Cov nyhuv ntawm prepress ua ntawm cov duab ntawm cov luam ntawv zoo (ib qho)
Peb yog lub tuam txhab luam ntawv loj hauv Shenzhen Tuam Tshoj. Peb muab tag nrho cov phau ntawv tshaj tawm, hardcover phau ntawv luam ntawv, ntawv thawm phau ntawv luam ntawv, phau ntawv phau ntawv hardcover, sprial phau ntawv luam ntawv, eeb stiching phau ntawv luam ntawv, phau ntawv luam ntawv, ntim ntawv thawv, daim ntawv qhia hnub nyoog, txhua yam ntawm PVC, cov khoom lag luam ntawv, sau ntawv, Cov menyuam yaus phau ntawv, ntawv nplaum, txhua yam hom ntawm cov ntawv tshwj xeeb xim luam ntawv cov khoom lag luam, cov twv txiaj ua si thiab lwm yam.
Yog xav paub ntxiv thov mus xyuas
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Ua ntej, vim li cas thiaj li luam tawm cov duab xav tau cov txheej txheem sau cia
Cov tshuab luam ntawv tau hloov zuj zus mus rau hauv kev siv ntau yam. Qhov tseeb, luam ntawv tuaj yeem ua tiav tsuas yog dej thiab cua, tab sis nws tsis yooj yim kom ua tiav qhov sib xws ntawm cov ntawv luam tawm thiab lub hauv paus. Siv lithographic offset luam ntawv, thiab ntau yam ntawm nws cov kev txwv tsis tau hloov pauv dhau lawm. Muaj ntau ntau qhov teeb meem uas zam tsis tau nyob rau hauv offset luam ntawv khoom. Cov teeb meem no yuav tsum tau kho nyob rau hauv qhov txheej txheem prepress los cia siab tias txaus siab luam ntawv. Cov khoom lag luam, cov kev txwv no suav nrog hauv qab no.
1. Qhov xim thiab lub suab nrov ntawm cov ntawv luam tawm yog qhov sib txawv ntawm cov xim thiab lub suab nrov ntawm tus thawj.
Ua ntej tshaj plaws, cov txheej txheem offset tsis tau txais tag nrho cov xim ntawm cov xwm, tab sis tsuas yog ib feem ntawm cov xim, uas tshwm sim los ntawm ntau yam tsis xws luag hauv tus number case, ntawv thiab cov txheej txheem luam ntawv siv nyob rau hauv cov txheej txheem luam ntawv. Cov xim daj, magenta, cyan, thiab cov xim dub yeej siv rau hauv kev luam ntawv muaj qhov tsis xws luag ntawm cov xim xim, thiab cov xim kab teeb ci rau lub ntsej muag ntawm cov xim daj zoo nkauj, magenta, thiab cyan tsis tiav, uas yog, xim xim zoo nkauj ntawm lub ntuj neeg ntiaj teb tsis tiav. Raws li qhia hauv qhov sib piv hauv daim duab 1, qhov tseeb ntawm lub qhov nkhaus kom nqus tau ntawm tus number case thiab qhov nkhaus nqus zoo tagnrho muaj qhov sib txawv heev, uas yog, lawv tsis tsuas yog nqus lub teeb nyob hauv thaj av spectral uas yuav tsum tau nqus, tab sis kuj nqus lub teeb nyob rau lwm qhov thaj chaw spectral, thiab qhov kev puas tsuaj Qhov tshwm sim ncaj qha ntawm kev nqus tau yog tias cov hue thiab saturation ntawm tus number case nyob deb ntawm qhov zoo tshaj peb thawj xim, thiab luam tawm yog siv tus cwj mem los qhia cov hue thiab qib. Yog li ntawd, qhov xim hloov ua haujlwm ntawm tus number case ncaj qha cuam tshuam rau kev ncaj ncees ntawm thawj daim qauv. Kev luam tawm nrog thawj xim inks nrog "ntxiv" nqus tsis tau ua ib qho kev hloov ua "xim hloov" uas zoo nkauj rau cov cheeb tsam xim ntawm luam ntawv.
Qhov ua rau qhov xwm txheej no hauv number case feem ntau vim yog qhov kev txwv ntawm yam tseem ceeb xws li cov xim thiab kev ua cov txheej txheem. Los ntawm kev sib piv ntawm Daim Duab 1, tus cwj mem daj muaj qhov tsawg tshaj plaws "ntxiv" nqus, yog li cov xim hloov ua haujlwm tau zoo tshaj plaws, tus cwj mem kua magent yog qhov thib ob, thiab tus cwj mem cyan muaj qhov tsis zoo xim ua yeeb yam.
