Yuav ua li cas luam ntawv digital ua haujlwm zoo nrog kev tswj xim?
Lub Landa digital xovxwm, nrog nws ntau yam zoo xws li hom loj, kev kub ceev, dav xim gamut, dav adaptability, eco-kev phooj ywg, thiab kev sib txawv, tau dhau los ua ib qho kev xaiv rau ntau lub tuam txhab luam ntawv los daws sai, luv luv - khiav xaj. Yuav ua li cas seamlessly hloov ntawm cov tsoos offset luam ntawv thiab digital printing los ntawm kev tswj xim yog ib qho teeb meem siv tau rau ntau lub tuam txhab luam ntawv. Kuv lub tuam txhab tau tshaj tawm Landa digital xovxwm hauv xyoo 2022 thiab tau sau tseg qee qhov kev paub dhau los ntawm kev hloov pauv ntawm cov kev cai offset mus rau digital printing.
Lub tswv yim ntawm Xim Gamut Space
Ua ntej hloov ntawm cov khoom siv sib txawv, nws yog ib qho tsim nyog yuav tsum nkag siab qee cov qauv txheej txheem. Lub International Color Consortium (ICC) tau teeb tsa cov qauv kev lees paub thoob ntiaj teb rau kev tswj xim kom raug txheeb xyuas cov yam ntxwv xim, hu ua 'ICC profiles.' Txhua lub cuab yeej muaj nws cov xim tshwj xeeb, thiab ICC profile muaj cov ntaub ntawv hauv qab no.
1. Xim qhov chaw yam ntxwv
Xim qhov chaw piav qhia cov xim gamut ntawm ib lub cuab yeej, txhais tau tias ntau yam xim uas lub cuab yeej tuaj yeem ntes lossis tso tawm. Txij li thaum Landa digital xovxwm siv xya xim (CMYKBGO), nws cov xim gamut loj dua li cov ntawv luam tawm ib txwm muaj (CMYK). Kev sib piv ntawm Landa digital xovxwm cov xim gamut nrog Fogra39 thiab GRACoL2013 gamuts yog qhia hauv daim duab 1, qhia tias Landa digital xovxwm cov xim gamut loj dua Fogra39 thiab GRACoL2013 gamuts.
Landa digital xovxwm xim gamut
Fogra39 thiab GRACoL2013 Xim Gamut
Daim duab 1 Gamut Comparison
2. Dawb Point
Lub ntsiab lus dawb yog hais txog txoj hauj lwm ntawm cov dawb hauv qhov chaw xim. Nws txiav txim siab cov xim sawv cev ntawm qhov ci tshaj plaws ntawm cov duab (feem ntau yog dawb). Nws ua lub luag haujlwm tseem ceeb hauv kev tsim cov xim kom raug thiab tswj cov xim sib xws, thiab nws tseem yog ib qho tseem ceeb siv rau kev ntsuam xyuas cov khoom siv xim.
3. Gamma nkhaus
Lub gamma nkhaus piav qhia txog kev sib raug zoo ntawm cov teeb liab input (feem ntau yog qhov ci ci) thiab cov ntaub ntawv tso tawm. Nws yog tsuas yog siv los kho cov teeb pom kev zoo ntawm cov khoom siv xws li saib thiab cuam tshuam li cas qhov tsaus ntuj thiab ci qhov chaw ntawm cov duab pom.
4. Cov lus hloov xim xim
Ib lub rooj hloov xim tuaj yeem tsim ib daim ntawv qhia nruab nrab ntawm qhov chaw xim ntawm qhov khoom siv thiab lub hom phiaj ntaus ntawv.
Kev nkag siab txog cov hauv paus ntsiab lus ntawm kev tswj xim yog qhov tseem ceeb heev rau peb cov ntaub ntawv tom ntej. Txij li thaum Landa digital xovxwm muaj cov xim loj loj thiab cov xim saturation siab, cov xim gamut ntawm tsoos offset luam ntawv tsis tuaj yeem ncav cuag nws. Yog tias kev txiav txim loj, thiab tom qab ntawd nws yuav rov qab mus rau cov khoom lag luam offset, peb yuav tsum npaj cov ntaub ntawv ua ntej. Qhov no txhais tau tias ua cov ntaub ntawv pov thawj me me thiab tsim khoom siv cov gamut me me ntawm Landa xovxwm, nrhiav cov haujlwm sib xws ntawm cov xim qub hauv Landa xovxwm gamut kom nws yuav yooj yim dua rau cov xim thaum hloov rov qab mus rau kev luam ntawv offset yav tom ntej.
Tsim Gamut Chaw ntawm Landa Digital Press
Peb siv cov txheej txheem kev tswj xim xim zoo li ORIS CGS X Gamut lossis EFI Fiery txhawm rau txheeb xyuas thiab sau cov yam ntxwv ntawm cov cuab yeej. Ua ntej no, cov cuab yeej yuav tsum tau ua qauv thiab calibrated.
