Cov pa roj carbon dub dawb, tseem hu ua silica, pom muaj kev siv dav hauv ntau yam lag luam vim nws cov yam ntxwv tshwj xeeb. Hauv cov khoom siv roj hmab, nws ua haujlwm ua tus neeg sawv cev txhawb nqa, txhim kho lub zog thiab kev ruaj khov. Hauv cov yas, nws txhim kho qhov ruaj khov thermal thiab UV tsis kam ntawm cov ntaub ntawv. Tsis tas li ntawd, cov pa roj carbon dub dawb yog siv rau hauv cov txheej thiab cov nplaum kom muab kev sib kis zoo dua thiab kev nplaum. Nws lub peev xwm los ua tus neeg sawv cev thickening ua rau nws muaj txiaj ntsig zoo hauv cov xim thiab cov kua mem. Ntxiv mus, nws ua lub luag haujlwm tseem ceeb hauv kev lag luam khoom noj khoom haus ua tus neeg sawv cev tiv thaiv kev sib sau ua ke. Nws qhov kev hloov pauv tau yooj yim thiab ntau yam kev siv ua rau cov pa roj carbon dub dawb yog cov khoom siv tseem ceeb hauv kev lag luam niaj hnub no.