Txhais tau thiab cov hau kev ntawm kev tswj cov ntawv luam tawm
Peb yog ib lub lag luam loj hauv Shenzhen Tuam Tshoj. Peb muaj cov phau ntawv luam tawm, phau ntawv nyuaj, phau ntawv luam ntawv, phau ntawv nyuaj, phau ntawv luam tawm, phau ntawv luam tawm, phau ntawv luam tawm, lub thawv ntim, daim qhia ntawv, txhua yam ntawm PVC, cov ntawv luam tawm, ntawv sau cia, hom tshwj xeeb ntawv xim luam tawm khoom, kev ua si cardand li ntawd.
Yog xav paub ntxiv, thov tuaj xyuas
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Lub ntsej muag nrog Tuam Tshoj txoj kev nkag mus rau WTO, raug nplua tau luam tawm yog nyob rau hauv kev mob siab. Kuv ntseeg tias tag nrho cov phooj ywg yuav ua zoo tswj rau saum daim ntawv, vim hais tias nyob rau hauv kev sib tw ua lag luam, "cov neeg yuav khoom yog Vajtswv." Nws twb yog lub hauv paus ntawm kev lag luam kev lag luam. Cia peb tham txog qee yam ntawm kuv qhov kev paub thiab kev ua haujlwm ntawm kev tswj kom muaj kev tswj kom zoo.
Ua ntej, Cov ntsiab lus thiab kev tshuaj ntsuam xyuas kev tswj kom zoo
Cov ntsiab lus ntawm kev tiv thaiv zoo yog: dot, qhov tseeb ntawm kev luam xim, thiab kev ruaj ntseg ntawm cov txheej txheem luam ntawv. Mesh tus nqi (mesh loj) ntawm cheeb tsam overprint yog qhov tseem ceeb tshaj plaws kev tswj kav. Qhov tseeb, muaj lwm yam uas cuam tshuam txog qhov zoo ntawm kev luam, xws li lub nplhaib dawb dawb, muab tshuaj, khib nyiab, thiab tsis muaj tseeb. Yog vim li cas rau tus neeg tau txais kev tsis txaus siab yog tias qhov xim ntawm daim tseem thiab cov qauv luam tawm. Feem ntau, qhov tseem ceeb tshaj plaws rau qhov sib txawv ntawm cov ntawv sau thiab cov luam tawm hauv cov ntawv luam tawm yog qhov kev ua tsis raws kev luam ntawv. Hauv cov xim luam ntawv, cwj mem film thickness, cot size, ink number case tshaj, thiab xim xaj daim ntawv txiav txim yog lub hauv paus tseem ceeb uas cuam tshuam rau kev ncaj ncees ua luam ntawm xim. Tau kawg, nws yog qhov yuav tsum tau them sai sai seb qhov kev txiav txim ntawm cov xim txawv txawv feem ntau cuam tshuam thiab txwv los ntawm ntau lwm qhov chaw. Tam sim no soj ntsuam txog peb yam tseem ceeb:
1, number case film thickness
Thaum lub phaj ntawv tiav lawm, lub tshuab luam ntawv tuaj yeem cuam tshuam cov thickness ntawm tus cwj pwm zaj duab xis. Lub sijhawm no, nws yog qhov tsim nyog yuav tsum muaj kev ntsuas tsis muaj lub hom phiaj thiab lub hom phiaj kev ntsuas kom pom cov thickness ntawm tus cwj pwm zaj duab xis. Rau coated ntawv, lub thickness ntawm tus number case txheej yuav tsum tswj ntawm 0.7 thiab 1.1 um. Yog hais tias qhov tuab ntawm cov duab thaij duab tshaj qhov sib txawv no, qhov xim qhov chaw yuav muab ua dua yog txo. Feem ntau, ntau dua presses, nruab nrog on-line los yog phau ntawv densitometers, tsis tu ncua saib lub thickness ntawm tus number case txheej thiab ua kev kho thaum tsim nyog.
