Offset luam ntawv ua haujlwm hauv txoj kev yooj yim. Nws siv peb thooj voos kheej kheej los hloov ua cov duab xa mus rau lub zog. Thawj lub tog raj kheej haum nrog luam ntawv phaj. Daim duab ntawm daim duab yog nyeem "raug" lossis sau ntawv ntsej muag. Thawj lub tog raj kheej muaj mem hluav, daim duab hloov lossis hloov mus rau lub tog raj kheej thib ob, thiab lub tog raj kheej thib ob tau txau nrog daim ntaub roj hmab. Raws li qhov tshwm sim, daim duab ntawm lub tog raj kheej thib ob thim rov qab lossis dhau los ua qhov nyeem "yuam kev". Thaum kawg, cov duab hloov pauv los ntawm cov roj hmab npuag cov menyuam mus rau ib lub tog raj kheej thib peb lossis hauv av. Lub khob tso rau hauv yog ntsia rau ntawm lub tog raj kheej thib peb, tseem hu ua tus ntiv nplhaib tawm tswv. Daim duab thim rov qab hloov dua thiab dhau los ua qhov "raug" nyeem los yog tig mus rau hauv cov ntawv luam kawg.
Qhov tshwj xeeb ntawm offset luam ntawv yog tias cov duab thiab thaj chaw tsis yog duab yog tib theem qib. Cov txheej txheem luam ntawv siv cov roj thiab dej uas tsis tov nrog cov tshuaj lom neeg cov ntawv luam tawm tav toj los ntawm ib qhov chaw. Qhov tseeb, offset luam ntawv tau txais cov qauv no los ntawm lithography, yog li nws feem ntau kuj hu ua photolithography.
Cov hom offset presses
Nws muaj ob hom tseem ceeb ntawm cov offset presses:
Ib daim ntawv offset xovxwm: Hauv no offset xovxwm, luam tawm ntawm ib daim ntawv ntawm daim ntawv, vim tias lawv tau pub rau hauv xovxwm thaum ib zaug.
Yob cov ntawv offset xovxwm: Hauv no offset xovxwm, luam ntawv yog ua tiav rau ntawm ib pob ntawv txuas ntxiv ntawm daim ntawv pub los ntawm ntau lub ntim. Daim ntawv yog tom qab ntawd txiav rau hauv ib daim ntawv ntawm qhov xav tau loj.
Muaj ntau qhov sib txawv ntawm ntau hom kev pab cuam offset presses.
Offset luam ntawv txheej txheem
Txoj kev offset luam ntawv yuav tsum muaj ntau yam cuab yeej siv peev thiab teeb tsa. Txawm li cas los xij, ib zaug hauv cov txheej txheem hauv qhov chaw, offset luam ntawv nws tus kheej yog qhov pheej yig. Los ntawm kev tsim artwork rau kev ua haujlwm nias thiab khi, txoj kev ua luam offset muaj ntau yam kev kawm.
Daim ntawv thov ntawm offset luam ntawv
Kev luam ntawv yas ntxeem ntxeem tau txhua yam ntawm peb lub neej, cuam tshuam rau kev kawm los ntawm cov ntawv luam ntawv, ntawv tsim tawm thiab lwm yam khoom siv nyeem ntawv, thiab los ntawm kev tsim muaj cov ntawv ntim khoom lag luam. Ntau daim ntawv thov ntawm cov offset luam ntawv yuav nyuaj rau kev txiav txim siab, tab sis txaus los hais tias lub ntiaj teb yuav yog qhov chaw tsis tshua nyiam mus nyob uas tsis muaj kev luam tawm kev luam ntawv.
Yog li ntawv, offset printing yog cov thev naus laus zis luam ntawv uas ua rau ntawv xov xwm tuaj yeem, cov phau ntawv muaj peev xwm, thiab kev lag luam thiab tshaj tawm cov neeg dog dig.