Chaw ua hauj lwm ntawv yog ib qho ntawm cov khoom lag luam uas xav tau tshaj plaws rau cov chaw ua haujlwm, qhov zoo ntawm qhov cuam tshuam rau kev ua haujlwm ntawm cov chav ua haujlwm ntev thiab cov tsos ntawm cov ntaub ntawv. Daim ntawv no yuav tsum raug xaiv raws li cov haujlwm uas nws yuav ua - yuav ua li cas thiaj yog?
Kev faib tawm
Txhawm rau xaiv cov ntawv foos chaw ua haujlwm kom raug, koj yuav tsum txiav txim siab ntawm cov ntawv yuav tsum luam tawm thiab txheej txheem uas muaj rau qhov no. Conventionally, chaw ua haujlwm daim ntawv tau muab faib ua peb chav kawm. Chav Kawm "C" yog sawv cev los ntawm daim ntawv npaj rau kev luam ntawv txhua hnub ntawm tus nqi tsawg tsawg ntawm cov ntaub ntawv thiab muaj dav nyob rau hauv kev ua lag luam. Cov ntaub ntawv luam tawm ntawm qib ntawv no ua tau haujlwm zoo ntawm cov khoom siv hauv chaw ua haujlwm yooj yim.
Feem ntau, kev ua cov ntawv "C" chav kawm ntawv chav ua haujlwm, cov muag khoom muag cov khoom pheej yig zoo uas tsis tau ua raws cov qauv hauv ntau cov qauv ntsuas kom zoo.
Nruab nrab cov txiaj ntsig zoo yog "B" qib ntawv, uas yog siv rau qhov ntau ntawm cov ntaub ntawv thiab luam tawm ob sab. Nws ua tau raws li txhua qhov yuav tsum tau ua ntawm chaw ua haujlwm thev naus laus zis niaj hnub - tshwj xeeb, chav ua haujlwm B chav ntawv ntawv yog qhov zoo rau cov tshuab luam ntawv nrawm uas siv hauv cov chaw ua haujlwm loj thiab nruab nrab. Qeb A ntawv yog tsim rau luam ntawv cov ntawv ntawm laser xim luam ntawv, ntxiv rau monochrome printing, muab cov ntaub ntawv zoo tshaj plaws. Tsis zoo li qib "B" thiab "C", qib "A" daim ntawv muaj qhov kev xaiv ntau ntawm qhov ntom thiab ci / npoo ntawm daim ntawv.
Cov cwj pwm tseem ceeb ntawm cov ntawv ua haujlwm
Kev faib tawm ntawm cov ntawv ua haujlwm yog raws li nws kev ua raws li qee yam tshuaj lom neeg lossis lub cev, uas yog qhov tseem ceeb uas yuav tsum xav txog thaum xaiv daim ntawv rau lub chaw haujlwm. Ua ntej tshaj plaws, koj yuav tsum tau them sai sai rau txoj kev pom tseeb ntawm kev txiav cov npoo ntawm daim ntawv thiab nws cov duab - cov ntawv zoo siab muaj cov npoo huv thiab zoo. Txwv tsis pub, cov ntawv ntim ntawv yuav lo ua ke los yog txhuam thaum luam ntawv. Qhov ntsuas qhov tseem ceeb zoo ib yam yog cov ntawv dawb ntawm chaw ua haujlwm.
Lub tshuab ntxuav hniav dawb ntawm daim ntawv ua haujlwm tuaj yeem yog 98%, thaum 100% whiteness yog xyaum tsis dhau los hauv kev tsim cov ntawv txheeb.
Lwm qhov tseem ceeb yog qhov ya raws ntawm chaw ua hauj lwm ntawv - qhov tsawg dua nws yog, cov nplooj ntawv tsawg dua yuav txhuam thiab caws thaum lub sijhawm luam ntawv. Tus qauv noo noo ntsiab lus rau ntawv yog los ntawm 4.2% txog 4.5%. Hauv qhov no, daim ntawv yuav tsum tau muab tso rau hauv qhov chaw uas muaj kev tiv thaiv zoo los ntawm ya raws.
Thiab thaum kawg, cov txheej txheem classic ntawm chaw ua haujlwm ntawv - qhov hnyav thiab loj. Tus qauv luj rau cov ntawv no yog 80 grams tauj ib square meter, tab sis rau cov chav kawm A cov ntaub ntawv no daim duab tuaj yeem nce mus rau 280 grams. Qhov ntau thiab tsawg ntawm cov ntawv ua haujlwm muaj nyob hauv ob pawg - A4 thiab A3. Lawv raug xaiv raws li qhov loj ntawm daim ntawv yuav tsum tau luam tawm.
