Lub khob tsis muaj cov tshuaj organic thaum lub sijhawm tua hluav taws.Thaum tib neeg haus dej lossis lwm yam dej qab zib hauv lub khob, lawv tsis tas yuav txhawj xeeb txog cov tshuaj nyob hauv plab.Cov iav saum npoo yog du thiab yooj yim los ntxuav.Cov pa phem tsis yog yooj yim kom loj hlob ntawm phab ntsa ntawm lub khob, yog li haus dej los ntawm lub khob yog qhov zoo tshaj plaws thiab nyab xeeb tshaj plaws.
Tsis tas li ntawd, cov kws tshaj lij kuj tawm tswv yim rau kev siv cov khob yas yas, vim tias cov khob enamel tau tsim tom qab kub kub enamelization ntau txhiab degrees, thiab tsis muaj cov khoom tsis zoo xws li txhuas, uas tuaj yeem siv nrog kev ntseeg siab.
Cov yeeb yuj ceramic khob yog qhov txaus siab heev, tab sis qhov tseeb, muaj qhov tsis txaus ntseeg loj heev hauv cov xim xim, tshwj xeeb tshaj yog cov phab ntsa sab hauv yog coated nrog glaze.Thaum lub khob ntim nrog dej kub los yog dej qab zib nrog acidity thiab alkalinity siab, cov xim no muaj tshuaj lom. Cov hlau hnyav xws li txhuas hauv nws yooj yim rau yaj hauv cov kua, thiab cov neeg haus cov kua dej nrog cov tshuaj lom neeg yuav ua rau tib neeg lub cev raug mob.Plastics feem ntau ntxiv rau cov yas, uas muaj qee yam tshuaj lom neeg.Thaum dej kub lossis dej kub kub yog siv rau hauv cov khob yas, cov tshuaj lom neeg tau yooj yim diluted rau hauv dej, thiab cov microstructure sab hauv ntawm cov yas muaj ntau qhov pores.Cov kab mob yog muab zais rau hauv, thiab nws yooj yim rau yug cov kab mob yog tias nws tsis huv.Yog li ntawd, cov kws tshaj lij ceeb toom tias thaum xaiv lub khob yas, koj yuav tsum xaiv lub khob dej ua los ntawm cov khoom noj-qib yas uas ua tau raws li lub teb chaws tus qauv.