Cold Foil For Offset txoj kev loj hlob ntawm lub computer number case xim txuam system thiab lub hauv paus ntsiab lus ntawm xim txuam

Cold Foil For Offset txoj kev loj hlob ntawm lub computer number case xim txuam system thiab lub hauv paus ntsiab lus ntawm xim txuam

 

Cov xim ntawm tus number case yog ib qho ntawm cov cim tseem ceeb uas cuam tshuam rau qhov zoo ntawm cov ntawv luam tawm, yog li ntawd, kev faib cov number case tau dhau los ua cov txheej txheem tseem ceeb ua ntej luam ntawv. Lub hauv paus ntsiab lus ntawm kev sib txuam xim yog raws li kev xav ntawm cov xim synthesis thiab xim sib xyaw. Nrog rau txoj kev loj hlob ntawm cov cuab yeej siv hluav taws xob hauv computer, cov khoos phis tawj tuaj yeem khaws cov ntaub ntawv ntau, nrog rau kev ua haujlwm siab ceev, nrog kev pab los ntawm txoj kev xav ntawm colorimetry mus rau ib tug loj tus naj npawb ntawm cov ntaub ntawv hauv paus thiab xim qhov tseem ceeb rau kev ua, los ntawm tib neeg-lub computer. dialogue xim txuam, ceev ceev, siab precision, kev taw qhia ntawm nws cov printing teb, yuav ua rau cov xim tswj thiab zoo nrhiav kom paub ntau niaj hnub.

 

Ua ntej, kev txhim kho thiab cov yam ntxwv ntawm lub computer xim txuam

 

1. Kev txhim kho ntawm lub computer xim txuam

Nyob rau hauv industrially-tsim lub teb chaws, colouring industries, xws li textile printing thiab dyeing, dyes, pigments, coatings manufacturing, yas colouring processing thiab number case industries feem ntau siv computer xim txuam tshuab raws li ib tug haib cuab tam rau cov khoom tsim, ntau lawm, zoo tswj thiab muag khoom. , thiab tus nqi nrov yog siab. Piv txwv li, nyob rau hauv xyoo tas los no, cov tuam txhab kho qhov muag txawv teb chaws tau tsim Gerinda Macbeth number case formulation software InkFormulation4.0, uas tuaj yeem npaj cov qauv zoo rau kev luam ntawv offset, flexographic printing, screen printing thiab rotary gravure printing industries. Nws muaj cov yam ntxwv ntawm tsis siv neeg formulation thiab ceev ceev multi-channel xam ceev, thiab sai sai npaj cov nqi qis formulations. Lub interface ntawm lub qhov rais software yog tus phooj ywg, thiab cov qauv yog qhov tseeb thiab qhov kev vam meej ntawm ib qho kev npaj yog lav.

 

Hauv 10 xyoo dhau los, ntau yam qauv ntawm cov xim sib xyaw ua ke tau qhia hauv Suav teb, tab sis cov txiaj ntsig tseem ceeb tsis tau ua tiav. Cov software tsim tawm txawv teb chaws yog ua raws li cov yam ntxwv ntawm kev lag luam kev lag luam hauv Tebchaws Europe thiab Tebchaws Meskas, thiab cov xim zoo yog qhov ruaj khov. Txawm hais tias kev lag luam hauv tsev muaj nws tus yam ntxwv, kev ruaj ntseg ntawm cov xim zoo yog qhov tsis zoo, ua ke nrog ntau yam khoom siv xim tam sim no tau hloov kho tas li, ntau cov substrates tshiab tshwm sim, thiab cov xim uas twb muaj lawm hauv tsev thiab txawv teb chaws. tsis muaj peev xwm hloov kho tau yooj yim, yog li kev siv tswv yim ntawm cov xim sib xws tau ntsib teeb meem.

