Rau cov ntaub ntawv luam tawm zoo, cov xim feem ntau muaj cov qauv ntsuas qhov ruaj khov: cov xim number case ntawm ib pawg ntawm cov khoom yuav tsum zoo ib yam nyob rau hauv pem hauv ntej thiab nraub qaum, ci xim, thiab ua raws li tus number case xim thiab xim xim ntawm cov qauv ntawv. .
Txawm li cas los xij, nyob rau hauv cov txheej txheem ntawm kev luam ntawv thiab khaws cia, lub xim, lightness thiab saturation ntawm cov ntawv luam tawm feem ntau hloov. Txawm hais tias nws yog tus cwj mem monochrome lossis tus cwj mem nrog ntau dua ob xim, cov xim yuav dhau los ua tsaus lossis sib dua nyob rau hauv cov teebmeem sab hauv thiab sab nraud.
Raws li qhov xwm txheej no, peb yuav tham nrog koj hnub no txog yam uas cuam tshuam rau kev hloov xim ntawm cov ntaub ntawv luam tawm, uas feem ntau suav nrog cov hauv qab no:
Discoloration thiab fading ntawm number case vim lub teeb intolerance
Nyob rau hauv tshav ntuj, xim thiab brightness ntawm tus number case yuav hloov nyob rau hauv txawv degrees. Tsis muaj tus cwj mem uas yog lub teeb resistant kiag li yam tsis hloov xim. Nyob rau hauv tshav ntuj muaj zog, cov xim ntawm tag nrho cov inks yuav hloov nyob rau hauv txawv degrees. Qhov kev hloov no tuaj yeem muab faib ua ob hom.
Fading:
Nyob rau hauv qhov kev txiav txim ntawm lub hnub ci ultraviolet lub teeb, tus number case muaj lub teeb tsis zoo, poob nws cov xim ci qub, thiab xim yuav daj ntseg mus rau grey dawb. Hauv particular, cov xim daj thiab xim liab ploj sai dua hauv cov xim xim xim thiab plaub xim overprinting, thaum cyan thiab number case ploj zuj zus qeeb dua.
Discoloration:
Contrary to the fading of the black number of printed matter, xim hloov heev nyob rau hauv cov nyhuv ntawm tshav ntuj, thiab xim kuj hloov. Tib neeg hu qhov kev hloov pauv hloov pauv.
Cov nyhuv ntawm emulsification
Lub offset luam ntawv phaj tsis tuaj yeem sib cais los ntawm ntub ib feem ntawm lub phaj nrog cov tshuaj ntub dej. Rau kev luam ntawv offset, dej yog siv ua ntej thiab tom qab ntawd siv number case. Emulsification yog inevitable thaum siv dej.
Cov xim ntawm tus number case yuav raug txo tom qab emulsification, tab sis nws yuav rov qab nws cov xim qub tom qab cov dej evaporates. Yog li ntawd, qhov loj dua cov dej, qhov ntau dua qhov emulsification npaum li cas yuav ua rau discoloration. Hauv particular, cov xim inks nrog cov emulsions sib txawv kiag li sib xyaw ua ke, thiab qhov tshwm sim ntawm discoloration yog qhov tshwj xeeb tshaj plaws.
Xwm ntawm daim ntawv
1.Ntoo smoothness ntawm daim ntawv
Lub smoothness ntawm daim ntawv nto yog ze ze rau cov ntawv luam tawm. Cov ntawv tsis sib xws feem ntau xav tau ntau dua los ua kom tus number case muaj kev sib cuag zoo nrog nws. Piv txwv li, yog hais tias tus number case viscosity, fluidity thiab number case txheej thickness yog khaws cia ntawm ib tug npaum li cas, nce lub siab feem ntau yuav ua rau kom qhov chaw ntawm luam ntawv. Nyob rau tib lub sijhawm, qhov qis concave ntawm daim ntawv tseem nyob rau hauv kev sib cuag tsis zoo. Piv txwv li, yog tias cov teebmeem luam ntawv ntawm cov ntawv coated thiab cov ntawv xov xwm ntawm tib lub phaj luam ntawv sib txawv heev, qhov sib txawv ntawm qhov sib txawv tuaj yeem sib piv kom meej.
2. Kev nqus ntawm daim ntawv
Lub absorbability ntawm daim ntawv kuj ncaj qha ntsig txog cov nyhuv replication. Feem ntau, thaum luam ntawv xoob ntawv, yog tias tus number case muaj fluidity siab thiab qis viscosity, daim ntawv yuav nqus tau ntau tus number case txheej txuas. Yog hais tias txoj kab uas hla ntawm lub pores loj dua lub cheeb ntawm cov pigment particles, txawm lub pigment yuav absorbed, uas yuav txo tau lub saturation ntawm lub tswv yim. Lub thickness ntawm tus number case yuav tsum tau nce kom zoo.
Txawm li cas los xij, nce lub thickness ntawm tus number case txheej yuav ua rau "kis" thaum lub sij hawm imprinting, uas yuav cuam tshuam rau cov kev xav ntawm daim ntawv. Cov ntawv uas muaj qhov nqus tsawg tuaj yeem ua rau feem ntau ntawm cov yeeb yaj kiab number case tshwm rau ntawm daim ntawv, yog li cov ntawv luam ntawv txheej tau zoo dua saturation.
