Cov hnab ntim zoo li yog qhov txaus nyiam rau lawv tus kheej cov tsos uas nyiam cov menyuam yaus thaum muab ntau qhov chaw los txhawb koj lub hom phiaj. Peb cov hnab ntim khoom tsim tau tuaj yeem kho tau hauv cov duab thiab ntim. Cov hnab ntim khoom ntim tau yooj yim nqa thiab thauj.
Cov hnab preformed no yog tsim nyob rau hauv ib puag ncig tsis muaj plua plav, thiab tsis muaj benzene& ketone-dawb inks yog siv rau kev cai luam ntawv nrog peb cov kws luam ntawv tshuab, xa cov ntaub ntawv luam tawm raug thiab muab koj cov khoom zoo tshaj plaws. Peb ua tiav kev tswj hwm zoo kom ntseeg tau tias txhua lub hnab ntim khoom tiav raws li cov neeg siv khoom tshwj xeeb.