Yuav Ua Li Cas Txiav Txim Xim Xim ntawm Flexographic Printing? Cov teeb meem xav txog thaum txiav txim siab xim ib ntus hauv Flexographic Printing
Printing colour sequence hais txog qhov kev txiav txim uas muaj ntau yam xim daim hlau luam tawm hauv ntau xim luam ntawv. Cov xim luam ntawv sib txawv ua rau muaj xim sib txawv.
Hauv cov xim luam ntawv nrog cov phaj hloov tau, feem ntau siv plaub-xim daim hlau yog daj (Y), magenta (M), cyan (C), thiab dub (K). Cov no yog overlayed nyob rau hauv ib qho kev txiav txim. Hauv txoj kev xav, muaj 24 xim sib txawv rau plaub-xim luam ntawv, tab sis nyob rau hauv kev xyaum, cov xim sib lawv liag cuam tshuam cov xim luam tawm ntawm cov luam ntawv. Cov xim tsim nyog tuaj yeem ua rau cov xim ntawm cov ntawv luam ze rau qhov qub, txawm tias ua kom cov huab cua ntawm qee cov xim, kho cov tonal theem, thiab pab txhawb kev ntxiab. Yog li ntawd, hauv cov xim luam ntawv, tshwj xeeb tshaj yog nyob rau hauv ntim thiab cov xwm txheej uas muaj ntau tshaj plaub xim lossis xim xim, yuav tsum tau them nyiaj rau kev npaj cov xim sib lawv liag.
Thaum txiav txim siab cov xim sib lawv liag, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias cov xim sib lawv liag hauv flexographic luam ntawv feem ntau zoo ib yam li hauv letterpress printing, tab sis nws yuav tsum tsis txhob txais cov xim sib lawv liag siv hauv offset printing. Rau cov luam ntawv thawj ntawm plaub-xim hlau thav duab version, cov xim sib lawv liag yog feem ntau txheeb xyuas raws li cov xim ntawm cov qauv, feem ntau yog siv cov xim daj, magenta, cyan, dub. Qee tus tuaj yeem xaiv qhov sib lawv liag daj, dub, magenta, cyan. Qhov no yog vim tias dej-based inks muaj qhov siab ntom ntom ntom ntom, muaj kev pov hwm muaj zog, tuab mem kua, ci xim, tab sis qis transparency. Cov xim sib lawv liag rau plaub-xim hlau ncej version yuav tsum tsis txhob hloov arbitrarily.
Cov xim sib lawv liag hauv flexographic luam ntawv yog qhov sib txawv, cuam tshuam los ntawm ntau yam, tshwj xeeb tshaj yog rau ntau xim hlau thav duab versions. Kev txiav txim siab ntawm cov xim sib lawv liag yuav tsum ua tib zoo xav txog ntau yam raws li cov xwm txheej tshwj xeeb thiab cov kev cai zoo ntawm cov ntawv luam tawm. Feem ntau, thaum txiav txim siab xim ib ntus, kev saib xyuas yuav tsum tau tsom mus rau cov hauv qab no:
Xim Reproduction thiab Printing Suitability:Cov xim sib lawv liag cuam tshuam rau xim xim. Thaum luam thawj xim, tsuas muaj ib qho ua tau: cov txheej number case yog luam tawm ncaj qha rau ntawm lub substrate nto, uas ua rau cov xim ruaj khov. Thaum luam tawm cov xim thib ob, muaj ob txoj hauv kev: qee cov dots tau xa ncaj qha mus rau lub substrate nto, los yog qee cov dots tau luam tawm ntawm cov dots ntawm thawj xim (piv txwv li, ntxiab). Ob qhov xwm txheej no ua rau muaj kev hloov pauv ntawm cov xim luam tawm. Thaum luam ntawv thib peb xim, muaj peb txoj hauv kev, thiab lwm yam. Lub pob tshab ntawm tus number case kuj plays lub luag hauj lwm nyob rau hauv lub printing haum.