1. Sau cov cuab yeej Profile ICC: EFI Fiery Xim Matching Method
Siv Xim Profiler Suite (CPS) hauv EFI Fiery uas los nrog Landa digital xovxwm los sau ICC. Los ntawm kev sau siv CMYKOGB 7C, peb tau txais qhov siab tshaj plaws gamut qhov chaw ntawm lub cuab yeej, uas sawv cev rau Landa digital xovxwm cov cuab yeej profile ICC.
Cov txheej txheem sau ICC hauv CPS tus thawj tswj hwm ntawm EFI Fiery yog tus pab cuam - coj. Tua tawm lub calibrator muaj nuj nqi thiab ua kom tiav cov kauj ruam raws li nram no:
Kauj Ruam 1: Linearization (xyuas thiab kho cov xwm txheej zoo);
Kauj ruam 2: Ink txwv (rau Landa digital xovxwm, tsuas yog mus txog 220%);
Kauj ruam 3: Xim siv (xyuas seb 7C tonal nkhaus match zoo li ntuj);
Kauj Ruam 4: Kev sau ntau tshaj gamut (2700 xim thaj ua rau thaj).
All four steps must be done for each type of paper (the principle is if the Delta of paper white difference >3, yuav tsum tau ua). Qhov no ua kom ntseeg tau tias qhov gamut rau txhua hom ntawv raug sau kom raug, thiab cov ntawv sau ICC tuaj yeem simulate cov hom phiaj xim.
Cov hom phiaj suav nrog cov xim xim thiab cov qauv luam ntawv tau ua raws. Txoj kev no tsis ua raws li cov txheej txheem xim lub hom phiaj tab sis siv CMYKOBG-CMYK ib- lub sijhawm hloov pauv txoj kev kom ncav cuag lub hom phiaj qhov chaw ib zaug, ua tiav Fogra39, Fogra51, lossis GRACoL2006, GRACoL2013 lub hom phiaj. Txij li Landa digital xovxwm 7C gamut tag nrho suav nrog txhua qhov chaw xim raws li cov qauv ISO 12647-2, EFI Fiery lub zog algorithms tuaj yeem raug simulate hauv ib kauj ruam, thiab kev xyaum tau ua pov thawj qhov no.
2. Sib txuam xim qauv hom phiaj
Lub hom phiaj CMYK ICC hauv EFI Fiery yuav tsum sib haum nrog ICC ntawm daim ntawv siv tiag tiag. Yog tias daim ntawv yuav khoom tau sib xws nrog cov qauv ntawv dawb, tus qauv Fogra lossis GRACoL tuaj yeem siv ncaj qha. Txwv tsis pub, nws raug nquahu kom hloov kho lub hom phiaj ICC raws li daim ntawv dawb tiag tiag, tom qab ntawd tsim lub ICC tshiab rau daim ntawv thov. Cov xim parameter nqis tau pom hauv daim duab 2.
Daim duab 2 Xim Parameter Chaw nyob hauv EFI Fiery
Los ntawm kev teeb tsa kom raug thiab luam tawm TC1617 daim ntawv qhia, kev tshuaj xyuas xim zoo li Curve tuaj yeem siv los xyuas seb cov ntawv luam tawm puas tau raws li txhua qhov ntsuas. Peb txheeb xyuas siv tus qauv IDEAlliance G7. Qhov kawg PASS qhia tias txhua qhov kev ntsuas xim ua tau raws li cov qauv thiab ua raws li cov hom phiaj xim.
Lub sijhawm no, luam ntawv ntau lawm tuaj yeem ua raws li cov hom phiaj xim sib xws.
Tsim Tsob Ntoo Offset Xim Gamut
Qhov no yuav tsum muaj kev tswj hwm xim software zoo li ORIS CGS X Gamut. Cov txheej txheem yog tib yam li cov txheej txheem rau Landa digital luam ntawv, yog li nws yuav tsis rov ua dua ntawm no.
Kev hloov pauv ntawm Digital Printing thiab Traditional Offset
CMYK Plaub -Xim Overprinting Matching Methods
1. Thawj Qhov Kev Txiav Txim Tshiab
Rau kev txiav txim tshiab, tsis tas yuav muab piv rau cov xim ntawm cov khoom qub thiab cov khoom tshiab rau cov neeg siv khoom, uas ua rau nws yooj yim los tswj. Qhov kev txiav txim siab tseem ceeb yog seb nws puas yuav tsum tau hloov mus rau offset luam ntawv yav tom ntej. Thaum pib, nws yog ib qho tseem ceeb los xyuas seb tus neeg siv khoom xav tau European tus qauv Fogra39, Fogra51, lossis US tus qauv GRACoL2006, GRACoL2013 lub hom phiaj. Yog hais tias yav tom ntej hloov dua siab tshiab rau ib txwm offset yog xav tau, xaiv ib tug me me gamut ICC rau ntau lawm; txwv tsis pub, tsuas yog siv Landa cov tshuab luam ntawv ICC kom txaus siab rau qhov dav tshaj plaws ntawm cov xim saturated.