 

Shenyang Research Institute of Chemical Industry pib kawm cov xim sib txuam hauv xyoo 1984, cov uas xav xim sib piv Suav software yog qhov ntxov tshaj plaws suav xim sib txuam software hauv Suav teb. Siv cov software system, tag nrho cov nqi ntawm lub tshuab hauv tsev yog 1/3 ntawm tag nrho cov system, yog tias nws yog txuam nrog lub tshuab tuaj txawv teb chaws, tag nrho cov nqi yog 1/2 ntawm lub tshuab tuaj. Lub kaw lus tam sim no siv ntau tshaj 70 lub tuam txhab, npog cov xim, luam ntawv thiab dyeing, wool spinning, knitting, xim, number case, roj hmab, wallpaper thiab ntau lwm yam kev lag luam xim. Tsis tas li ntawd, Xi'an University of Technology tau tsim lub tshuab computer xim sib txuam siv cov xim densitometer thiab kev sib txuas hauv computer, uas muaj qhov yooj yim thiab universality ntawm nrov thiab daim ntawv thov. Los ntawm txoj kev loj hlob tam sim no, kev sib txuam xim hauv computer tau dhau los ua ib feem tseem ceeb ntawm kev sib txuam xim xim rau yav tom ntej.

 

2. Cov yam ntxwv ntawm lub computer xim txuam

 

(1) Nws tuaj yeem txo lub sijhawm sib xyaw xim, txo tus nqi, thiab txhim kho cov xim sib piv.

 

(2) tuaj yeem suav cov qauv kho hauv lub sijhawm luv luv.

 

(3) Tag nrho cov xim number case uas tau phim yav dhau los tau muab khaws cia rau hauv cov ntaub ntawv, thiab tuaj yeem siv tam sim ntawd thaum xav tau.

 

(4) Yooj yim rau kev khiav lag luam.

 

(5) Kev suav cov qauv xim thiab xim sib txawv yog digitally tso tawm lossis luam tawm los ntawm lub khoos phis tawj, thiab qhov kawg xim sib piv cov txiaj ntsig kuj tseem khaws cia hauv lub cim xeeb hauv daim ntawv digital.

 

(6) tuaj yeem txuas nrog lwm lub tshuab ua haujlwm. Piv txwv li, lub cev hnyav tuaj yeem txuas nrog kom txo qis qhov hnyav; Reproducibility yog txhim kho, yog tias cov txheej txheem txuas ntxiv mus, cov ntawv luam tawm kev soj ntsuam zoo tuaj yeem teeb tsa rau ntawm cov khoom luam tawm, thiab thaum muaj xwm txheej txawv txav tshwm sim, nws yuav nres tam sim thiab txo cov khoom pov tseg uas tsis tsim nyog.

 

Thib ob, lub computer xim txuam txoj cai thiab qhov system

 

1.Kubelka-Munk txoj kev xav thiab nws cov kev txwv

KM txoj kev xav tau raug npaj thaum ntxov li xyoo 1931, tab sis nws tsis yog txog xyoo 1958 uas nws tau pib ua tiav hauv kev lag luam textile thiab dyeing, thiab kev lag luam luam ntawv pib siv txoj kev xav hauv xyoo 1970s.

 

Lub khoos phis tawj xim sib txuam tsim los ntawm Tebchaws Meskas, Nyij Pooj thiab lwm lub tebchaws yeej tseem siv txoj kev xav no.

Los ntawm kev sib piv ntawm KM txoj kev xav, daim ntawv yooj yim tshaj plaws ntawm kev ua haujlwm thiab nws daim ntawv derivative tsim nyog rau cov xim sib xws suav nrog:

 

K/S=(1-r)2/2r

r=K/S+1-[(K/S+1)2-1]1/2

Qhov twg r sawv cev rau qhov kev xav ntawm wavelength; K yog qhov nqus coefficient, uas sawv cev rau lub teeb nqus tus nqi ntawm microelement thickness dielectric txheej tom qab qhov teeb meem ntawm diffused illumination lub teeb nyob rau hauv ib qho infinitely tuab tiaj nruab nrab. S yog tus scattering coefficient, sawv cev tus nqi tawg ntawm lub teeb los ntawm lub thickness ntawm lub caij.

 

Txog tam sim no, lub hauv paus ntsiab lus ntawm lub computer xim txuam (CCM) tseem ua raws li KM txoj kev xav. Piv txwv li, spectral vision matching method, computer reflection spectrum color matching method, computer color matching approximation algorithm yog tag nrho raws li KM txoj kev xav. Txawm li cas los xij, nyob rau hauv kev siv lub tswv yim ntawm KM txoj kev xav, feem ntau muaj qhov sib txawv ntawm kev xam cov theoretical thiab kev coj ua, uas tuaj yeem muab sau ua ob yam.

 

KM txoj kev xav nws tus kheej yog muab los ntawm qee qhov kev xav.

