Lambun da aka kunna shine adsorbent da aka yi daga yumbu (yafi bentonite) azaman ɗanyen abu, ana bi da shi da inorganic acidification, gishiri ko wasu hanyoyin, sannan a wanke a bushe da ruwa.Yana da bayyanar farin foda mai madara, ba shi da wari, mara wari, mara guba, kuma yana da aikin talla.Yana iya adsorb abubuwa masu launi da kwayoyin halitta.Yana da sauƙi don shayar da danshi a cikin iska, kuma sanya shi na dogon lokaci zai rage aikin talla.Lokacin amfani, yana da kyau a yi zafi (zai fi dacewa a 80-100 digiri Celsius) don farfado.Duk da haka, dumama sama da digiri 300 na ma'aunin celcius ya fara rasa ruwan kristal, yana haifar da canje-canjen tsarin da kuma tasiri tasirin fadewa.Lambun da aka kunna ba zai iya narkewa a cikin ruwa, abubuwan kaushi na halitta, da mai daban-daban, kusan gaba ɗaya mai narkewa a cikin soda mai zafi da acid hydrochloric, tare da ƙarancin dangi na 2.3-2.5, da ƙaramin kumburi a cikin ruwa da mai.

Farin yumbu da ke faruwa a dabi'a tare da kayan aikin bleaching fari ne, fari fari yumbu wanda ya ƙunshi montmorillonite, albite, da quartz, kuma nau'in bentonite ne.

Yafi samfurin da bazuwar gilashin dutsen volcanic, wanda ba ya faɗaɗa bayan sha ruwa, kuma ƙimar pH na dakatarwa ya bambanta da na alkaline bentonite;Ayyukan bleaching ya fi na yumbu da aka kunna.Launukan gabaɗaya sun haɗa da rawaya mai haske, koren fari, launin toka, kalar zaitun, launin ruwan kasa, farar madara, jajayen peach, shuɗi, da sauransu. Akwai fari kaɗan kaɗan.Yawaita 2.7-2.9g/cm.Yawan da ake gani sau da yawa yana ƙasa da ƙasa saboda porosity.A sinadaran abun da ke ciki ne kama da na talakawa yumbu, tare da babban sinadaran aka gyara kasancewa aluminum oxide, silicon dioxide, ruwa, da kuma wani karamin adadin baƙin ƙarfe, magnesium, calcium, da dai sauransu. Babu plasticity, tare da high adsorption iya aiki.Saboda yawan abun ciki na hydrous silicic acid, yana da acidic zuwa litmus.Ruwa yana da saurin fashewa kuma yana da babban abun ciki na ruwa.Gabaɗaya, mafi kyawun fineness, mafi girman ikon decolorization.

Lokacin gudanar da kimanta ingancin lokacin binciken, ya zama dole a auna aikin bleaching, acidity, aikin tacewa, sha mai, da sauran abubuwa.