Qhov thib ob, qhov tseem ceeb ntawm cov ntawv luam tawm yog tsim los ntawm cov xim ntawm daim ntawv, uas yog, ntawv kuj koom rau hauv kev tsim xim. Tom qab ntawd, yog hais tias daim ntawv dawb ntawm ntawv yog qhov txawv, nws yuav cuam tshuam xim ci ntsa iab thiab saturation ntawm qhov tseem ceeb ntawm daim duab, uas yuav cuam tshuam xim sib piv ntawm daim duab. Ib yam li ntawd, nws muaj ntau yam ua nrog cov qauv ntawv. Cov ntawv xov xwm yog cov khoom siv ntxeem tau, thiab cov kua mem tau yooj yim los ntawm cov fiber ntau, ua rau muaj qhov sib txawv ntawm qhov sib txawv ntawm qhov chaw luam ntawv, uas txo qhov luam ntawv ntom ntom, thiab thaj chaw dub yuav tsum tsis txhob dub. Cov ntawv npuag du, txheej txig tawm, tus number case yog adsorbed rau saum npoo, thiab lub teeb tawg yooj yim heev, ua rau cov xim tsaus "tsaus nti" thiab tsis muaj khaubncaws sab nraud povtseg.
Ntxiv rau, txoj siv tshuaj mesh-kho txoj kev siv luam ntawv kuj tseem cuam tshuam rau ntawm qhov ntau ntawm cov Hawj txawm. Hauv cov txheej txheem ntawm cov phaj tsim thiab luam tawm, cov duab kos thiab duab ntxoo tau yooj yim polarized, uas yog, cov ntsiab lus ntawm cov ntsiab lus thiab ntxoov ntxoo tau yooj yim ploj.
Rau cov xwm txheej saum toj no, nws yuav luag tsis yooj yim rau cov ntawv luam tawm thiab cov duab qub los mus txog rau tib lub suab nrov ntau yam. Yog li ntawv, kev ntom ntom ntom ntom ntaws ntawm qhov qub thiab cov ntawv luam tawm yuav tsum tau muab kho kom ua rau cov ntawv luam ntawv tau muaj kev cuam tshuam zoo tshaj plaws. Daim duab 2 qhia txog kev sib txheeb ntawm lub suab luam tawm ntawm qhov qub thiab cov ntawv luam tawm. Txoj kab ntsuas 45-kab ntawm daim duab ua piv txwv yog qhov zoo tagnrho luam tawm, uas yog, qhov ntom ntwm qub tsis hloov pauv los ntawm txhua daim phiaj (uas yog, tsis muaj lub suab nrawm dua) Daim qauv theej. Qhov xwm txheej no yuav luag tsis muaj peev xwm ua tau nyob rau hauv txoj kev luam tawm tam sim no. Nyob rau hauv ib txwm muaj xwm txheej, qhov ceev ntawm daim tseem tuaj yeem ncav cuag 3.0 lossis siab dua, thiab qhov ntom ntom ntawm cov ntawv luam tawm tuaj yeem ncav mus txog 1.8 lossis 2.0, thiab qhov ntom ntom ntuag tsawg dua li qhov ntsuas ntom ntawm qhov qub, yog li yuav ua li cas luam tawm cov teeb meem ua tiag tiag rov qab qhov qub, lossis yuav ua li cas rov qab nws zoo dua, Qhov no yog qhov luv luv ntawm cov txheej txheem luam ntawv tam sim no thiab tuaj yeem tsuas yog ua kom tiav. Lwm ob txoj kev rov ua tus nkhaus hauv daim duab qhia txog qhov sib piv tau yooj yim ntawm kev sib piv thaum qhov xav tau ntau yam yuav tsum tau ceev. Linear compression yog ib hom kev nyem uas tsis tsim nyog los ntawm cov nyhuv pom. Nws yog lub suab nrov uas tsis tuaj yeem luam tawm. Cov ploj ib nrab (piv txwv li, lub suab nrov nrog qhov ntom ntom zoo dua 1.8 yog poob tag nrho), tawm tsuas yog qhov ntau ntawm cov tonal ntom ntom ntom ntom ntom ntom uas tuaj yeem muab luam tawm, uas pom tseeb tsis tsim nyog. Lub arc yog technical compression copy nkhaus siv los ua kom ncaj nruab nrab ntawm cov duab nruab nrab. Los ntawm kev pom ntawm qhov pom, qhov ntsuas lub nrig ntawm qhov txheej txheem no yog qhov tsim nyog.
