhona njengokukhanya okubonakalayo kwi-blue-violet spectrum. Le nto ibizwa ngokuba yi-fluorescence. Ngokuguqula imitha ye-UV ibe kukukhanya okubonakalayo, izikhanyisi zamehlo ziphucula ukubonakaliswa kunye neempawu ze-fluorescent zezixhobo, zizenza zibonakale ziqaqambile kwaye zimhlophe.

Ukusetyenziswa okuqhelekileyo kwezikhanyisi ze-optical kumashishini e-textile. Kwiimpahla ezilukiweyo, i-optical brighteners yongezwa kwiilaphu kunye nemicu ukuze kuphuculwe imbonakalo yazo. Xa iimpahla okanye amalaphu aphathwa ngezikhanyisi ezibonakalayo evezwa kukukhanya kwelanga okanye ekukhanyeni okungeyonyani, afunxa imitha ye-UV ekhoyo kwaye akhuphe ukukhanya okubonakalayo, okwenza i-textile ibonakale imhlophe kwaye iqaqambile. Esi siphumo sinqweneleka ngokukodwa kwiingubo ezimhlophe okanye ezikhanyayo, eziphucula ukucoceka kwazo kunye nokutsha.

Olunye ushishino olusebenzisa kakhulu izikhanyisi zamehlo lishishini lephepha. Izikhanyisi ze-Optical zongezwa ngexesha lenkqubo yokuvelisa iphepha ukwandisa ukukhanya kwayo kwaye ibonakale imhlophe. Ngokwandisa ubumhlophe bephepha,izikhanyisi zamehlonceda ukuvelisa ushicilelo oluphezulu kunye nemifanekiso. Zikwanceda ekunciphiseni ubungakanani be-inki efunekayo xa kushicilelwa, nto leyo ebangela ukongiwa kweendleko kwiinkampani zokushicilela nabathengi.

Izikhanyisi zamehlo nazo ziqhele ukufunyanwa kwizicoci zokuhlamba impahla. Zongezwa kwiifomyula zokucoca ukwenza ezimhlophe zibonakale zimhlophe kwaye nemibala edlamkileyo. Xa iimpahla zihlanjwa ngee-detergents ezine-optical brighteners, ezi zikhompawundi zifakwa kumphezulu welaphu, zifunxa imitha ye-ultraviolet kwaye zikhuphe ukukhanya okuluhlaza okwesibhakabhaka, zigqume umbala otyheli kunye nokuphucula ukuqaqamba kwempahla. Oku kugcina iimpahla zikhangeleka zicocekile kwaye zintsha, nasemva kokuhlanjwa izihlandlo ezininzi.

Ukwengeza,izikhanyisi zamehlozikwasetyenziswa ekwenzeni iplastiki. Zongezwa kwiplastiki ngexesha lenkqubo yokuvelisa ukuphucula ukubonakala kwayo kwaye ibonakale ikhangeleke ngakumbi. Iimveliso zeplastiki ezifana neebhotile, izikhongozeli kunye nezinto zokupakisha eziphathwa ngokukhanya okukhanyayo zibonakala ziqaqambile kwaye zinomtsalane ngakumbi kwiishelufu zevenkile. Ukusebenzisa i-optical brighteners kwiiplastiki kunokunceda ukufihla nakuphi na ukungafezeki okanye ukutyheli okunokuthi kubonakale ngokuhamba kwexesha ngenxa yokukhanya kwelanga okanye izinto zokusingqongileyo.

Isishwankathelo, i-optical brighteners zikhompawundi ezisetyenziswa ngokubanzi kumashishini ahlukeneyo ukuphucula ubumhlophe kunye nokukhanya kwezinto. Ngokuthabatha ukukhanya kwe-ultraviolet kunye nokuphinda kukhanye njengokukhanya okubonakalayo, izikhanyisi ze-optical zinceda ukuphucula ukubonakala okubonakalayo kweendwangu, iphepha, i-detergents kunye neeplastiki. Zibalulekile ukufezekisa ubuhle kunye neempawu zokuqonda ezifunekayo kwezi zixhobo. Ingaba ukwenza amalaphu abukeke acocekile, ukuprintwa kwephepha kubonakala kubukhali, okanye iiplastiki zibukeka zinomtsalane, izikhanyisi zamehlo zidlala indima ebalulekileyo ekwandiseni amava okubonwa ngokubanzi.