Xim Rendering Principles ntawm daim duab:Nyob rau hauv cov cheeb tsam uas muaj suab nrov nyob rau hauv cov luam ntawv, dot kev npaj yog feem ntau nyob rau hauv parallel, thiab cov xim sib lawv liag muaj me ntsis cuam tshuam rau cov xim sib tov nyob rau hauv high-tone cheeb tsam. Txawm li cas los xij, thaum koj hloov los ntawm cov tones siab mus rau nruab nrab-tones thiab tom qab ntawd mus rau tsaus tones, cov xim sib lawv liag ntawm cov xim sawv cev nce.
Ink Transparency:Inks muaj qee qhov kev pab them nqi, thiab thaum luam ib xim dhau ib qho, nws cuam tshuam rau xim rendering. Zoo pob tshab hauv inks tso cai rau lub teeb xim ntawm cov number case qis kom dhau los ntawm cov xim xim sab sauv (subtractive mixing), qhia cov xim tshiab. Cov inks sib txawv muaj ntau theem ntawm pob tshab, txawm tias thaum luam ntawv nrog cov xim sib txawv ntawm tib xim phaj, ua rau muaj xim sib txawv.
Yam ntxwv ntawm daim duab:Feem ntau, nws raug nquahu kom luam lub phaj nrog cov dots tsawg dua ua ntej, tom qab ntawd los ntawm lub phaj nrog ntau cov dots. Lub ntsiab xim xim phaj ntawm daim duab tuaj yeem luam tawm kawg lossis thib ob mus rau qhov kawg. Cov neeg ua haujlwm yuav tsum xaiv cov xim sib lawv liag raws li kev soj ntsuam zoo ntawm ntau yam.
Degree ntawm qhov cuam tshuam ntawm cov xim sib lawv liag ntawm xim luam tawm:Hauv cov xim overprinting, tus nqi ntxiab feem ntau yog siv los ntsuas qhov ntsuas ntawm qhov cuam tshuam ntawm cov xim sib lawv liag ntawm cov xim luam tawm. Tus nqi ntaiv tau suav nrog [(cov khoom siv ntom ntom ntawm cov xim sib tshooj ntawm thawj thiab thib ob xim ib leeg) ÷ cov xim sib txawv ntawm cov xim thib ob ib leeg] × 100%. Cov xim sib txawv ua rau muaj qhov sib txawv ntawm qhov sib txawv thiab, yog li ntawd, cov teebmeem luam ntawv sib txawv. Rau qhov chaw xim xim luam ntawv, txoj cai dav dav yog siv cov kab ke los ntawm lub teeb mus rau qhov tsaus ntuj, uas tuaj yeem txhim kho qhov ci ntawm cov xim tsaus.
Lub hauv paus ntsiab lus dav dav rau kev txiav txim siab xim ib ntus hauv Flexographic Printing
Txij li cov xim sib lawv liag muaj feem cuam tshuam rau kev luam ntawv, yuav ua li cas cov xim sib lawv liag rau flexographic luam ntawv yuav raug txiav txim? Feem ntau, cov hauv qab no tuaj yeem ua raws li:
Npaj cov xim raws li cov ntsiab lus thiab cov yam ntxwv ntawm tus Thawj:Cov xim sib lawv liag yuav tsum tau teem caij xav txog cov ntsiab lus thiab cov yam ntxwv ntawm tus thawj. Cov neeg tsim qauv feem ntau xaiv cov xim xim thaum tsim cov layout, sawv cev rau tag nrho cov kev xav ntawm cov xim. Cov xim xim tuaj yeem ua kom sov (nrog liab, txiv kab ntxwv, daj raws li lub hauv paus) lossis txias (nrog ntsuab, xiav raws li lub hauv paus). Qhov kev npaj ntawm cov xim sib lawv liag yuav tsum xav txog lub suab nrov no.
Txiav txim seb Xim Sequence Raws li Transparency ntawm Inks:Xav txog cov pob tshab ntawm cov inks sib txawv, cov xim sib lawv liag yuav tsum tau npaj raws li qhov pom tseeb ntawm cov inks. Cov number case daj feem ntau yog pob tshab, ua raws li magenta thiab cyan, nrog dub yog qhov tsawg tshaj plaws pob tshab. Yog li ntawd, ib ntu uas luam tawm cov ntawv tsis tshua muaj pob tshab ua ntej thiab ntau pob tshab inks tom qab yuav tsum tau txiav txim siab.
