Cov txheej txheem ntawm Offset Printing yog dab tsi?

Offset printing, tseem hu ua lithography, yog cov txheej txheem luam ntawv dav siv los ua cov ntaub ntawv luam tawm zoo hauv ntau ntau. Cov txheej txheem yuav hloov tus cwj mem los ntawm lub phaj luam ntawv mus rau lub tog raj kheej roj hmab thiab tom qab ntawd mus rau qhov chaw luam ntawv (feem ntau yog ntawv lossis duab los qhia). Offset luam ntawv yog qhov zoo tagnrho rau ntau yam kev siv, nrog rau cov ntawv xov xwm, cov ntawv xov xwm, cov phau ntawv, daim ntawv qhia, ntim, thiab cov ntaub ntawv tshaj tawm. Nov yog cov ncauj lus kom ntxaws txog cov txheej txheem luam ntawv offset:

Prepress Phase:

Lub sijhawm prepress ntawm offset luam ntawv suav nrog kev npaj cov duab kos duab, tsim cov ntawv luam tawm, thiab teeb tsa cov xovxwm luam ntawv. Cov kauj ruam tseem ceeb hauv theem prepress muaj xws li:

Kev Npaj Artwork: Cov duab kos duab, ntawv nyeem, thiab cov duab yuav tsum luam tawm yog tsim los yog tau txais los ntawm cov neeg siv khoom siv duab kos duab. Cov ntaub ntawv digital tau ua tiav thiab ua kom zoo rau kev luam ntawv, suav nrog kev kho xim, kho duab, thiab kho qhov teeb tsa.

Xim sib cais: Yog tias daim duab kos duab muaj ntau xim, nws raug muab cais ua ib qho xim raws (cyan, magenta, daj, thiab dub) siv software tshwj xeeb. Txhua xim sib cais yog siv los tsim ib daim ntawv luam ntawv cais rau cov xim ntawd.

Phaj Imaging: Cov ntawv luam tawm yog tsim los siv cov txheej txheem hu ua computer-to-plate (CTP) imaging, uas cuam tshuam nrog kev nthuav tawm cov phiaj xwm teeb pom kev zoo nrog cov duab digital uas tsim los ntawm cov xim sib cais. Cov phiaj yog tom qab ntawd tsim kom pom cov duab los luam tawm.

Phaj luam ntawv:

Thaum cov ntawv luam ntawv tau npaj, lawv tau muab tso rau ntawm lub phaj cylinders ntawm offset printing xovxwm, thiab cov txheej txheem luam ntawv pib. Lub sijhawm luam ntawv muaj ob peb kauj ruam:

Phaj Cylinder Rotation: Lub phaj cylinders tig raws li lub tshuab luam ntawv tau teeb tsa, nqa txhua daim ntawv luam ntawv rau hauv kev sib cuag nrog cov number case chais thiab daim pam cylinders ua ntu zus.

Daim ntawv thov Ink: Ink yog kis los ntawm tus number case chais mus rau cov ntawv luam ntawv, qhov uas nws adheres rau cov duab cheeb tsam. Cov cheeb tsam uas tsis yog duab ntawm cov phiaj yog coated nrog cov dej-raws li kev daws teeb meem, tshem tawm cov cwj mem thiab ua kom huv si tom qab.

Hloov mus rau daim pam lub tog raj kheej: Daim duab inked ntawm cov ntawv luam ntawv yog xa mus rau hauv lub tog raj kheej roj hmab daim pam. Cov roj hmab daim pam lub tog raj kheej siv lub siab rau daim ntawv lossis cov duab los qhia thaum nws dhau los ntawm cov xovxwm, xa cov duab kos rau ntawm qhov chaw luam ntawv.

Printing Surface Contact: Lub tshuab luam ntawv nto (feem ntau yog ntawv lossis duab los qhia) yog pub rau hauv xovxwm thiab coj mus rau hauv kev sib cuag nrog daim pam lub tog raj kheej. Lub siab los ntawm daim pam lub tog raj kheej hloov cov duab inked mus rau qhov chaw luam ntawv, tsim kom muaj kev pom zoo.

Xim sau npe: Lub tshuab luam ntawv tau ua tib zoo hloov kho kom ntseeg tau tias kev sau npe ntawm txhua txheej xim. Cov ntawv sau npe rau ntawm daim phiaj luam ntawv thiab luam ntawv saum npoo pab kho cov xim kom meej, ua rau cov duab ntse, huv si.

Phase tiav:

Tom qab luam ntawv, cov ntaub ntawv luam tawm tuaj yeem ua tiav cov txheej txheem ntxiv los txhim kho lawv cov tsos thiab kev ua haujlwm. Cov txheej txheem ua tiav feem ntau suav nrog:

Qhuav: Cov ntaub ntawv luam tawm tau qhuav siv cov cua sov los yog cua tshuab ziab khaub ncaws kom tsis txhob muaj smudging thiab xyuas kom lub sij hawm kom qhuav sai.

Trimming thiab txiav: Cov ntawv luam tawm raug txiav thiab txiav kom loj siv cov cuab yeej txiav. Qhov no tshem tawm cov ntawv tshaj tawm lossis cov duab los qhia thiab ua kom cov khoom sib xws hauv cov khoom tiav.

Folding: Cov ntaub ntawv luam tawm tuaj yeem muab tais rau hauv qhov kev xav tau siv cov khoom siv folding. Qhov no feem ntau yog siv rau cov ntawv qhia, cov ntawv sau, thiab lwm cov ntaub ntawv ntau nplooj ntawv.

Kev khi: Ntau cov ntawv luam tawm tuaj yeem raug khi ua ke siv cov txheej txheem khi xws li eeb stitching, kev khi zoo meej, lossis xaim khi. Qhov no feem ntau yog siv rau cov phau ntawv, ntawv xov xwm, thiab catalogs.

Tiav kov: Ntxiv cov khoom tiav xws li laminating, embossing, ntawv nyiaj stamping, lossis varnishing tuaj yeem siv los txhim kho cov tsos thiab durability ntawm cov ntaub ntawv luam tawm.

Kev Tswj Xyuas Zoo:

Thoob plaws hauv cov txheej txheem luam ntawv offset, kev tswj xyuas zoo yog siv los xyuas kom meej tias cov ntaub ntawv luam tawm ua tau raws li qhov xav tau tshwj xeeb rau cov xim raug, sau npe, thiab luam tawm zoo. Qhov no yuav suav nrog kev tshuaj xyuas pom, ntsuas ntawm cov tsis tseem ceeb xws li dot loj thiab ntom ntom, thiab kuaj rau mem kua adhesion thiab ruaj khov.