Ua ntej, yog hais tias lub thickness ntawm cov xim txheej yog x thiab lub teeb ntog ntawm ib lub caij txheej dx, lub reflection tshwm sim los ntawm lub interface yog tsis coj mus rau hauv tus account. Yog li ntawd, cov xim txheej siv txoj kev xav yog immersed nyob rau hauv nruab nrab nrog tib lub refraction Performance index. Qhov algorithm no, uas tsis quav ntsej qhov sib txawv refraction indices ntawm lub interface thiaj li yooj yim rau qhov teeb meem, yuav ua rau yuam kev.

 

Qhov thib ob, dx yog ib txheej txheej nyob rau hauv lub thickness ntawm cov xim txheej x, yog li qhov nqus coefficient thiab tawg coefficient tau raug suav tias yog tib yam thiab zoo ib yam thoob plaws hauv cov xim txheej thaum siv, tab sis qhov kev xav no nyuaj rau siv rau kev ploj lossis semi-extinction ntawm oily cov ntaub ntawv.

 

Thib peb, cov xim xim hauv cov xim txheej tsis zoo, yog li lub teeb nyob rau hauv cov xim txheej dhau los ua ib daim ntawv diffuse, thiab cov khoom yog tag nrho rau hauv cov nyhuv diffusion, uas ua rau sab sauv thiab qis dua. Txawm li cas los xij, hauv kev siv tswv yim, thaum cov khoom muaj nyob rau hauv daim ntawv nyias nyias ntawm cov roj zaj duab xis, feem ntau ntawm lawv tau teem rau hauv txoj kab rov tav, nws yuav ua rau kev puas tsuaj ntawm luminous flux kev xav ntawm ob txoj kab.

 

Plaub, ntawm cov xim nyias nyias, lub teeb tau nkag mus rau sab hauv ntawm cov xim txheej yam tsis muaj sijhawm tawg, hauv cov suab tsaus, ntau lub teeb tau raug absorbed ua ntej tawg, yog li cov kab teeb nkag mus rau hauv cov xim txheej tsis yog diffused, ua rau muaj qhov sib txawv loj hauv kev sim cov txiaj ntsig.

 

Kev lag luam luam ntawv yuav tsum xav txog kev sib cuam tshuam ntawm lub teeb thiab cov xim pigment thiab lub cev lub zog ntawm tus cwj mem thaum piav qhia cov nyhuv ntawm tus number case superposition. Hauv kev siv tswv yim, nws yuav tsum tau hais tias KM txoj kev xav muaj ob qhov tsis tu ncua, raws li, qhov nqus coefficient K thiab tawg coefficient S. Lub peev xwm tawg ntawm tus number case rau lub teeb tuaj yeem tsis quav ntsej piv nrog lub peev xwm tawg ntawm lub substrate, yog li. Lub hauv paus ntsiab lus xim ntawm tus cwj mem yog qhov kev xaiv ntawm tus cwj mem rau lub teeb, thiab lub peev xwm nqus ntawm tus number case rau qhov teeb meem teeb pom kev cuam tshuam los ntawm lub thickness ntawm tus number case txheej thiab cov number case concentration. KM txoj kev xav tau muab tso rau hauv qhov chaw ntawm opaque media, thiab cov inks siv hauv kev luam ntawv yog pob tshab lossis pob tshab, yog li KM txoj kev xav muaj qhov tsis zoo.

 

2. Kev siv peb qhov kev txhawb nqa rau lub computer number case xim txuam

(1) tri-stimulus tus nqi xim txuam

Raws li cov kev txwv ntawm K / S thiab cov yam ntxwv ntawm kev lag luam luam ntawv, daim ntawv no nthuav tawm ib txoj hauv kev sib xyaw xim uas siv tus nqi tristimulus. Txoj kev no tsis siv K / S tus nqi, kev xav thiab lwm yam xim ntsuas, tab sis tsuas yog siv tus nqi tristimulus ua cov cim xim.

