Kev siv cov ntaub so ntswg uas siv rau txhua txhua lub neej yog cov paj rwb uas tau raug tshem tawm cov roj, uas tshem tawm cov thawv tawm ntawm cov paj rwb, degreased, bleached, ntxuav, qhuav, thiab tiav lawm. Nws yog ib qho yooj yim kom nqus tau kua dua li cov paj rwb zoo tib yam, thiab yog ib qho khoom ua tsis huv. Yuav siv tshuaj nitrocellulose. Kev siv cov khoom siv ua kom zoo tshaj plaws, cov dej khov thiab cov kua nplaum, cov xim dawb thiab ywj siab, yooj yim rau cov khoom siv tsis yooj yim, tsis muaj teebmeem kua qaub thiab alkali, thiab qhov ua tau zoo raws li cov qauv kev teeb tsa los ntawm Ministry of Health, yog li ntawd nws tau txais cov tsev kho mob loj thiab chaw kho mob loj. Dav siv, vim tias txheej txheej tsis muaj roj, nws muaj hydrophilicity zoo, soaked nyob rau hauv 75% cawv yuav siv tau ua ib lub paj hlwb uas tsis huv.
Rau ib lub sij hawm ntev, lub tuam txhab tau lees paub thiab qhuas los ntawm cov neeg muas zaub nrog zoo lub koob npe nrov, zoo thiab luv nqi. Rau cov kev pab zoo, peb muaj lub koob npe nrov, tsis tshua muaj nqi thiab zoo heev. Peb muab peb cov qhua tuaj noj mov raws sijhawm thiab zoo. Qhov kev pabcuam no yog rau lub hom phiaj, kom paub meej tias koj tuaj yeem muab cov ntaub ntawv kho mob zoo thiab cov ntaub ntawv tu mob, koj txais tos.