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2. Lub teeb xim nrum teeb meem ntawm cov duab thaum luam ntawv
Thaum peb ua cov duab ntawm cov zaub, yog tias cov ntawv ntsuas tau ntsuas zoo, cov xim ntawm daim duab yuav nyob zoo li qub, tab sis qhov no tsis txhais tau tias xim yuav zoo ib yam tom qab cov duab luam tawm. Txij li thaum cov zaub siv cov xim thiab cov xim kom ua tiav xim, Printing yog tiav los ntawm kev siv cov qauv txo xim, yog li luam xim yuav txawv. Qhov tseeb, tus number case uas yuav siv rau hauv kev luam ntawv yuav tsum muaj qhov teeb meem ntawm kev hloov xim, uas yog, yuav ua li cas thiaj paub qhov grey sib npaug ntawm tus number case siv. Luv luv, grey tshuav nyiaj yog hais txog kev sib xyaw xim uas tsim muaj xim grey. Piv txwv li, hauv RGB xim-ntxiv qhov chaw, thaum RGB peb xim nrog lub ci zoo sib xws tau sib xyaw, grey yog tsim, thiab cov xim liab, ntsuab, thiab xiav muaj lub teeb ci ntawm 200 yog tib yam li 25% grey. Qhov txho ntawm no tseem hu ua nruab nrab grey, uas yog lub suab grey tsis muaj xim txuam. Yog tias koj sib xyaw 210 liab, 200 ntsuab, 200 xiav, qhov tshwm sim yog grey nrog lub rhaub (cov khoom siv liab). Nws zoo li grey, tiag tiag nrog grey reddish, tsis muaj qhov nruab nrab grey. Lub teeb xim tau siv nyob ntawm no. Hauv thaj chaw RGB xim-ntxiv qhov chaw, peb lub xim tsuas yog yuav tsum muab ntxiv rau qhov sib npaug los tsim cov xim nruab nrab. Txawm li cas los xij, thaum nkag mus rau CMYK qhov chaw luam ntawv, qhov xwm txheej tsis yooj yim. Tus nqi qub ntawm daj, daj thiab ntsuab tsis ua qhov grey nruab nrab. Lawv tsim lub teeb ntais, muaj kev ua kom zoo dua ntxiv, ua qhov ci ntsa iab dua li qhov grey tiag tiag. Cov laj thawj rau qhov no yog vim qhov tsis xav kom nqus ntawm lub teeb xim los ntawm tus number case piav saum toj no (qhov nkhaus ntawm tus number case tsis zoo), uas yog, tshwm sim los ntawm qhov tsis dawb ntawm tus number case siv. Nyob rau hauv CMYK qhov chaw ntawm tus number case tiag tiag, kom tau txais cov xim grey, nws yog qhov tsim nyog yuav tsum nce tus nqi cyan number case. Cov xim ntsuab ntxiv ua rau lwm ob xim xaum kom huv. Piv txwv li, 30% cyan, 2l% magenta, thiab 21% daj yog sib xyaw los tsim 30% nruab nrab cov ntoo tshauv. Yog tias nws yog 30% cyan, 30% magenta, thiab 30% daj, lub tshauv nruab nrab uas ua los ntawm daj tsaus yuav tsaus xim av. Rooj ntawv 1 yog lus piv txho kev sib txig sib piv rau cov raug kua nyeem raug. Txog qee yam ntawm cov number case cov khoom, CMY tus nqi ntawm cov xim sib xyaw xim yog qhov tsis tu ncua, uas yog, tus nqi sib piv grey tus nqi ntawm ib qho number case tsis tu ncua, kom peb tuaj yeem ntsuas qhov grey tshuav ntawm tus number case, thiab tom qab ntawd raws qhov sib npaug Cov duab raug kho kom cov duab yuav raug luam tawm tuaj yeem tsim kho qhov txawv ntawm cov xim tom qab kho, yog li them nyiaj rau qhov tsis xws ntawm cov number case. Txawm li cas los xij, nws yuav tsum raug sau tseg tias cov ntaub ntawv sib npaug ntawm tus number case yog sib txawv.