 

Raws li lub hauv paus ntawm K / S txoj kev xav, tristimulus tus nqi xim txuam tuaj yeem ua tau, tab sis nws yog ib qho tsim nyog los teeb tsa cov ntaub ntawv ntawm K / S tus nqi thiab kev xav, thiab kawm txog kev sib raug zoo ntawm tristimulus tus nqi thiab concentration, uas yog, lub kev sib raug zoo ntawm tus nqi tristimulus thiab dot feem pua. Hauv kev luam ntawv, txoj hauv kev tseem ceeb ntawm kev hloov pauv ntawm trististimulus tus nqi thiab qhov feem pua ​​​​ntawm cov lej yog Newjberg kev sib npaug hloov pauv, hloov pauv matrix thiab saib lub rooj hloov pauv. Nyob rau hauv daim ntawv no, chromatography yog siv los tsim lub rooj nrhiav kev hloov dua siab tshiab.

 

(2) Peb-stimulus tus nqi xim txuam txoj cai

Raws li CIE tus qauv colorimetry system, txhua yam xim hauv qhov xwm txheej tuaj yeem sawv cev los ntawm spectral tristimulus qhov tseem ceeb X, Y, thiab Z. Tam sim no, cov cuab yeej ntsuas xim siab tshaj plaws siv qhov chromaticity system, uas yog, xim ntawm txhua yam khoom tuaj yeem qhia tau. los ntawm peb-stimulus tus nqi X10, Y10, Z10. Lub hauv paus ntsiab lus ntawm kev sib xyaw xim ntawm lub computer yog tsuas yog siv lub hauv paus ntsiab lus ntawm isochromism, uas yog, yog tias peb qhov kev txhawb nqa ntawm X10, Y10 thiab Z10 ntawm ob qho qauv xim sib npaug, ob qho tib si xim.

 

Lub rooj saib xyuas tsim los ntawm chromatography piav qhia txog kev sib raug zoo ntawm tus nqi ntawm trististimulus thiab feem pua ​​​​ntawm cov dot ntawm cov xim xim. ib co qauv xim yog overprinted los ntawm peb inks a, b thiab c, thiab qhov feem pua ​​​​ntawm peb tus cwj mem no yog l, m thiab n, feem, yog li qhov piv ntawm tus number case A, b thiab c yog l∶m∶n, thiab tus number case dawb rau (1-l)+(1-m)+(1-n). Qhov kev sib txuam xim no siv cov ntaub ntawv ntawm CIE tus qauv teeb pom kev zoo D65 thiab 10 degree kev pom, thiab siv CIELAB xim txawv mis: ΔEab=[(ΔL)2+(Δa){{9 }}(Δb)2]1/2 los xam cov xim txawv ntawm tus qauv xim qauv thiab cov qauv xim sib xws.

 

Peb tuaj yeem pom tias siv tus nqi ntawm peb stimuli rau lub computer xim sib txuam tuaj yeem ua rau cov xim ntawm cov qauv xim kom haum rau hauv ib lub teeb ci tshwj xeeb yog qhia los ntawm cov ntaub ntawv, muaj kev sib raug zoo ntawm tus nqi ntawm peb stimuli ntawm cov qauv xim. thiab tus number case piv, thiab cov qauv tuaj yeem xam nrog cov xim sib txawv kuaj seb nws ua tau raws li qhov yuav tsum tau ua.

 

(3) peb-stimulus tus nqi xim txuam txoj kev

Qhov tristimulus qhov tseem ceeb ntawm cov xim blocks thiab qhov feem pua ​​​​ntawm txhua tus cwj mem tau nkag mus rau hauv lub computer los tsim cov ntaub ntawv yooj yim. Thaum cov xim sib txuam, tus nqi tristimulus ntawm lub hom phiaj xim qauv yog nkag mus rau hauv lub cev, lub kaw lus suav cov xim sib xyaw thiab nws qhov kev faib ua feem, thiab tso tawm cov qauv kev twv ua ntej. Thaum tus number case qauv ntawm cov xim sib piv yog qhuav, qhov peb-stimulus tus nqi yog ntsuas, thiab qhov zoo sib txawv yog xam los ntawm lub computer raws li cov xim txawv mis, thiab ntxiv kho cov lus qhia yuav tau sai formulated nrog zoo dua heterochromatic spectrum xim. .

 

Nyob rau hauv cov nqe lus ntawm cov kev cai zoo ntawm cov xim luam tawm, raws li cov kev cai meej ntawm lub teb chaws tus qauv rau cov xim sib txawv ΔE * ab ntawm tib batch ntawm cov xim kho kom zoo nkauj prints, daim ntawv no xaiv ΔE * ab Tsawg dua los yog sib npaug rau 3.

