Kwimathiriyeli eprintiweyo ekumgangatho ophezulu, umbala ukholisa ukuba nomgangatho womlinganiselo omiselweyo: umbala we-inki webhetshi yeemveliso kufuneka ungqinelane ngaphambili nangasemva, umbala oqaqambileyo, kwaye uhambelane nombala we-inki kunye nombala we-inki wesampulu. .
Nangona kunjalo, kwinkqubo yokushicilela kunye nokugcinwa, i-hue, ukukhanya kunye nokugcwala kwezinto eziprintiweyo zihlala zitshintsha. Ingaba i-inki ye-monochrome okanye i-inki enemibala engaphezu kwemibini, umbala unokuba mnyama okanye ube lula phantsi kwemiphumo yangaphakathi nangaphandle.
Ngenxa yale meko, siza kuxubusha nawe namhlanje izinto ezichaphazela ukutshintsha kombala wezinto eziprintiweyo, ezibandakanya ngokubanzi ezi nkalo zilandelayo:
Ukutshintsha kombala kunye nokuncipha kwe-inki ngenxa yokunganyamezeli ukukhanya
Ngaphantsi kokukhanya kwelanga, umbala kunye nokukhanya kwe-inki kuya kutshintsha kwiidigri ezahlukeneyo. Akukho i-inki ekwazi ukumelana nokukhanya ngaphandle kokutshintsha umbala. Ngaphantsi kokukhanya kwelanga okunamandla, umbala wazo zonke ii-inki ziya kutshintsha ngamanqanaba ahlukeneyo. Olu tshintsho lunokwahlulwa lube ziindidi ezimbini.
Iyaphela:
Ngaphantsi kwesenzo sokukhanya kwe-ultraviolet yelanga, i-inki inokumelana nokukhanya okungahambi kakuhle, ilahlekelwe ngumbala wayo oqaqambileyo, kwaye umbala uba luthuthu ukuya kumhlophe ongwevu. Ngokukodwa, imibala etyheli kunye nebomvu iphelelwa ngokukhawuleza kwii-inki zombala okhanyayo kunye nokugqithisa kwemibala emine, ngelixa i-cyan kunye ne-inki ziphela kancinci.
Ukutshintsha umbala:
Ngokuchasene nokuphela kwe-inki emnyama yezinto eziprintiweyo, umbala utshintsha ngokunzulu phantsi kwefuthe lokukhanya kwelanga, kwaye umbala nawo uyatshintsha. Abantu balubiza olu tshintsho kukutshintsha kombala.
Isiphumo se-emulsification
Ipleyiti yokushicilela ye-offset ayinakuhlukaniswa nokumanzisa inxalenye engenanto yepleyiti kunye nesisombululo sokumanzisa. Xa kushicilelwa ioffset, kuqala kuqala kugalelwe amanzi kuze ke kugalelwe i-inki. I-emulsification ayinakuphepheka xa kusetyenziswa amanzi.
Umbala we-inki uya kuncitshiswa emva kwe-emulsification, kodwa uya kubuyisela umbala wawo wokuqala emva kokuba amanzi ephuphuma. Ke ngoko, okukhona amanzi emakhulu, kokukhona isixa se-emulsification siya kubangela ukujika kombala. Ngokukodwa, ii-inks zombala ezineemulsions ezihluke ngokupheleleyo zixutywe kunye, kwaye i-phenomenon of discoloration ibonakala ngokukhethekileyo.
Ubume bephepha
1.Ukuguda komphezulu wephepha
Ukuguda komphezulu wephepha kuhambelana ngokusondeleyo nekopi yoshicilelo. Umphezulu wephepha ongalinganiyo udla ngokufuna uxinzelelo olukhulu ukwenza i-inki idibane kakuhle nayo. Ngokomzekelo, ukuba i-viscosity ye-inki, i-fluidity kunye nobukhulu be-inki igcinwa kwisixa esithile, ukwandisa uxinzelelo kuya kwandisa indawo yokushicilela. Kwangaxeshanye, iindawo eziphantsi zeconcave zephepha zisanxibelelana kakubi. Umzekelo, ukuba iziphumo zoshicilelo lwephepha eligqunyiweyo kunye noshicilelo lweendaba kwipleyiti yoshicilelo efanayo zahluke kakhulu, iziphumo ezahlukeneyo zokuphindaphinda zinokuthelekiswa ngokucacileyo.
2.Ukufunxa iphepha
Ukunyanzeliswa kwephepha kwakhona kuhambelana ngqo nesiphumo sokuphindaphinda. Ngokubanzi, xa kushicilelwa iphepha elixengaxengayo, ukuba i-inki ine-fluidity ephezulu kunye ne-viscosity ephantsi, iphepha liya kutsala ngakumbi izihlanganisi zomaleko we-inki. Ukuba ububanzi be-pores bukhulu kunobubanzi be-pigment particles, nokuba i-pigment iya kuxutywa, eya kunciphisa ukugcwala kombono. Ubunzima bomaleko we-inki kufuneka bonyuswe ngokufanelekileyo.
Nangona kunjalo, ukwandisa ubukhulu boluhlu lwe-inki kuya kubangela "ukusasaza" ngexesha lokuprinta, okuya kuchaphazela umphumo wekopi yempembelelo. Iphepha elinokufunxa okuphantsi linokwenza ukuba uninzi lwefilimu ye-inki ibonakale kumphezulu wephepha, ukuze umaleko we-inki oprintiweyo ube nokuhluzwa okungcono..
