Kaolin ni amabuye y'agaciro atari ay'icyuma, ubwoko bw'ibumba n'ibumba ryiganjemo amabuye y'agaciro ya kaolinite. Kubera ko ari umweru kandi yoroshye, yitwa kandi ubutaka bw'ibicu byera. Yitiriwe Umudugudu wa Gaoling, Umujyi wa Jingde, Intara ya Jiangxi.

Kaolini yayo nziza ni umweru, yoroshye kandi isa n'ibumba ryoroshye, kandi ifite imiterere myiza y'umubiri n'imiti nko kuba plasticity no kwirinda umuriro. Ibigizemo imyunyu ngugu igizwe ahanini na kaolinite, halloysite, hydromica, illite, montmorillonite, quartz, feldspar n'indi myunyu ngugu. Kaolini ifite uburyo bwinshi bwo kuyikoresha, ikoreshwa cyane cyane mu gukora impapuro, ibumba n'ibikoresho birwanya ubushyuhe, ikurikirwa n'imyambaro, ifu y'urusenda, irangi rya enamel n'ibikoresho fatizo bya sima yera, hamwe n'ingano nto ikoreshwa muri pulasitiki, amarangi, amarangi, amapine, amapine yo gusya, amakaramu, amavuta yo kwisiga ya buri munsi, isabune, imiti yica udukoko, imyenda, peteroli, imiti, ibikoresho by'ubwubatsi, ubwubatsi bw'igihugu n'izindi nganda.
Umucyo w'umweru upfunyitse
Ubuziranenge ni kimwe mu bipimo by'ingenzi by'imikorere ya kaolin mu ikoranabuhanga, kandi kaolin ifite ubuziranenge bwinshi ni umweru. Ubuziranenge bwa kaolin bugabanyijemo umweru karemano n'ubuziranenge nyuma yo gukaraba. Ku bikoresho fatizo bya ceramic, ubuziranenge nyuma yo gukaraba ni ingenzi cyane, kandi uko ubuziranenge bwa kalcination burushaho kuba bwiza, niko bwiza burushaho kuba bwiza. Ikoranabuhanga rya ceramic rigena ko kumisha kuri 105°C ari cyo gipimo cy'ubuziranenge karemano, naho gukaraba kuri 1300°C ni cyo gipimo cy'ubuziranenge bwa kalcination. Ubuziranenge bushobora gupimwa hakoreshejwe icyuma gipima ubuziranenge. Igipimo cy'ubuziranenge ni igikoresho gipima urumuri rufite uburebure bwa 3800-7000Å (urugero: Angstrom, 1 Angstrom = 0.1 nm). Muri icyuma gipima ubuziranenge, gereranya ubuziranenge bw'icyitegererezo kigomba kugeragezwa n'icyitegererezo gisanzwe (nka BaSO4, MgO, nibindi), ni ukuvuga agaciro k'ubuziranenge (urugero, ubuziranenge 90 busobanura 90% by'ubuziranenge bw'icyitegererezo gisanzwe).

Umucyo ni imiterere y'imikorere isa n'umweru, bingana n'umweru munsi y'imirasire y'urumuri rwa 4570Å (Angstrom).

Ibara rya kaolini rifitanye isano ahanini na okiside z'icyuma cyangwa ibintu by'umwimerere birimo. Muri rusange, irimo Fe2O3, ifite umutuku w'iroza n'umuhondo wijimye; irimo Fe2+, ifite ubururu bwerurutse n'icyatsi kibisi; irimo MnO2, ifite umukara wijimye; irimo ibintu by'umwimerere, bifite umuhondo wijimye, imvi, ubururu n'umukara. Kuba hari iyi myanda bigabanya umweru karemano wa kaolini, kandi imyunyu ngugu ya feri na titaniyumu nabyo bigira ingaruka ku kwera kwa calcium, bigatera ibizinga cyangwa inkovu muri porcelain.