 

Cov xim spectrum suav nrog feem ntau ntawm cov xim sib txawv, rau cov xim hauv cov spectrum, koj tuaj yeem pom qhov sib piv ntawm tus number case, tab sis tsis yog nyob rau hauv cov xim spectrum, koj tuaj yeem nqa cov xim hauv cov spectrum kom pom qhov sib txawv xim tsawg tshaj plaws, thiab tom qab ntawd los ntawm txoj kev linear interpolation los daws.

 

3. Khoos phib tawj xim txuam system

(1) Kev ua haujlwm ntawm cov xim sib txuam

Khoos phib tawj xim txuam system yog cov cuab yeej siv niaj hnub ua ke nrog cov ntsuas xim, khoos phis tawj thiab xim txuam software system. Lub luag haujlwm tseem ceeb ntawm lub khoos phis tawj xim sib piv yog khaws cov ntaub ntawv xim ntawm tus cwj mem siv rau xim sib txuam hauv lub computer ua ntej, thiab tom qab ntawd xam qhov sib xyaw ntawm cov xim ntawm cov qauv nrog cov inks kom ua tiav lub hom phiaj ntawm predetermined mis.

 

(2) Kev sib xyaw ntawm cov xim sib txuam

① Kho vajtse ib feem ntawm lub computer xim txuam system

Khoos phis tawj: Siv Windows operating system, hard disk cia qhov chaw tsawg kawg yog 20MB; Spectrophotometer; Cov xim spectrum.

 

② Khoos phib tawj xim txuam software system

Software cov ntawv qhia zaub mov tseem ceeb: tso saib cov ntawv teev npe ntawm cov xim sib txuam software, kom tus neeg teb xov tooj muaj kev nkag siab dav dav ntawm cov xim sib xws software, kom tus neeg teb xov tooj tuaj yeem xaiv thiab hu rau qhov kev zov me nyuam tso tawm hauv cov npe raws li lawv lub hom phiaj.

 

Cov ntaub ntawv yooj yim: Siv Microsoft Access los tsim cov ntaub ntawv database, suav nrog ob-xim overprint, peb-xim overprint thiab pom xim overprint 3 qhov chaw.

Cov ntaub ntawv suav nrog kev tsim cov ntaub ntawv yooj yim, kev tswj hwm, kev ua cov ntaub ntawv thiab cov txheej txheem khaws cia.

 

③ Formula xam thiab kho

Hu rau qhov kev pab cuam no los xam cov xim sib txawv ntawm cov xim sib piv thiab cov qauv qauv, xaiv cov qauv raws li xim txawv, thiab hloov cov qauv.

 

Cov xim sib xyaw ua ke software muaj lub zog txiv neej-tshuab sib tham ua haujlwm, thiab tus neeg teb xov tooj tuaj yeem nkag mus rau qhov tsis sib xws thiab cov ntaub ntawv raws li cov lus qhia ntawm lub khoos phis tawj kom tau txais tus lej number case.

 

Kev sib xyaw xim yog ib qho kev sib xyaw ua ke nrog cov kev xav ntawm lub teeb xim, number case, ntawv, txheej txheem thiab lwm yam, kev siv cov chromatography rau peb-stimulus tus nqi xim txuam, kov yeej cov kev txwv ntawm KM txoj kev xav, haum rau cov yam ntxwv ntawm kev lag luam luam ntawv, txo. lub nra ntawm cov neeg ua haujlwm xim sib xws, txhim kho cov khoom xim zoo, xim sib txuam nrawm, raug, thiab ua kom muaj txiaj ntsig kev lag luam. Txawm hais tias tseem muaj ntau qhov chaw yuav tsum tau ua kom zoo dua qub, xws li qhov sib txawv ntawm cov xim sib txawv suav los ntawm tristimulus tus nqi xim sib piv nyob rau hauv cov teeb pom kev sib txawv, cov xim sib txawv ntawm qhov tseeb muaj kev sib raug zoo nrog qhov tseeb ntawm chromatography. Txawm li cas los xij, nrog kev hloov kho tas mus li ntawm cov khoos phis tawj, cov cuab yeej siv tau zoo dua, qhov tshwm sim tsis tu ncua ntawm ntau txoj hauv kev ua lej thiab cov txheej txheem ua ntu zus thiab cov ntaub ntawv ntawm cov ntaub ntawv, kev sib xyaw xim hauv computer yuav inevitably qhia qhov zoo ntawm qhov tsis sib xws.