2, qhov loj ntawm qhov hluav taws xob
Qhov loj ntawm qhov teev yog lwm qhov kev txiav txim siab hauv kev txiav txim siab qhov kev luam ntawv zoo. Cov phaj ua thiab offset printing txheej txheem yuav hloov cov teev. Yog li ntawd, qhov dot enlargement, sharpening, deformation thiab ghosting ntawm txhua txoj kev yuav tsum tau nruj me ntsis tswj. Peb tuaj yeem siv cov kab xev luam tawm thiab cov cuab yeej yoojyim ntawm lub iav kom pom cov kev hloov ntawm lub sijhawm. Thaum lub caij offset luam ntawv, qhov tshwm sim muaj tshwm sim tshwm sim. Dab tsi yog qhov yuav tsum ua kom qhov nce qhov poob ntawm qhov txheej txheem ua ntej qhov kev luam ntawv. Feem ntau, zaj yeeb yaj kiab rau kev lag luam luam tawm thiab cov duab dav ntawm cov teeb meem luam tawm yog:
FF: zaj duab xis qhov loj: 20%, 40%, 80%, 100%
FD: Luam cov ntawv sau: 30%, 55%, 90%, 100%
Qee lub sij hawm peb siv lub densitometer los ntsuas qhov ceev ntu ntawm thaj tsam ntawm ib nrab, thiab lub cev ntom nti siv tus qauv ntawm Murry-Davies los xam cov nqi mesh ntawm cheeb tsam ib nrab: F (%) = (1-10-F) / (1 - 10-D)
Thaum ntom ntom nti nrog lub densitometer, nws yuav tsum tau xiam yav dhau los ntawm cov lus qhia ntawm cov ntawv uas siv los tshem tawm cov teebmeem ntawm cov khoom siv ntawm cov ntawv ntawm tus lej xim. Nyob hauv qhov tseeb, thaum peb ntsuas cov duab ntawm cov duab peb lossis ntau tshaj qhov sib txawv hauv qhov chaw ceev, peb siv tau cov qauv ntawm Murry-Davies los xam cov nqi ntawm cov ntawv luam tawm, thiab raws li cov ntaub ntawv no thiab cov dot loj tus nqi ntawm cov zaj duab xis coj los, peb tuaj yeem kos Ib tus yam ntxwv cwj pwm, tus cwj pwm ntawm tus luam ntawv curve.
1 yog txoj kab zoo tagnrho (tsis tuaj yeem muab tau raws li qhov kev coj ua)
2 yog txoj kab tseeb
3 Lub cheeb tsam nruab nrab yog qhov nce ntawm qhov teev
Txhawm rau ua kom cov lag luam muaj peev xwm nthuav dav thiab tswj tau hauv cov txheej txheem, ob qhov sib txawv ntawm cov kev lag luam uas muaj nyob rau hauv cov phaj ua thiab kev luam ntawv tuaj yeem muab nthuav tawm thiab them nyiaj ntxiv. Photoshop siv ntau txoj hauv kev los pab tiv thaiv kev nthuav dav ntawm cov dots tshwm sim los ntawm luam tawm thiab luam ntawv.
A: Network expansion thiab nyiaj raug mob hauv cov txheej txheem luam ntawv
Siv Cov Ntaub Ntawv / CMYK Lub Teeb Sib Tham Xov Xwm yog xaiv los xaiv qhov standard dot nce nqi thiab cov kev cai nce qhov nkhaus los txhawm rau txhawm rau qhov kev nce nqi.
Standard dot gain value: Tus qauv teev kev nce nqi tsim los ntawm tus software raws li cov ntawv sib txawv thiab tus lej cim txuam.
Dot nce curve: Qhov muaj nqis ntawm qhov sib txawv xim thaiv yog ntsuas los ntawm densitometer, thiab mesh tus nqi thiab qhov sib piv tus nqi yog xam los ntawm MD equation. Los ntawm DotGain rub-down zaub mov, xaiv Curves los qhia txog qhov txiaj ntsig qhov nce nqi txog 13 points. Ntawm chav kawm, tus nqi loj ntawm qhov loj me me ntawm lwm qhov chaw yog xam los ntawm software automatic interpolation.
B: compensate qhov kev nce nqi nrog txoj kev xa mus
Yog hais tias cov duab tso tawm cov khoom siv tsis zoo thiab tsis yog calibrated, daim duab yuav raug txo los yog loj dua thaum cov duab muab xa mus rau zaj duab xis. Hauv qhov no, qhov kev hloov ua haujlwm ntawm PostScript technology tuaj yeem siv (Hloov).
Muaj nuj nqi) kom them nyiaj ntxiv.
Cov kauj ruam:
(1) Tsim tawm cov duab C, M, Y, thiab K uas muaj 13 gray blocks ntawm qhov siab tshaj plaws ntawm qhov kev ntaus tawm uas yog siv los ua plaub daim xim sib cais.
(2) Cov dot thaj chaw ntawm 13 xim thaj ua rau thaj yog ntsuas los ntawm kev sib kis kab mob kis kab mob.
(3) Nias ntawm nplooj ntawv / nplooj ntawv
Hauv kev sib txuas ntawm lub teeb, Lub Hloov mus khawm nkag mus rau qhov kev xa ntawv muaj nuj nqi.
(4) Xam tej yam yuav tsum tau hloov thiab nkag rau hauv cov thawv ntawv.