3.Ukuqina kwephepha
Ukugqithiswa okuphezulu kwephepha kuya kunciphisa ubukhulu bomaleko we-inki, kwaye i-pores enkulu kumphezulu wephepha nayo iya kwenza ukuba amanye amasuntswana e-pigment atyhutyhe kwiphepha ngaxeshanye, ngoko ke umbala uya kuba nemvakalelo yokufiphala. Ngesi sizathu, sebenzisa iphepha elinomphezulu orhabaxa kunye nokuthungwa okuxekethileyo, kunye nephepha eline-inki eninzi yamanzi, nikela ingqalelo kwi-discoloration.
Ukumelana nobushushu be-pigment
Kwinkqubo yokomisa i-inki, i-inki yokuprinta encamathelayo eqaqambileyo kwaye ekhawulezayo yeyona i-oxidized conjunctiva drying. Kukho inqanaba lokulungisa phambi kokoma kwe-inki yokushicilela ye-offset. I-polymerization ye-oxidation ye-inki yi-reaction exothermic. Ukuba ukomisa kukhawuleza kakhulu, ubushushu obuninzi buya kukhutshwa. Ukuba ubushushu bukhutshwa kancinci, ibala elimela ubushushu liya kutshintsha umbala.
Ngokomzekelo, i-inki yegolide iba mnyama ize iphulukane nokubengezela kwayo kwasekuqaleni.
Xa kushicilelwa, amaxwebhu apakishwa kwizitaki kwitafile yokwamkela iphepha. Ngenxa yokupakisha kakhulu, i-inki yeshidi embindini i-oxidized, i-polymerized kunye ne-exothermic, kwaye ubushushu akulula ukubuchitha. Ukuba ubushushu buphezulu kakhulu, indawo ephakathi iya kutshintsha umbala ngakumbi.
Isiphumo seOli eyomileyo
Iinki zombala okhanyayo zezemibala ebandayo, i-yellow yellow, i-emerald eluhlaza, i-emerald eluhlaza kunye nezinye i-inki ezinombala ophakathi, musa ukusebenzisa ioli ebomvu eyomileyo, kuba ioli ebomvu eyomileyo ngokwayo ine-magenta enzulu, eya kuchaphazela umbala we-inks zombala okhanyayo.
Ioli eyomileyo emhlophe ibonakala imhlophe, kodwa ijika ibe mdaka emva kokuba i-conjunctiva ixutywe. Ukuba ubungakanani beoli emhlophe eyomileyo inkulu, ushicilelo olomileyo lunokuba lubomvu obomvu, ngelixa umbala weoli ebomvu eyomileyo kwiinki ezimnyama ezifana neblue, emnyama kunye nemfusa ayiyi kuchaphazeleka kakhulu.
Impembelelo yokumelana ne-alkali ye-inki yokushicilela
Ixabiso le-pH lephepha eliprintiweyo li-7, kwaye iphepha elingathathi hlangothi lingcono kakhulu. Ngokubanzi, i-inki eyenziwe nge-inorganic pigments ihlwempuzekile kwi-asidi kunye nokumelana ne-alkali, ngelixa i-organic pigments ilungile kwi-asidi kunye nokumelana ne-alkali. Ngokukodwa, i-inki ephakathi eluhlaza okwesibhakabhaka kunye ne-blue blue iya kuphelelwa xa idibana ne-alkali.
Kwimeko yealkali, umbala omthubi ophakathi uya kujika ube bomvu, kwaye isitampu esishushu se-anodized aluminium foil kunye noshicilelo lwegolide luya kujika lube tyheli lwakudala xa udibana nezinto zealkaline, ngaphandle kokukhazimla. Iphepha lihlala libuthathaka kunye ne-alkaline, kwaye i-binder equkethe i-alkaline idibana nayo kwinqanaba lokugqibela lokuprinta kunye nokubopha. Ukuba ukupakishwa kunye neemveliso zokuprinta zokuhombisa zipakisha izinto ze-alkaline, njengesepha, isepha, umgubo wokuhlamba, njl., ukuxhathisa kwe-alkali kunye nokumelana ne-saponification ye-inki kufuneka kuthathelwe ingqalelo.
Impembelelo yendawo yokugcina
Kukho izizathu ezininzi zokuba kutheni iimveliso ezininzi eziprintiweyo ngokuqinisekileyo ziya kuba tyheli xa zigcinwe ixesha elide.
Iintsinga ephepheni ziqulethe i-lignin kunye ne-discolor. Umzekelo, amaphephandaba ashicilelwe kushicilelo lweendaba adla ngokujika abe tyheli kwaye abe brittle.
Uninzi lweemveliso zoshicilelo zombala eziprintwe ngaphezulu kwe-offset yemibala emine yoshicilelo lwamachaphaza aguqulwe umbala okanye aphelelwe ngenxa yokunganyangeki kokukhanya kunye nokunganyangeki kobushushu be-pigment phantsi kwelanga, iintsuku ezinde, umoya kunye nemvula, ubushushu obuphezulu bangaphandle, njl njl.
I-inki i-Hongze ekhethayo ayikho phezulu kuphela, kodwa igcina isimo sengqondo esingqongqo xa ithelekisa umbala wemveliso egqityiweyo kwinqanaba lamva. Sinike nje imveliso, kwaye siya kujonga zonke iimfuno zenyathelo kuwe.
Ngolwazi oluthe vetshe, nceda uqhagamshelane nathi:
Ixesha lokuposa: Oct-21-2022
