Yuav luam tawm cov ntawv nyeem lossis qauv ntawm OPP hnab , ua ntej, muab qhov xav tau luam tawm cov hnab khoom tiav rau cov hluav taws xob ua haujlwm, vim hais tias qhov hluav taws xob ntawm lub hnab luam tawm ntawm zaj duab xis yuav tsis ploj ntog rau cov ntawv nyeem los yog tooj liab muab tso rau hauv cov ntawv (hu ua prepress pwm), muab tso rau lossis muab tso rau hauv qhov chaw luam ntawv tso tawm, tus cwj pwm hloov mus rau hauv lub hnab yas, ua kom tiav hnab yas hnab.
Thaum luam ntawv yuav tsum faj seeb rau qhov sib txawv ntawm lub pwm thiab lub hnab, qhov sib txawv loj heev yuav ua rau tus cwj mem muaj ntau heev thiab ntau dhau, thiab qhov sib txawv me me yuav ua rau muaj tsawg tus cwj mem, dhau ntiav.
OPP hnab nyob rau hauv kev siv cov txheej txheem yuav tsum xyuam xim rau cov qauv ntawm lub ntim, tus qauv thiab cov ntawv yuav tsum raug teem caij, kom cov yam ntxwv ntawm cov khoom yuav yog qhov zoo, ntawm txoj kev luam tawm raws li cov kev cai hauv lub tebchaws , tsis txhob txiav qhov chaw ntawm.
