Pulp kev lag luam thiab Ntawv yog muab faib ua ob ntu: pulping thiab ntawv ua. Cov txheej txheem pulping yog txheej txheem uas muaj cov khoom siv fiber ntau xws li cov khoom siv rau kev npaj, ua noj, ntxuav, bleaching, thiab cov zoo li los tsim cov pulp uas siv tau rau papermaking. Hauv cov txheej txheem papermaking, slurry xa los ntawm lub tuam tsev pulping yog raug rau cov txheej txheem ntawm kev sib xyaw, ntws, nias, ziab, coiling, thiab lwm yam los tsim cov ntawv tiav. Tsis tas li ntawd, chav tsev rov qab alkali rov qab cov kua alkali hauv cov cawv dub tawm tom qab lub pulping rau rov siv dua. Lub tuam tsev kho dej khib nyiab kho cov dej khib nyiab tom qab ua ntawv kom ua tau raws li cov qauv tsim tawm hauv lub tebchaws. Cov txheej txheem ntau yam ntawm cov ntawv sau saum toj no yog qhov tseem ceeb rau kev tswj hwm lub valve.