Cov hnab ntawv yog cov khoom tsim los ntawm cov ntawv lossis cov ntawv-cov ntaub ntawv, ua haujlwm rau ntau yam xws li khw muag khoom, ntim khoom, thiab kev lag luam. Lawv yog tsim los ntawm cov ntaub ntawv xws li dawb cardstock, coated ntawv, thiab kraft ntawv; Cov qauv kev hloov pauv muaj xws li qhib- lub qhov ncauj sewn- hauv qab hnab thiab lub valve- hom sewn hnab, thaum kov tsim muaj ntau yam los ntawm xuas nrig ntaus- qhov styles nrog threaded cords rau txuas nrog tsis muaj qhov. Vim lawv cov biodegradability thiab recyclability, hnab ntawv feem ntau raug saib raws li eco- lwm txoj kev phooj ywg, thiab tsoom fwv cov cai thoob ntiaj teb tau txhawb nqa lawv cov khoom siv los hloov cov khoom yas.
Txawm li cas los xij, cov ntaub ntawv pov thawj ib puag ncig ntawm cov hnab ntawv yog ib qho kev sib cav: cov hnab ua los ntawm cov ntaub so ntswg siv hav zoov, thaum tsim cov hnab ntawv rov siv dua muaj kev siv hluav taws xob ntau thiab muaj kuab paug, uas ua rau muaj kev cuam tshuam tag nrho lub neej ib puag ncig uas ntau dua li cov hnab yas. Kev txhawj xeeb txog kev nyab xeeb ntawm cov khoom siv-tshwj xeeb hauv kev ntim khoom noj- tau ua rau muaj kev nplua rau qee lub tuam txhab uas siv cov khoom siv tsis yog- cov txheej txheem ntim khoom lossis kev tshuaj xyuas tsis zoo, ua rau cov neeg tswj xyuas kom nruj cov qauv tsim khoom thiab cov txheej txheem soj ntsuam random. Raws li kev tsim cov txheej txheem txhim kho, kev siv cov nroj tsuag - cov hnab ntawv fiber ntau tau nthuav dav, nrog cov ntawv dawb kraft tawm los ua ib qho tseem ceeb hauv eco- cov khoom siv zoo rau cov hnab nqa khoom, feem ntau vim nws tsis xav tau cov yas lamination.