Dab tsi yog cov ntsiab lus ntawm tus txheej txheem uas yuav tsum tau txawj ua nyob rau hauv offset printing?
Peb yog ib lub tuam txhab luam ntawv loj hauv Shenzhen Tuam Tshoj. Peb muaj cov phau ntawv luam tawm, phau ntawv xov xwm luam ntawv, 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.
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Vim yog lub cev thiab cov tshuaj sib txuas ntawm kev lag luam luam tawm, muaj cov txheej txheem siab kom txawj siv tus txheej txheem thiab tshuab. Vim yog cov teeb meem ntawm txoj haujlwm thiab cov theem haujlwm ntawm cov neeg ua haujlwm thiab cov neeg tsav tsheb, qhov offset tsis ua haujlwm ntxiv.
01. Cov yam ntxwv tawm
Offset luam ntawv yog ua raws li txoj cai ntawm cov roj thiab cov dej tawm, hauv tib lub phaj. Cov duab nraaj yog lipophilic thiab hydrophobic, thiab qhov dawb paug yog hydrophilic thiab oleophobic. Qhov no yog qhov sib txawv tshaj plaws ntawm kev lag luam luam tawm thiab lwm yam luam tawm, thiab nws tseem yog tus yuam sij rau kev siv tshuab luam ntawv.
Nyob rau hauv rooj plaub uas muaj ob tus cwj mem thiab dej nyob rau ntawm daim ntawv luam tawm, tus cwj mem xaws npuag uas thauj tus cwj mem yog nyob hauv dej. Vim muaj kev sib hloov siab ntawm tus number case rau cov menyuam, dej muab sib xyaw rau hauv tus cwj pwm hauv qhov kev txiav txim ntawm cov neeg siv dag zog yuam, ua rau lub cev emulsification thiab ib txwm luam. Ib qho tsim nyog muaj npe emulsification. Vim li no, offset printing ua tau siv cov ntsiab lus ntawm cov roj thiab dej ua kom rov qab, thiab siv cov yam ntxwv ntawm roj thiab dej kom yaj thiab emulsify.
Raws li cov ntaub ntawv txawv teb chaws, thaum offset luam ntawv feem ntau tsis yog luam tawm, tsim nyog tus nqi emulsification ntawm tus cwj pwm, dej nyiaj txog li 20 mus rau 25%. Tsis muaj kev ntsuas ntsuas hauv Suav teb, uas yog txiav txim los ntawm tus tswj hwm cov tshuab thiab kev ua haujlwm. Qhov no muaj xws li tsis ruaj tsis khov. , uas ua rau kom tsis ua hauj lwm.
Cov dej siv hauv offset luam tawm tsis yog dej ntshiab. Lub PVA version muaj phosphorus thiab chromic acid hauv dej, uas yog corrosive rau qhov layout. Nws tsis tsuas corrodes qhov dawb ntawm ib seem ntawm qhov seem ntawm qhov layout, tab sis kuj tseem niaj hnub ntsaws cov ntsev txheej ntawm lub tshuab thaum corroding cov nraaj feem. Cov xim pleev xim yuav ua rau cov ntawv npluas luam ntawm cov ntawv luam tawm. Cov kua nplaum ntxiv rau PS version muaj ntau tshaj kaum lub tshuab. Nws yog ib tus neeg ntxhib me me acidic nrog rau kev ua kom huv thiab yog tsis tshua muaj corrosive rau lub phaj luam ntawv.
02. Kev luam tawm siab
Kev luam tawm kuj yog ib lub hauv paus ntawm txoj kev siv tshuab. Vim hais tias cov offset luam ntawv yog indirect luam ntawv, daim duab yog kis ntawm lub phaj lub tog raj kheej mus rau daim pam rau thawj imprinting. Tom qab daim pam daim plhaub tau txais tus cwj mem, qhov luam no yog xa mus rau hauv substrate. Qhov no yog qhov thib ob kev luam tawm thiab ob lub siab. Lub siab xav tau luam tawm yog txawv. Yuav ua li cas ua tau "lub siab nyob ntawm thaj tsam" ntawm lub cheeb tsam, peb yuav tsum ua kom muaj zog.
Feem ntau, qhov siab ntawm qhov offset printing xovxwm thiab lub phom lub tog raj kheej thiab pam lub tog raj kheej yog li 0.10 hli; lub siab ntawm pam lub tog raj kheej thiab lub tswv yim kheej kheej yog li 0.20 mus rau 0.25 hli. Nrog kev siv ib daim zoo nkauj zoo dua qub PS daim nplaum thiab cov thawv cua tuaj txawv teb chaws, lub siab ntawm lub phom lub tog raj kheej thiab pam lub tog raj kheej yuav me me. Piv txwv, qhov Heidelberg 4 xim tshuab tuaj yeem luam tawm ntawm 0.05 hli.
Lub siab siv rau hauv offset luam ntawv yog tiav los ntawm kev ntsuas lub voos kheej ntawm lub nruas, ntsuas qhov nruab nrab qhov chaw, ntsuas thiab nce lossis tsawg cov lej. Qhov kev ua kom siab yuav tsum yog tus qauv thiab tswj los ntawm cov ntaub ntawv. Daim kab thaiv yuav tsis pub ntxiv rau qhov kom tsis ncaj, lub siab yuav muaj zog dig muag, thiab lub siab yuav maj mam hloov. Cov kab ntawm cov menyuam qhov quav yuav txawv, qhov kev sib txhuam ntawm qhov sib cuag yuav loj tuaj, thiab txawm roj, ghosting thiab number case yuav tshwm. Lwm cov faults xws li cov pas tuav.