Tsis hais los ntawm txoj kev them nyiaj, qhov nyiaj hloov yog zoo li yog tias qhov pixel nqi yog 127, 50% ntawm cov dots yuav tsum tau tso tawm, tab sis yog tias 60 feem pua ntawm cov khoom tso tawm ntawm lub koob yees duab tshuab nthuav dav li 10%, cov nyiaj raug kho yuav tsum yog 50% -10. % = 40%, lub thawv yuav tsum tau sau nrog 40%, ces tus yees duab tshuab yuav tawm ntawm 50% ntawm cov ntsiab lus hauv network uas tus neeg siv xav tau.
3, number case tshaj thaus thiab xim sib lawv liag
Txij li thaum ntub luam ntawv yog tam sim no siv nyob rau hauv cov xim luam yeeb, cov ntawv sau npe xim tau raug hloov, feem ntau KCMY. Thiaj li ua kom cov cwj mem npog muaj ntau dua, nws yog ib qho zoo uas yuav tsum tau ua kom tuab lub xauv npo ntawm cov me me kom loj, uas peb muaj:
Dub number case thickness = 0.8um ntsuab number case thickness = 0.9um
Product ink number thickness = 1.0um daj number case thickness = 1.1um
Qhov ob, lub luag hauj lwm ntawm kev tswj kev sau ntawv hauv kev lag luam zoo
Raws li tau hais los saum toj no, cov ntawv tswj kev siv luam yeeb yog siv los tswj cov xim sib cais, phlu raug, xim kev luam, kev ua haujlwm, thiab kev luam ntawv. Tam sim no muaj ntau yam tswj tuav xws li Brunel, FOGRA, GATF, thiab Suav Academy ntawm Sciences. , tab sis qhov kev ua tau zoo tib yam, feem ntau muaj cov nram qab no.
A: Qhov chaw tiag
Cov ntawv luam tawm yuav tsum muaj qhov sib txawv, K = (DV-DR) / DV yog siv los ntsuas cov duab sib txawv, kev hloov pauv, kev tsis sib haum xeeb, DV yog qhov ceev, thiab DR yog 75% dot print density.
B: Qhov chaw tshaj saud
Qhov tseem ceeb xyuas cov ntaub ntawv uas thawj xim lees txais qhov thib ob xim thiab peb lub xim, cuam tshuam tus nqi ntawm tus nqi, uas cuam tshuam lub thickness ntawm tus number case txheej.
C: Cov chaw phaj raug cheeb tsam
Nws yog siv los xyuas qhov ceev qhov muag thiab cov ntawv xov xwm los txiav txim siab txog qhov raug phom sij ntawm kev txiav txim siab. Feem ntau, cov ntawv pov thawj khaws cia 2% ntawm cov khoom me me, thiab cov ntawv xov xwm khaws cia 5% ntawm cov khoom noj. Raug kev tswjhwm: Feem ntau, nws yog 3 txog 4 theem siab tshaj qhov sib xyaw ua ntawm qhov kev daws teeb meem ntawm thawj lub phaj.
D: ghosting thiab deformation
Tus deformation ntawm qhov kev tshawb nrhiav pom tau muaj qhov kev ntxub ntxaug ntawm longitudinal, lateral thiab bidirectional deformation, thiab tau mus ncaj qha ntes lub siab, seb daim pam yog xoob, seb tus nqi ntawm tus number case thiab cov dej npaum li cas.
E: cheeb tsam ib nrab
Tshawb nrhiav qhov kev nthuav tawm ntawm cov kev tshaj tawm ntawm cov kev lag luam
F: thaj tsam tshuav ntawm grey
Siv los xyuas txog kev hloov xim thiab ua kom tsis muaj grey seem yog qhov tseem ceeb rau kev tso siab ncaj ncees ntawm cov xim.
Nws yog tsim nyog hais tias kev tswj fwm tsis tuaj yeem muab luam tawm. Lub ntug ntawm qhov ntsuas kab tawm los ntawm lub khw tsim tawm. Tom qab luam, lub ntug qhov muag plooj thiab qhov dot yog loj dua.
Kuv zoo siab pom tias Tuam Tshoj luam tawm kev lag luam maj mam pib ntawm txoj kev ntawm cov ntaub ntawv thiab kev tswj tus qauv. Txawm hais tias muaj qee qhov tsis muaj teeb meem hauv kev tsim qauv ntawm cov ntaub ntawv luam tawm, cov kev xav ntawm cov neeg ntawm kev pom yuav txhim kho sai li sai tau. Ntawm chav kawm, rau kev tswj ntawm offset zoo, kev paub ntawm cov kws kho mob kuj yog ib qho tseem ceeb heev. Kuv ntseeg hais tias nyob rau hauv kev sib koom tes ntawm ntau cov tog neeg ntawm Tuam Tshoj tus offset luam ntawv tswj kev tswj, kev tswj zoo thiab kev siv cov xim tswj kev lag luam yuav twv yuav raug hu ua qhov zoo ntawm cov khoom luam tawm ib kauj ruam.