Hais txog kev siv cov ntaub ntawv luam tawm thiab tsis
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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Ua ntej, cov kev tsis ntawm kev daws teeb meem thiab nws txoj kev paub
1. tus nqi pH
Cov tshuaj pH ntawm dampening tshuaj yuav tsis raug ignored, thiab tus nqi pH siab dhau los lossis tsawg, uas yuav cuam tshuam txog luam ntawv. Thaum lub txiaj ntsig pH siab dhau, qhov nro ntawm qhov chaw txhuam ntawm qhov chaw yog qhov qis, thiab oleophilic txheej ntawm lub phaj yog puas lawm, xwv li tias tus number case yog loj emulsified, thiab tus number case yog unbalanced: tus nqi pH tsawg dhau, uas cuam tshuam qhov oxidative drying ceev ntawm tus number case. Thiab cov phom corrosive puag, txo cov txheej txheem ntawm cov ntawv luam ntawm cov ntawv luam. Nws yog feem ntau ntseeg tias tus nqi pH feem ntau tsim nyog ntawm Ps version yuav tsum muab khaws cia ntawm 4.8 mus rau 5.3, thaum lub sij hawm tus lej feem ntau yog tswj tau yooj yim thiab cov luam ntawv zoo zoo. Kev sim yooj yim ntawm pH ntawm dampening tshuaj nyob rau hauv lub luam ntawv yuav ua tau nrog ib tus cwj mem pH. Qhov tseeb yog av 0.1, thiab lub taub ntsuas yog rinsed nrog dej ua ntej ntsuas. Kev kho tsis ncav (pH 7.0) tau ua tiav. Cov tshuaj tsis haum yuav tsum tau tawm ntawm lub dab dej thaum ntsuas thiab ntsuas tom qab sawv. Tus ntsuas nyeem tus naj npawb tom qab nws ruaj khov.
2. Kev coj cwj pwm
Feem ntau, qhov kev tswj qhov tsis zoo ntawm cov offset luam ntawv tuaj yeem tau ntxiv los yog txo cov dampening tov raws li lub preset conductivity los tswj cov nyiaj dampening kua. yog li ntawd. Txawm tias qhov kev coj tus nqi tseem ceeb yog qhov tsim nyog lossis tsis ua. Nws ncaj qha rau cov teeb meem dampening ntxiv hauv cov ntawv luam tawm yog tsim nyog. Nyeg, nws cuam tshuam txog kev tshuav nyiaj li cas thiab luam kom zoo. Hom sib txawv ntawm dampening kua muaj ntau qhov sib txawv thiab lawv cov hluav taws xob sib txawv nyias txawv nyias. Tsis tas li ntawd, cov kab lus no kuj raug cuam tshuam los ntawm cov dej zoo thiab kub, yog li qhov chaw ntawm kev sib txuas lus ntawm dampening daws yuav tsum tau txiav txim siab raws li qhov tseeb ntawm ntau hom npe thiab dej hauv zos. Kev kuaj ntawm qhov kev ntsuam xyuas dampening kev ntsuas tau ntsuas tau siv ib hom ntsuas tus cwj mem, uas tseem raug ntxuav thiab ntsuas nrog dej ua ntej kev sim. Nws yuav tsum raug sau tseg tias tus nqi ua tus coj yog qhov tseem ceeb ntawm qhov tshuaj tiv thaiv dampening kua concentration, thiab tus nqi ntsuas los ntawm qhov kev ntsuas tus cwj pwm muaj peev xwm tsis ncaj qha txiav txim siab tias qhov concentration ntawm dampening solution yog tsim nyog.
3. Cawv (isopropanol) concentration
Nws yog txoj kev cai hauv kev lag luam los siv cov isopropyl cawv uas muaj cov ciav dej los ua kua cawv ciav dej. Dej cawv ua raws li tus neeg ntxhib ntxhib, uas ua rau kom muaj dej khov ntawm qhov chaw txhuam dej thaum uas txo cov nro ntawm dej. Tus nqi ntawm cov tshuaj tsis haum haus cawv tuaj yeem ncav cuag li ntawm 15%. Txawm li cas los, isopropyl cawv tsis yog environmentally friendly thiab kuj kim heev. Ntau qhov chaw txhuab dej tshiab tau muaj ib tus neeg ntxhib ntxi, uas tuaj yeem txo qhov nyiaj isopropyl cawv. Qhov kev sim rau kev haus cawv muaj peev xwm ua tau los siv lub tshuab ntsuas dej. Lub koom haum German FOGRA siv lub densitometer los ntsuas cov dampening kua thaum lub dampening kua tshuaj, thiab tom qab ntawd mam txiav txim siab txog cov cawv qaub ncaug raws li qhov sib txuam sib luag. Txoj kev no yog qhov pom zoo los ntawm cov luam ntawv thiab cov lag luam.
4. Ntaiv Nto
Ib qho tshuaj zoo dampening yog yuav tsum tau kis mus rau hauv seem dawb ntawm cov ntawv xov xwm thiab muaj kev sib tw zoo. Qhov nro ntawm nrawm ntawm qhov chaw mos muaj me me. Nws txoj kev sib kis ntawm cov phaj yog qhov zoo dua. 1. Txoj kev ntxhib los ntsuas tus nro ntawm qhov kev daws teeb meem yog siv lub tshuaj dampening mus rau seem ntawm lub phaj. Siv lub iav tsom kom pom kev sib kis ntawm dampening kua rau ntawm lub phaj. Yog hais tias qhov tshuaj tsis haum tsis kis tawm mus rau qhov chaw, qhov nro ntawm qhov dampening tov yog siab dhau heev lawm: Yog hais tias qhov tshuaj tsis haum dampening ceev nrooj kis mus rau qhov chaw. Qhov no qhia tau hais tias lub dampening daws tau zoo wetting cov khoom nyob rau hauv daim txiag phaj.