Txiav txim siab xim raws li tus yam ntxwv ntawm daim duab:Xav txog cov yam ntxwv ntawm daim duab. Rau cov dluab dominated los ntawm cov cheeb tsam loj ntawm scenery (nrog lub suab txias raws li lub hauv paus), xim sib lawv liag ntawm dub, magenta, cyan, daj yuav haum. Rau cov duab uas cov cim yog qhov tseem ceeb (nrog lub suab sov), xim sib lawv liag ntawm dub, cyan, magenta, daj yuav tsim nyog.
Xav txog qhov Transparency ntawm Inks:Cov inks sib txawv muaj qhov sib txawv thiab kev pab them nqi. Thaum txiav txim siab cov xim sib lawv liag, xav txog qhov pom tseeb ntawm cov inks siv thiab npaj qhov sib lawv liag. Inks uas muaj qhov pom tseeb qis dua yuav tsum tau luam tawm ua ntej, tom qab los ntawm cov uas muaj qhov pom tseeb dua.
Xav txog qhov nyuaj ntawm Traping hauv Overprinting:Hauv flexographic luam ntawv ntawm daim ntawv, nws yog ib qho tseem ceeb kom txo tau qhov cuam tshuam ntawm kev cuam tshuam ntawm cov teeb meem. Rau ob pawg xim uas nyob ib sab, lub kaum sab xis ntawm cov kab tshuaj ntsuam yuav tsum sib txawv tsawg kawg 30 degrees, uas yuav pab tiv thaiv kev hloov xim thiab teeb meem teeb meem.
Xav txog qhov Absorbency ntawm Substrate:Thaum lub substrate muaj cov number case absorbency siab, thawj xim yuav tsum siv tus number case nrog viscosity siab. Piv txwv li, yog tias daim ntawv tsis zoo, nrog cov xim dawb thiab smoothness, siv cov xim daj raws li lub hauv paus tuaj yeem them nyiaj rau cov teeb meem no. Thaum hmo ntuj luam ntawv, vim tib neeg lub qhov muag pom kev muaj peev xwm, cov xim tsis tshua muaj teeb pom kev zoo yuav tsum tsis txhob npaj ua thawj xim.
Xav txog Xim Sequence hauv Multi-Color Presses:Nyob rau hauv ntau xim presses, lub printing haum yuav maj txo los ntawm thawj xim mus rau lub xeem xim. Yog li ntawd, cov xim tsaus nti tuaj yeem muab tso rau hauv thawj xim luam ntawv, thiab lub teeb tone daim hlau nyob rau hauv lub xeem luam ntawv.
Xav txog tus nqi ntawm Inks:Tam sim no, tus nqi ntawm cov khoom siv hauv tsev yog siab tshaj plaws rau magenta, ua raws li daj thiab cyan, nrog dub yog qhov kim tshaj plaws. Txhawm rau txo cov nqi luam ntawv thaum ua tau raws li cov kev xav tau zoo, npaj cov kab ke nrog pheej yig dua dub thiab cyan inks luam tawm ua ntej, thiab kim dua magenta thiab daj inks luam tawm tom qab.
Kev Txiav Txim Xim Xim rau Yas Zaj Duab Xis Flexographic Printing:
Kev txiav txim siab cov xim sib lawv liag hauv flexographic luam ntawv ntawm cov yas zaj duab xis yog ib qho txheej txheem tseem ceeb. Vim qhov sib txawv ntawm cov inks siv rau saum npoo thiab thim rov qab luam ntawv ntawm cov yas zaj duab xis, nrog rau kev hloov pauv ntawm cov txheej txheem luam ntawv, kev txiav txim siab xim sib txawv kuj txawv. Qhov sib txawv tseem ceeb hauv kev muaj pes tsawg leeg thiab kev ua haujlwm ntawm qhov chaw luam ntawv (nto number case) thiab thim rov qab luam ntawv (sab hauv number case) yog raws li hauv qab no:
Binder Qhov txawv:Lub binder rau tus number case yog feem ntau polyamide resin, uas muaj adhesion zoo thiab gloss tab sis tsis haum rau high-temperature tej yam kev mob thiab muaj kev sib raug zoo tsis zoo thaum laminated. Lub binder rau tsis ua noj rov qab luam number case yog tsuas yog chlorinated polypropylene, thiab nyob rau hauv txawv teb chaws, nitrocellulose thiab vinyl chloride-vinyl acetate copolymer resin kuj siv. Rau siab-kub-resistant rov qab luam ntawv number case, lub binder yog polyurethane, thiab ib co ntawm cov hardener yog ntxiv thaum siv rau kev sib txuas sib txuas.