3. Teev qhov teeb meem ntxiv
Offset printing siv qhov kev txiav txim ntawm lub siab hloov cov kua cwj mem. Thaum tus number case pauv mus rau qhov chaw ntawm daim ntawv nyob rau hauv siab, ib qho me me ntawm kev nthuav tawm tshwm sim vim los ntawm lwm yam xws li lub siab. Qee tus number case yog nqus rau hauv daim ntawv xov thiab kuj tseem ua rau lub cim kom nce ntxiv. Vim hais tias qhov teev loj tau ncaj qha ntsig txog lub suab thiab khaus, qhov teev sau ntxiv yuav ua rau tag nrho cov duab tsaus dua. Pom tseeb tias, rau cov txheej xwm saum toj no, sib txawv ntawm cov dot nce ntxiv yuav raug tsim rau cov tshuab luam ntawv sib txawv thiab cov ntawv zoo sib txawv. Tsis tas li ntawd, cov teev ntawm ntau qhov sib txawv nce lawv cov teev teev rau hauv qhov tsis sib xws. Qhov teev teev ua los ntawm cov ntawv thiab number case yam ntxwv nthuav tawm kev nthuav tawm kom nthuav dav. Lwm yam uas yuav tsum nco ntsoov yog nyob hauv tus txheej txheem ntawm cov duab tso tawm thiab luam ntawv, cov teev loj tuaj vim cov khoom siv thiab khoom siv.
Qhov teev ntxiv yog qhov tshwm sim tsis dhau vim tias muaj qee qhov tshwj xeeb hauv cov txheej txheem luam ntawv. Txhawm rau kom hais tawm cov xim tiag tiag thiab qib ntawm daim tseem, nws yog qhov tsim nyog los them rau kev cuam tshuam ntawm qhov teev ntawm qhov nce hauv cov txheej txheem prepress. Cov txheej txheem kev them nyiaj no tuaj yeem thov ncaj qha thaum lub sijhawm ua cov duab, lossis cov nuj nqi them tuaj yeem ntxiv rau cov ntawv ua ntej thaum lub sijhawm ua thiab tom qab ntawd them rov qab thaum luam ntawv thiab thaij duab.
Ntxiv rau qhov hais los saum toj no, muaj teeb meem xws li kev tswj hwm ntawm tag nrho cov kua mem thiab sau npe luam ntawv.
Hauv txoj kev xav, peb thawj xim ntawm cov xim CMY tuaj yeem tuaj yeem kho cov xim uas peb xav tau. Txawm li cas los xij, hauv kev luam tawm tiag tiag, qhov tsis txaus ntseeg ntxiv ntawm K, qhov laj thawj yog ntau yam, tsis yog hais dua ntawm no, tab sis thaum luam ntawv nrog CMYK number case, thaj chaw tsaus yuav tsim ntau tus number case, kom ua tiav super dub tsos thaum, piv txwv li , cov npog ntawm cov phau ntawv thiab ntawv xov xwm, tsuas yog K yog deb ntawm dub, feem ntau yuav tsum siv C50M50Y50K50, lossis tseem C100M100Y100K100, uas yog tsawg kawg 200% lossis tseem 400% ntawm cov kua txuam nrog. Txij li cov sib txawv substrates khaws cov number case nyob rau hauv kev muaj peev xwm sib txawv (piv txwv li, ntawv xov xwm khaws cov mem kua ntau tsawg dua li qib ua hmoov txheej), yog tias tsis muaj kev ntsuas los tswj tus nqi number case, qhov tsaus-hloov thaj tsam yuav dhau los, yog li poob tsaus theem. Cov. Yog li ntawd, nws yog qhov yuav tsum tau teeb tsa tag nrho cov kua mem hauv cov duab ua ntej.
Kev sau npe teeb meem yog qhov yuam kev uas tsis yooj yim tshwm sim los ntawm cov teeb meem ntawm cov tshuab luam ntawv, thiab tseem yog ib qho tseem ceeb hauv kev luam ntawv raug. Qhov teeb meem sau npe yog hais txog qhov tshwm sim ntawm cov teeb meem hauv qhov chaw luam ntawv thaum plaub txheej xim sib cais tau muab luam tawm tshwj xeeb hauv kev luam xim. Qhov teeb meem, tshwj xeeb tshaj yog nyob rau hauv high-precision xim luam ntawv, yuav tsis cuam tshuam rau cov tsos ntawm cov khoom tiav yog tias nws tsis daws. Hauv kev tsim kho kom zoo, txhawm rau zam kom tsis txhob muaj qhov tshwm sim tsis zoo uas tshwm sim los ntawm kev ua haujlwm tsis raug, cov teeb meem no yuav tsum raug txiav txim siab thiab daws teeb meem hauv kev tsim qauv thiab tshaj tawm hauv kev thov xim luam ntawv, uas yog cuab kev. Rau cov txheej txheem cuab, ntau tus neeg tsis nkag siab txog nws cov ntsiab lus, tshwj xeeb tshaj yog cov coob ntawm cov neeg siv duab nraaj, sau rau qee qhov tseem ceeb thaum teeb tsa, yog li yuav muaj teeb meem loj dua, nws zoo dua tsis txhob ua cov teeb tsa no.