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I-Zujin 999 kunye ne-Zujin 9999 zizinto ezimbini ezahlukeneyo zegolide ezicocekileyo. Umahluko phakathi kwabo usekusulungekeni kwegolide.
1. I-Zujin 999: I-Zujin 999 ibhekisela ekucocekeni kwezinto zegolide ezifikelela kwi-99.9% (eyaziwa nangokuthi iinxalenye ze-999 ngewaka). Oku kubonisa ukuba izinto zegolide ziqulethe ukungcola okumbalwa kwaye phantse zenziwe ngegolide esulungekileyo. Ngenxa yokucoceka kwayo okuphezulu, iZujin 999 ihlala inombala oqaqambileyo wegolide omthubi kwaye ithathwa njengesixhobo segolide esikumgangatho ophezulu.
2. I-Zuojin 9999: I-Zuojin 9999 ibhekisela ekuhlambulukeni kwezinto zegolide ezifikelela kwi-99.99% (eyaziwa nangokuthi iinxalenye ze-9999 ngewaka). Xa kuthelekiswa neZujin 999, iZujin 9999 inobunyulu obuphezulu kwaye iqulethe ukungcola okumbalwa. Ngoko ke, umbala wegolide we-9999 uhlambulukile kwaye uthambile. Ngenxa yokucoceka kwayo okuphezulu, igolide epheleleyo engu-9999 ihlala ithathwa njengesixhobo segolide esikumgangatho ophezulu kwaye ixabiso layo liphezulu.
Enyanisweni, xa kuthengwa iimveliso zegolide, kwanele ukuqinisekisa ukuba i-99% yegolide ngexesha lokusetyenziswa lanele, ebonisa ukuba umxholo wegolide ucoceke kakhulu. Ke, igolide engama-99 ihlala isetyenziswa kakhulu ekwenzeni izacholo, imivalo yegolide, kunye nezinye iimveliso zegolide. Ine-antioxidant ephezulu kunye nokuxhatshazwa kokugqoka, ngoko inokugcina i-luster yexesha elide kunye ne-aesthetics. Nangona i-99 yegolide inobunyulu obuphezulu, ixabiso layo lisezantsi xa lithelekiswa negolide esulungekileyo ephezulu njengegolide epheleleyo 999 kunye ne-9999, njengoko iphezulu ubunyulu, kokukhona iphezulu ukunqaba kunye nexabiso legolide. Ukukhethwa kwegolide engama-99 okanye enye igolide esulungekileyo kuxhomekeke kukhetho lomntu, uhlahlo lwabiwo-mali kunye neemfuno zokuthenga.
Xa uthenga iimveliso zegolide, ukuqonda ukucoceka kunokukunceda ukuba ubone umgangatho kunye nexabiso lento. Nangona kunjalo, kufuneka kuqatshelwe ukuba iimveliso zegolide ezinobunyulu obuphezulu nazo zisulungekile kwaye zibiza kakhulu ekuveliseni nasekuqhubeni, ngoko ke ixabiso linokuba phezulu. Ukhetho lokusulungeka kwegolide olunokusetyenziswa luxhomekeke kukhetho lomntu, uhlahlo lwabiwo-mali kunye nenjongo yokuthenga.