I-resin yi-hydrocarbon (i-hydrocarbon) exudate esuka kwizityalo, ngakumbi ii-conifers, ezixabiswa kwezinye izakhiwo zeekhemikhali ezikhethekileyo. Iresin inokohlulwa ibe ziindidi ezimbini zeresin yendalo kunye neresin yokwenziwa, kwaye ilensi yeresin yilensi eyenziwe yikhemikhali synthesis kunye nokupolishwa ngeresin njengezinto ezikrwada. I-resin lens ineenzuzo ezicacileyo, ubunzima bayo bukhaphukhaphu, ukunxiba ngokukhululekileyo; Okwesibini, i-lens ye-resin inokumelana nempembelelo enamandla kwaye ayikho buthathaka kwaye ikhuselekile; Ngexesha elifanayo, i-resin lens nayo inokuhanjiswa kokukhanya okulungileyo; Ukongeza, iilensi zeresin kulula ukuphinda zihlaziywe ukuhlangabezana neemfuno ezikhethekileyo. Okokugqibela, kudityaniswa nokwenziwa ngokutsha kunye nokuphuculwa kwenkqubo yokugquma, iilensi zeresin zikwanazo nokunganyangeki kakuhle, ngoko ziye zaba zezona ziphambili kwiilensi kwimarike.