Yog li, qhov tseeb siv thiab kev hloov ntawm kev luam ntawv yog ib qho tseem ceeb ntawm txoj kev siv tshuab uas yuav tsum luam tawm cov khoom.
03. Txaus siab rau
Kev txhawb siab tsis pub kom raug cais rau hauv kev ntsug overprinting thiab kab rov tav overprinting. Muaj ib qho lus hais tias "daim ntawv no yeej tswj tau los ntawm cov khoom nruab nrog cev thaum lub sijhawm kev sib kis, thiab qhov kev tiv thaiv yuav tsum tau lav." Qhov tseeb, kab lus no tsis yog txhua yam.
Piv txwv, lub pob tw los yog khoov pob khaus yog khov heev, tab sis nws yuav tswj tau thaum muab hloov ntawv, tab sis nws tsis tuaj yeem tswj tau. Qhov no zoo li ib tug neeg tuav lub pob hauv ob txhais tes, ob txhais caj pas tuaj yeem ncav ncaj ncaj, thiab ob txhais caj pas tuaj yeem nyom, tab sis cov khoom sib tw ua ob txoj haujlwm sib txawv txawv ntawm qhov kev ncua thiab kev ruaj ntseg ntawm tib neeg lub cev. . Yog li ntawd, nws yuav tsum tau hais tias "qhov tseeb yog nyob rau hauv qhov chaw kom muaj tseeb overprinting."
Muaj ntau ntau yam ua rau tsis muaj tseeb tshaj qhov tsis txaus. Cov khoom sib xws yog: kev ncab ntawv, daim ntawv pub, qhov chaw tsis muaj tseeb, tsis txaus siv quab yuam, hnav cov khoom qia, kev tsis txaus siab, thiab hnav cov kis hniav sib kis.
Tsis tas li ntawd, qee qhov tshwj xeeb tej zaum kuj yuav ua rau tsis muaj teeb meem. Piv txwv li, yog tias cov roj hmab teeb tsa yog deformed, daim duab tej zaum yuav yog ib qho overprinted; qhov hloov ntaub ntawv thiab lub tswv yim khawm lub tswv yim yuav raug xaum qis, uas yuav ua rau ua rau dhau ib txheej overprinting. .
04. Xam Xaj Xaj
Hauv yav dhau los, cov xim ntawm cov tshuab monochrome yog xim daj, xim liab, xiav, thiab kua cwj mem. Cov xim ntawm no yog xim kab ke. Cov teeb meem nyuab nyuab heev yog kos npe rau daj thiab xim liab, tshwj xeeb yog thawj xim. Tsab, muaj feem xyuam rau cov xim kev luam thiab kev luam ntawm cov teeb meem luam tawm.
Yog cov ntawv daj tuaj dhau lawm, cov xim ntawm tus neeg luam ntawv tsis paub txog kev loj hlob zoo li cas, thiab lub tsev laus laus li qub lub tuam tsev qub, uas ua rau nyuaj rau txais; Yog tias daim ntawv daj tuaj yeem dhau heev, daim duab yees yog qhuav thiab xim yog xim rau xiav-violet. Kuj tsis zoo-nrhiav.
Muaj ob lub ntsiab lus tseem ceeb rau kev daj daj daj daj cua dub: ib qho yog retinal colour-solving hlwb ntawm tib neeg qhov muag, uas muaj qhov kev daws teeb meem qis tshaj plaws rau daj; lwm qhov yog tias tib neeg tsis nkag siab txog cov roj ntawm daim ntawv, tsis muaj kev ntsuas cov cuab yeej, thiab tib qho loj. Nws feem ntau ua rau tob heev thiab tsis muaj zog.
Cov xim txheej txheem ntawm ob-xim tshuab tuaj yeem ua rau lub phaj daj thiab xiav phaj hauv tib lub luam ntawv, thiab xiav phaj tsuas yog plays lub luag hauj lwm ntawm xiav iav xim lim, uas yog qhov yooj yim kom paub seb qhov thickness ntawm daj phaj number case txheej yog tsim. Txawm li cas los xij, vim lub tshuab luam ntawv-txheej, cov tshuab ob-xim feem ntau ua cov duab A thiab B dab neeg rau ob lub kaum ntawm lub thawb. Qhov no yuav tsum tau hais tias cov xim sib lawv liag tau pauv hloov thaum txheej txheem kho.
Muaj ntau xim plaub tshuab luam ntawv nrog ntau tshaj plaub xim, vim peb xim muaj ntub thiab ntub luam tawm, xim sib lawv liag raws li cov viscosity ntawm txhua cov xim cuav los ntawm siab mus qis, txwv tsis pub lub overprinting tsis ua hauj lwm, thiab tsaus xim ntawm tus number case yuav tshwm. Qee lub sij hawm thawj ob peb xim yuav tsim tau A thiab B ghosts, thiab cov xim raws caij nyoog yuav tsum tau kho raws li qhov tsim nyog.