Kev cuam tshuam ntawm Offset Printing ntawm Post-Coating hauv ntim
Ink Layer Thickness thiab Thaj Chaw ntawm Ntim Cov Ntawv Sau:Qee cov ntawv ntim khoom muaj cov duab kos duab dav dav, thiab qee qhov cuam tshuam nrog cov luam ntawv zoo, ua rau cov xim tuab tuab. Cov khaubncaws sab nraud povtseg tuab feem ntau tawm tsam kom ua raws li cov yeeb yaj kiab yas, ua rau delamination thiab bubbling sai tom qab kev sib txuas. Qhov no yog vim qhov ntom ntom txheej hloov cov yam ntxwv ntawm daim ntawv, kaw cov ntawv fibers 'capillaries thiab cuam tshuam kev nkag mus thiab kis ntawm cov nplaum rau ntawm daim ntawv. Qhov no cuam tshuam rau lub zog adhesion ntawm txheej txheej. Tsis tas li ntawd, kev hloov pauv hauv cov xim number case thickness thiab cheeb tsam ua rau muaj kev hloov pauv hauv qhov nro, cuam tshuam rau daim ntawv cog lus. Yog li ntawd, kev tswj nruj ntawm tus number case ntau thiab cov khoom ntom ntom yog qhov tseem ceeb hauv kev ntim khoom. Hauv kev ntim khoom offset luam ntawv, tus number case txheej yog nyias dua piv rau lwm txoj kev luam ntawv, feem ntau tswj tsis pub dhau 2-3µm rau txheej txheej.
Ink Selection rau Ntim Printing:Cov khoom lag luam coated los ntawm ntim luam ntawv yuav tsum siv ceev-teeb-gloss high-gloss offset printing inks. Cov inks no muaj xws li hluavtaws resins, ziab zaub roj, high-boiling point kerosene, lwm yam. Kev saib xyuas yuav tsum tsis txhob siv cov roj av ntau dhau, vim tias ntau dhau tuaj yeem ua rau cov number case qhuav sai, ua rau crystallization ntawm tus number case txheej nto thiab tsis zoo cuam tshuam rau cov nyhuv txheej. Cov neeg ua hauj lwm diluting tej zaum yuav xav tau rau lub teeb xim luam ntawv, thiab cov neeg ua haujlwm zoo diluting yuav tsum tau siv. Kev ceev faj tshwj xeeb yog qhia tawm tsam kev siv cov emulsifiers hauv cov xim dawb, vim tias cov xim tsis zoo ntawm cov xim dawb yuav tsis khi ruaj ntseg nrog cov khoom sib txuas, cuam tshuam adhesion.
Daim ntawv thov ntawm Printing Powder:Txhawm rau kom muaj kev kub ceev luam ntawv ntawm ntau lub tshuab luam ntawv thiab tiv thaiv rov qab los ntawm daim ntawv thaum luam ntawv, cov txheej txheem hmoov tshuaj feem ntau yog siv rau hauv ntim offset printing. Cov tshuaj txau, feem ntau muaj cov hmoov txhuv nplej siab thiab cov tshuaj tua kab mob ntuj, tuaj yeem tsim cov khoom ntxhib. Cov hmoov ntau dhau thaum luam ntawv tuaj yeem ua rau cov khoom no ntab rau ntawm qhov chaw luam ntawv. Raws li qhov tshwm sim, cov nplaum tsis sib xws nrog cov txheej txheem number case, cuam tshuam rau txheej txheej zoo. Yog li ntawd, kev tswj hwm cov hmoov tshuaj tsuag kom muaj nuj nqis yog qhov tseem ceeb hauv kev ntim khoom offset luam ntawv, siv qhov tsawg kawg nkaus uas yuav tsum tau ua kom tsis txhob muaj av.
Qhuav tej yam kev mob ntawm Printing nto thiab puab txheej:Kev ziab tsis zoo ntawm cov xim pleev xim rau ntawm qhov chaw luam tawm lossis cov khaubncaws sab nraud povtseg ntawm cov ntawv luam tawm cuam tshuam rau txheej txheej zoo, ua rau muaj teeb meem xws li bubbling thiab delamination. Ntau yam, suav nrog hom number case, ziab tus neeg sawv cev kom muaj nuj nqis, daim ntawv qauv, thiab qhov chaw ua haujlwm kub thiab av noo, cuam tshuam rau ziab ntawm txheej number case. Yog li ntawd, kev saib xyuas rau cov txheej txheem ziab khaub ncaws yog qhov tseem ceeb thaum luam ntawv. Ua tib zoo tswj ntawm tus lej-dej sib npaug, saib xyuas tus lej emulsification, thiab tswj cov qib acidity ntawm tus ciav dej yog qhov tseem ceeb. Tsis tas li ntawd, tswj lub rooj cob qhia kub thiab cov av noo kom ntseeg tau tias ob qho tib si saum npoo thiab sab hauv cov txheej txheem ntawm cov ntawv luam tawm tau qhuav txaus, lav cov txheej txheem zoo.