Cov ntawv carbonless, tseem hu ua NCR daim ntawv (tsis muaj cov pa roj carbon), tau dhau los ua lwm txoj hauv kev rau cov ntawv carbon. Tsis tsuas yog carbonless ntawv ntau tus phooj ywg ib puag ncig, nws kuj yooj yim dua thiab ua haujlwm zoo rau cov lag luam thiab cov tib neeg ib yam nkaus.
Yog li, pes tsawg daim ntawv carbonless hnyav? Qhov hnyav ntawm cov ntawv tsis muaj carbon yuav txawv nyob ntawm seb hom thiab hom twg, tab sis qhov hnyav tshaj plaws yog nyob ib ncig ntawm 20 lbs. Qhov no txhais tau hais tias ib tug ream ntawm 500 nplooj ntawv yuav hnyav kwv yees li 5 phaus. Txawm li cas los xij, tseem muaj cov ntawv tsis muaj cov pa roj carbon monoxide muaj nyob rau hauv qhov sib dua lossis hnyav dua, nyob ntawm seb lawv xav siv.
Tab sis vim li cas cov ntawv tsis muaj carbonless yog ib puag ncig zoo dua li cov ntawv carbon? Cov ntawv carbon yuav tsum tau muab ib txheej ntawm cov pa roj tso rau ntawm ob nplooj ntawv ntawm daim ntawv txhawm rau tsim cov ntawv luam uas xav tau. Cov pa roj carbon txheej no tsim cov khoom pov tseg ntau heev thiab tuaj yeem ua rau muaj kev phom sij rau ib puag ncig yog tias tsis muab pov tseg kom raug. Carbonless ntawv, ntawm qhov tod tes, siv cov tshuaj pleev xim rau sab nraum qab ntawm daim ntawv saum toj kawg nkaus uas cuam tshuam nrog rau pem hauv ntej ntawm daim ntawv hauv qab los tsim cov ntawv luam yam tsis tas yuav tsum muaj cov pa roj carbon. Cov txheej txheem no tsis tsuas yog tshem tawm cov khib nyiab thiab toxicity ntawm cov pa roj carbon monoxide, nws tseem tso cai rau cov ntawv luam kom huv thiab meej dua.
Ntxiv nrog rau kev ua kom zoo ib puag ncig, cov ntawv tsis muaj carbonless muaj ob peb lwm yam txiaj ntsig. Nws yog qhov tsis sib xws ntau dua li cov ntawv carbon ib txwm muaj, vim tias tsis tas yuav txhawj xeeb txog smudging lossis staining. Carbonless ntawv tseem ua tau zoo dua rau kev lag luam, vim nws tso cai rau ntau cov ntawv luam tawm sai thiab yooj yim yam tsis tas yuav tsum tau cais cov kauj ruam ntawm kev sau cov ntaub ntawv rau hauv cov nplooj ntawv ntxiv.
Zuag qhia tag nrho, carbonless ntawv yog lwm txoj hauv kev zoo rau cov ntawv carbon rau cov neeg saib kom txo lawv cov hneev taw ib puag ncig yam tsis muaj kev cuam tshuam zoo lossis kev ua haujlwm zoo. Nrog nws cov txiaj ntsig ntau, nws tau pom tseeb tias cov ntawv tsis muaj carbon yuav txuas ntxiv yog qhov kev xaiv nrov rau cov lag luam thiab cov tib neeg ib yam nkaus.