Cork, ubwoko bwa cork, biragoye kumenyera ikirere kiri hejuru nubushyuhe bwo hejuru kandi muri rusange bikurira mumisozi n’amashyamba ku butumburuke bwa metero 400-2000 mu turere dushyuha kandi dushyuha. Umutungo wa Cork urashobora kuboneka mumisozi iri hagati ya dogere 32 na 35 z'uburebure bwamajyaruguru yujuje imiterere yimiterere yikirere. Kurugero, Porutugali, Espagne, Amajyepfo yUbufaransa, imisozi ya Qinba mu gihugu cyanjye, mu majyepfo y’iburengerazuba bwa Henan, na Alijeriya. Porutugali nicyo gihugu cyohereza ibicuruzwa byinshi mu mahanga kandi bizwi ku izina rya “Cork Kingdom” kubera ikirere cyacyo cya Mediterane kidasanzwe, gikwiranye no gukura kw'ibikoresho fatizo bya cork. Muri icyo gihe, Porutugali ni kimwe mu bihugu bya mbere ku isi byateje imbere umutungo wa cork, kohereza ibicuruzwa hanze, n'ibicuruzwa bitunganywa. Umusaruro wa cork wa Alijeriya uri mu myanya ya mbere ku isi. [2] Imisozi ya Qinba mu Ntara ya Shaanxi, mu gihugu cyanjye, nayo irimo umutungo wa cork ukungahaye, urenga 50% by’umutungo wa cork mu gihugu. Kubwibyo, Shaanxi azwi nka "Cork Capital" mu nganda. Dushingiye kuriyi nyungu yibikoresho, uruganda runini rwa cork murugo rwibanze cyane hano. Cork igizwe ningirabuzimafatizo nyinshi zitunganijwe neza. Umuyoboro wa selile ukunze kuba urimo resin na tannin, kandi selile zuzuye umwuka, cork rero ikunze kugira ibara, urumuri rworoshye kandi rworoshye, byoroshye, bidashobora kwangirika, ntabwo byoroshye kwanduzwa nimiti, kandi ni umuyobozi mubi w'amashanyarazi, ubushyuhe nijwi . Igizwe n'ingirabuzimafatizo zapfuye mu buryo bwo mu maso 14, zitunganijwe neza mu buryo bwa mpandeshatu. Ubusanzwe diameter ya selile ni microne 30 naho ubunini bwakagari ni microni 1 kugeza 2. Hariho imiyoboro hagati ya selile. Intera iri hagati ya selile ebyiri zegeranye zigizwe nibice 5, bibiri muri byo ni fibrous, bigakurikirwa nibice bibiri bya cork, hamwe nigiti cyibiti hagati. Hano hari selile zirenga miliyoni 50 muri santimetero kibe.