5. Qhov peev xwm tau
Cov tshuaj tsis haum yog ib qho tsis tov, uas txhais tau hais tias muab cov kua qaub qis los sis alkali rau dampening tov. Los yog dilute cov kua dampening. Lub pH ntawm dampening kua tseem tshua unchanged. Txij li ntawm qhov chaw tov ntawm qhov chaw yuav tsum tswj kom muaj pH ruaj khov, pH tsis tuaj yeem muab ntxiv rau cov ciav dej. Nws kuj yog vim hais tias qhov kev daws teeb meem muaj qhov peev xwm uas nws pH tsis pom nws cov concentration. Titrating method yuav raug siv los ntxiv rau qhov ntsuas rau txoj kev dampening, thiab qhov peev txheej ntawm dampening kua yuav ntsuas tau los ntawm tus nqi ntawm cov kua dej thaum lub qhov khib nyiab lawm.
6. qhov kub thiab txias
Qhov ntsuas kub ntawm cov ciav dej yog qhov tseem ceeb tshaj uas cuam tshuam rau qhov nyiaj tshuav ntawm tus number case. Qhov sib txawv ntawm kev kub ntxhov dampening nyob rau tib lub caij luam ntawv. Lub leb tshuav nyiaj ntau yog txawv. Nce qhov ntsuas ntawm qhov kev txhim kho ntawm qhov chaw txhuam yuav ua rau kom muaj lub xaj kua mem tes, thiab lwm yam. Raws li qhov kub nce, qhov nyiaj ntawm dampening daws yuav ntxiv. Lub ntsuas kub nyob rau hauv lub luam ntawv yuav ua rau muaj kev hloov hauv qhov kub ntawm qhov cov ciav dej. Yog li, qhov kev cob qhia yuav tsum them nyiaj rau cov kev hloov hauv chav tsev. Nyob rau hauv lub caij ntuj sov. Tej lub lag luam luam tau txo qhov kub ntawm qhov chaw txhuam cov dej los ntawm kev ntxiv dej khov nab kuab rau dej thau kom tsis txhob muaj ntau hom emulsification ntawm tus number case. Qhov ntsuas kub muaj peev xwm ua tau los siv tus pas ntsuas kub.
Qhov thib ob, kev siv dampening daws
1, kev xaiv dampening kua
Vim hais tias lub luag hauj lwm ntawm dampening daws nyob rau hauv lithographic offset luam ntawv tseem ceeb heev. Yog li, yuav ua li cas xaiv txoj cai dampening daws yog qhov tseem ceeb. Muaj ntau hom tshuaj dampening nyob rau hauv kev ua lag luam, uas muab faib tau rau cawv dampening kua (cawv-muaj dampening kua), tsis muaj cawv dampening kua (dog dig dampening kua) thiab surfactant dampening kua. Raws li qhov tau txais daim ntawv thov, nws tuaj yeem muab faib ua cov ntawv ciav rau cov tshuab luam ntawv high-speed teb offset luam ntawv, dampening kua rau kev lag luam high-speed teb offset tshuab luam ntawv thiab dampening tov rau ib cov ntawv-ntawv lithographic offset luam ntawv. Rau lub tuam txhab luam ntawv, los ntawm cov tswv yim ntawm kev saib xyuas nrog nrog lub zeem muag khoom ntawm qhov chaw lag luam los xaiv qhov chaw kho kom zoo tshaj plaws.
2. Kev pab daws kev daws teeb meem
Txoj kev tiv thaiv dav dav ntawm qhov nyiaj dampening kua yog txo cov nyiaj dampening kua siv nyob rau hauv qhov chaw uas lub luam ntawv phom tsis yog lo av. Qhov nyiaj dampening tshuaj siv sib txawv nyob rau hauv txawv printing conditions. Feem ntau ntawm cov hauv qab no:
(1) daim ntawv ntawv muaj cov ntsiab lus dej thiab muaj tsawg tus dampening kua; conversely, daim ntawv muaj cov ntsiab lus tsis tshua muaj dej. Tus nqi ntawm dampening daws yog loj. Ib txhij. Thaum lub zog ntawm daim ntawv qis qis, qhov tsim nyog nce ntxiv ntawm cov tshuaj tsis haum yuav txo tau qhov teeb meem ntawm qhov dej kub los ntawm daim ntawv poob thiab plaub hau poob.
(2) Ink Rau tus number case uas nyuaj rau emulsify, nws yog ib qho tsim nyog kom tsim nyog kom nce qhov concentration ntawm qhov ciav kua.
(3) daim hlau: CTP version thiab PS version muaj sib txawv ntawm cov khoom. Lub CTP version yuav tsum tau ib daim duab xim tso xim dua. Tsis tas li ntawd. Qhov muaj zog lub adsorption ntawm ib qho dawb paug ntawm cov phaj luam tawm hauv dej zaj duab xis, ntau cov tshuaj tov uas tsim nyog.
(4) Cov ntawv luam tawm: Cov nyiaj dampening uas siv thaum luam ntawv hauv av pom tseeb tshaj li qhov uas luam tawm cov ntawv thiab cov qauv teeb.
(5) Kev ceev ceev: Qhov nyiaj dampening kua nce ntxiv raws li cov luam ntawv nce siab.
(6) Kev Kub Lub Cev Kub: Qhov kub siab tshaj ambient, qhov ntau dua qhov nyiaj dampening kua.