3.Permeability ntawm daim ntawv
Lub siab permeability ntawm daim ntawv yuav txo qhov tuab ntawm number case txheej, thiab cov pores loj ntawm daim ntawv saum npoo kuj yuav ua rau qee cov xim xim permeate rau hauv daim ntawv tib lub sijhawm, yog li cov xim yuav muaj kev nkag siab ntawm fading. Vim li no, siv daim ntawv nrog ntxhib saum npoo thiab xoob kev ntxhib los mos, thiab daim ntawv nrog cov number case loj fluidity, them sai sai rau kev hloov xim.
Thaum tshav kub kub tsis kam ntawm pigment
Nyob rau hauv cov txheej txheem ziab ntawm tus number case, ci thiab ceev kom qhuav adhesive printing number case yog oxidized conjunctiva ziab. Muaj ib theem fixation ua ntej ziab ntawm offset printing number case. Lub oxidation polymerization ntawm tus number case yog ib qho tshuaj tiv thaiv exothermic. Yog tias ziab sai heev, cua sov ntau yuav raug tso tawm. Yog tias cov cua sov tawm maj mam, cov xim uas tiv thaiv tshav kub yuav hloov xim.
Piv txwv li, tus number case golden darkens thiab poob nws thawj luster.
Thaum luam ntawv, cov nplooj ntawv tau muab tso rau hauv pawg ntawm lub rooj txais ntawv. Vim yog stacking ntau dhau, daim ntawv number case nyob rau hauv nruab nrab yog oxidized, polymerized thiab exothermic, thiab tshav kub tsis yooj yim rau dissipate. Yog tias qhov kub thiab txias dhau, qhov nruab nrab yuav hloov xim ntau dua.
Cov nyhuv ntawm cov roj qhuav
Lub teeb xim inks yog cov xim txias, lub teeb daj, emerald ntsuab, lub pas dej xiav thiab lwm yam xim nruab nrab inks, tsis txhob siv cov roj qhuav qhuav, vim cov roj qhuav qhuav nws tus kheej muaj qhov sib sib zog nqus magenta, uas yuav cuam tshuam cov xim ntawm lub teeb xim inks.
Cov roj qhuav qhuav zoo nkaus li dawb, tab sis nws tig xim av tom qab lub conjunctiva yog oxidized. Yog tias cov roj qhuav qhuav yog loj, cov ntawv luam tawm qhuav tuaj yeem yog xim daj xim av, thaum cov xim ntawm cov roj qhuav qhuav rau cov xim dub xws li xiav, dub thiab ntshav yuav tsis cuam tshuam zoo heev.
Kev cuam tshuam ntawm alkali tsis kam ntawm luam ntawv number case
Tus nqi pH ntawm cov ntawv luam tawm yog 7, thiab cov ntawv nruab nrab yog qhov zoo tshaj plaws. Feem ntau, tus number case ua los ntawm inorganic pigments kuj tsis zoo nyob rau hauv acid thiab alkali tsis kam, thaum cov organic pigments kuj zoo nyob rau hauv acid thiab alkali tsis kam. Tshwj xeeb, nruab nrab xiav thiab tsaus xiav number case yuav ploj mus thaum ntsib alkali.
Nyob rau hauv cov ntaub ntawv ntawm alkali, nruab nrab daj xim yuav tig mus rau liab, thiab kub stamping anodized aluminium ntawv ci thiab luam ntawv kub yuav tig mus rau thaum ub daj thaum ntsib alkaline tshuaj, tsis muaj luster. Cov ntawv feem ntau tsis muaj zog thiab alkaline, thiab cov binder uas muaj alkaline tau ntsib nyob rau tom qab theem ntawm luam ntawv thiab khi. Yog tias cov khoom ntim thiab kho kom zoo nkauj luam ntawv yog ntim cov khoom alkaline, xws li xab npum, xab npum, xab npum ntxhua khaub ncaws, thiab lwm yam, yuav tsum tau txiav txim siab txog qhov alkali tsis kam thiab saponification tsis kam ntawm tus number case.
Kev cuam tshuam ntawm qhov chaw cia khoom
Muaj ob peb lub laj thawj vim li cas cov khoom luam tawm feem ntau yuav dhau los ua yellowish thaum lawv khaws cia ntev.
Cov fibers nyob rau hauv daim ntawv muaj ntau lignin thiab discolor. Piv txwv li, cov ntawv xov xwm luam tawm ntawm cov ntawv xov xwm feem ntau yuav tig daj thiab nkig.
Feem ntau ntawm cov xim luam ntawv cov khoom luam tawm los ntawm offset plaub xim dot printing yog discolored los yog faded vim lub teeb tsis zoo thiab kub tsis kam ntawm cov xim nyob rau hauv lub hnub, ntev hnub, cua thiab nag, sab nraum zoov kub corrosion, thiab lwm yam.
Tus cwj mem Hongze xaiv tsis yog tsuas yog superior, tab sis kuj ua rau tus cwj pwm nruj thaum muab piv cov xim ntawm cov khoom tiav nyob rau theem tom ntej. Tsuas yog muab cov khoom rau peb, thiab peb yuav xyuas txhua kauj ruam uas yuav tsum tau ua rau koj.
Yog xav paub ntxiv, thov hu rau peb:
Post lub sij hawm: Oct-21-2022