Solvent Selection Differences:Surface number case tsuas yog siv cov kuab tshuaj xws li xylene thiab isopropanol. Feem ntau, cov kuab tshuaj rau rov qab luam ntawv number case feem ntau yog toluene thiab ethyl acetate. Rau siab-kub-resistant rov qab luam ntawv number case, cov kuab tshuaj xws li acetone thiab ethyl acetate yog siv. Cov kuab tshuaj rau rov qab luam ntawv number case yog tsim rau high-speed printing, nrog ceev volatility thiab tsawg residual solvents.
Abrasion Resistance Qhov txawv:Polyamide resin nyob rau hauv tus number case deg yog hloov tau thiab muaj elasticity zoo, thiab cov additives yog ntxiv los txhim kho kev puas tsuaj. Chlorinated polypropylene resin nyob rau hauv rov qab luam ntawv number case yog nruj thiab muaj zog abrasion tsis kam. Txawm li cas los xij, vim kev luam ntawv rov qab tsis tas yuav muaj kev puas tsuaj siab, qhov kev xav tau qis dua.
Auxiliary Material Sib txawv:Vim qhov sib txawv ntawm cov ntawv khi, cov ntaub ntawv pabcuam, thiab cov khoom siv ntxiv rau cov number case nto thiab rov qab luam ntawv number case kuj txawv. Surface number case feem ntau suav nrog desiccant acrylate ester, kiwi txiv hmab txiv ntoo acid ester los txhim kho adhesion, gloss, thiab viscosity. Reverse printing number case muaj xws li ntau yam dispersants, enhancers, defoamers, thiab lwm yam additives.
Cov txheej txheem luam ntawv sib txawv:Thaum lub phaj ua cov txheej txheem rov qab luam ntawv yog zoo ib yam rau kev ua phaj dav dav, cov duab ntawm lub phaj yog thim rov qab piv rau saum npoo luam ntawv. Deg number case muaj qhov ziab kom qeeb qeeb dua li tus number case rov qab.
Xav txog qhov sib txawv ntawm kev muaj pes tsawg leeg thiab kev siv ntawm tus number case deg thiab rov qab ink hauv flexographic luam ntawv ntawm cov yas zaj duab xis, cov xim sib lawv liag rau cov txheej txheem luam ntawv yog raws li nram no:
Xim Sequence rau Surface Printing txheej txheem:Nyob rau hauv cov txheej txheem luam ntawv saum npoo rau yas zaj duab xis, tus number case dawb yog siv los ua xim xim los txhim kho cov teebmeem ntawm lwm cov xim. Cov xim sib lawv liag feem ntau txiav txim siab li dawb → daj → magenta → cyan → dub.
Xim Sequence rau Reverse Printing Txheej Txheem:Yuav kom ua tiav qhov pom kev zoo ib yam li kev luam ntawv saum npoo, cov xim sib lawv liag rau cov txheej txheem luam ntawv rov qab yuav tsum yog qhov sib txawv. Dawb number case, ua raws li lub hauv paus xim, yuav tsum tau luam tawm kawg yog li ntawd, thaum saib los ntawm lub hauv ntej ntawm lub luam ntawv, cov xim dawb tuaj yeem txhim kho cov teebmeem ntawm lwm cov xim. Yog li ntawd, cov xim sib lawv liag rau cov txheej txheem rov qab luam ntawv feem ntau yog xim dub → cyan → magenta → daj → dawb.
Cov kev txiav txim siab rau kev txiav txim siab xim nyob rau hauv yas zaj duab xis flexographic luam ntawv coj mus rau hauv tus account qhov sib txawv ntawm inks, solvents, abrasion resistance, auxiliary cov ntaub ntawv, thiab cov txheej txheem ua phaj ntawm nto thiab rov qab luam ntawv.