2. Hloov cov tsoos Offset CMYK rau Digital Printing
Peb lub tuam txhab tam sim no siv CGS xim tswj qhov system. Ua ntej, peb ua ntej - kho cov ntaub ntawv xim nrog Epson's digital proofing system ntawm prepress theem. Thaum ob qho kev kuaj pom thiab ntsuas cov ntaub ntawv dhau, cov ntaub ntawv raug xa mus rau Landa lub tshuab luam ntawv digital rau kev tsim khoom thiab tsim khoom.
Here, we use the ICC files we previously created for traditional offset and Landa digital printers. CGS software helps find the corresponding relationship between the Landa digital printer and traditional offset color spaces, directly matching the Landa printer's ICC gamut to the print target ICC, i.e., Landa digital printer 7C.icc ->CMYK.icc. Vim tias Landa lub tshuab luam ntawv xim gamut loj txaus, kev sib raug zoo sib xws tuaj yeem pom nyob hauv nws qhov chaw xim tag nrho. Cov txheej txheem tswj cov xim tam sim no yog qhov ntse heev, thiab ua raws li cov txheej txheem txheej txheem tuaj yeem ua tiav cov txiaj ntsig xav tau.
3. Hloov cov xim Offset Spot Xim rau Digital Printing
Cov cwj mem siv los ntawm Landa lub tshuab luam ntawv tuaj yeem tsim tawm 96% ntawm lub tsev qiv ntawv Pantone xim thoob ntiaj teb, thiab cov xim sib txawv tuaj yeem ua kom zoo rau hauv qab 2. Siv CGS X Gamut, cov xim xim tuaj yeem ua ntej- sib npaug, ntsuas ua ntej ntau lawm seb puas muaj kev sib tw tag nrho thiab txheeb xyuas 4% ntawm cov xim uas tsis tuaj yeem sib phim ua ntej.
Vim tias cov ntawv sib txawv muaj qhov sib txawv ntawm Lab, qhov no cuam tshuam rau qhov kawg ntawm qhov chaw xim. Peb twb tau tsim cov ntaub ntawv ICC yav dhau los rau ntau hom ntawv thiab teeb tsa cov ntawv hloov pauv hloov pauv hauv CGS X Gamut, uas ua rau muaj txiaj ntsig zoo ntawm software hloov kho peev xwm los tswj cov xim xim.
Hauv CGS X Gamut, koj tuaj yeem xaiv cov xim kho qhov chaw (saib daim duab 3). Cov cuab yeej profile sawv cev rau qhov siab tshaj plaws xim gamut rau daim ntawv tam sim no. Los ntawm kev xaiv cov txheej txheem suav tshwj xeeb rau cov xim xim, cov xim tsis sib xws hauv CMYKOGB kev sib cais tuaj yeem raug cais tawm los simulate cov xim xim. Ntawm qhov kev sib tshuam no, cov neeg siv tuaj yeem ua ntej - ntsuas tus qauv thiab nruj xim sib txawv qhov tseem ceeb hauv cov tsev qiv ntawv xim. Raws li pom nyob rau hauv lub thawv liab hauv daim duab 3, tawm ntawm 2,161 Pantone qhov chaw xim, 96.02% poob rau hauv cov qauv xim sib txawv ntawm 3.5, thiab 90.745% poob hauv cov xim sib txawv ntawm 2.
Daim duab 3 Spot Color Correction
Muab ob npaug rau- nyem rau ntawm qhov chaw xim tso cai rau koj saib thiab hloov kho cov qauv tsim nyog thiab delta E ntawm qhov chaw xim. Koj tuaj yeem ua kom zoo - kho qhov piv ntawm ib qho xim. Yog tias delta E tsawg dua 1, nws txhais tau tias tom qab luam ntawv nrog Landa digital xovxwm, cov xim xim tuaj yeem ua tau raws li cov xim sib xws, thiab delta E ua tau raws li cov qauv xim sib xws. Siv lub simulation muaj nuj nqi ntawm cov kws tshaj lij software, koj tuaj yeem luam N cov xim ntawm ib daim ntawv tsis muaj nqi ntxiv, uas yog qhov kev txhawb nqa loj rau cov tuam txhab luam ntawv.
Dhau li ntawm kev kwv yees ua ntej nrog CGS X Gamut, yog tias tseem muaj qhov sib txawv me ntsis hauv kev tsim khoom tiag tiag, koj tuaj yeem ua tau zoo - kho lawv siv EFI Fiery hauv Landa digital printing kom ua tiav cov txiaj ntsig zoo tshaj plaws. Cov txiaj ntsig zoo tiag tiag- kho cov txiaj ntsig kuj tuaj yeem muab rov qab rau hauv CGS X Gamut rau kev kho, kom cov khoom tom ntej tuaj yeem luam cov xim xim nrog qhov sib tw zoo dua raws li cov txheej txheem ib txwm muaj, raws li pom hauv daim duab 4.
Daim duab 4 Xim txawv yog tsawg dua 1 tom qab hloov xim xim