Pazvinhu zvakadhindwa zvemhando yepamusoro, ruvara runowanzo kuve nechiyero chakatemerwa kuyerwa: ruvara rweinki rwebhechi rezvigadzirwa runofanira kuenderana kumberi nekumashure, kupenya muruvara, uye kunoenderana neingi hue uye inki ruvara rweyemuenzaniso sheet. .
Zvisinei, mukugadzirwa kwekudhinda nekuchengetedza, hue, chiedza uye kuzara kwezvinhu zvakadhindwa zvinowanzochinja. Kunyangwe iri monochrome inki kana inki ine mavara anopfuura maviri, ruvara runogona kusviba kana kupenya pasi pemukati nekunze mhedzisiro.
Tichifunga nezvemamiriro ezvinhu aya, isu tichakurukura newe nhasi zvinhu zvinokanganisa shanduko yemavara yezvinhu zvakadhindwa, izvo zvinowanzobatanidza zvinotevera zvinhu:
Kuchinja uye kupera kweinki nekuda kwekusashivirira kwechiedza
Pasi pechiedza chezuva, ruvara uye kupenya kweinki kuchachinja mumadhigirii akasiyana. Iko hakuna inki isingachinjiki zvachose pasina kushandura ruvara. Pasi pechiedza chezuva chakasimba, ruvara rweingi dzose ruchachinja mumadhigirii akasiyana. Shanduko iyi inogona kukamurwa kuita mhando mbiri.
Kupera:
Pasi pechiito chechiedza chezuva che ultraviolet, iyo inki ine hurombo husina kumira mushe, yakarasikirwa neyakajeka yayo yepakutanga ruvara, uye ruvara rwunova rwakachenuruka kusvika kuchena chena. Kunyanya, mavara eyero uye matsvuku anopera nekukurumidza mumaingi eruvara rwakareruka uye mana mavara akawandisa, nepo cyan neingi inopera zvishoma nezvishoma.
Discoloration:
Kusiyana nekupera kweinki nhema yezvinhu zvakadhindwa, ruvara runochinja zvakanyanya pasi pemhedzisiro yechiedza chezuva, uye ruvara runoshandukawo. Vanhu vanoti shanduko iyi inonzi discoloration.
Mhedzisiro ye emulsification
The offset printing plate haigoni kupatsanurwa kubva pakunyorovesa chikamu chisina chinhu cheplate nemushonga wekunyorova. Pakudhinda kweoffset, mvura inotanga kuiswa uye ipapo ingi inoiswa. Emulsification haidzivisiki kana mvura inoshandiswa.
Ruvara rweinki ruchadzikiswa mushure meemulsification, asi ichadzoreredza ruvara rwayo rwepakutanga mushure mekunge mvura yanyungudika. Naizvozvo, iyo yakakura iyo mvura iri, iyo yakakura iyo emulsification huwandu huchakonzera discoloration. Kunyanya, ingi dzemavara ane emulsion dzakasiyana zvachose dzakasanganiswa pamwe chete, uye chiitiko che discoloration chinonyanya kuzivikanwa.
Mamiriro epepa
1.Surface kutsetseka kwepepa
Kutsvedzerera kwepepa repamusoro kunoenderana zvakanyanya nekopi yekudhinda. Pepa risina kuenzana rinowanzoda kumanikidzwa kukuru kuita kuti inki ibatane nayo zvakanaka. Semuenzaniso, kana iyo inki viscosity, fluidity uye inki layer ukobvu zvinochengetwa pane imwe chiyero, kuwedzera kudzvanywa kunowanzo wedzera kupararira nzvimbo yekudhinda. Panguva imwecheteyo, zvikamu zvakaderera zveconcave zvepepa zvichiri muhutano husina kunaka. Semuyenzaniso, kana kudhinda kwebepa rakavharwa uye newsprint pane imwechete yekudhinda ndiro yakatosiyana, mhedzisiro dzakasiyana dzekudzokorora dzinogona kuenzaniswa zvakajeka.
2.Kutorwa kwepepa
Iyo absorbability yepepa zvakare yakanangana neiyo replication maitiro. Kazhinji, kana kudhinda yakasununguka bepa, kana ingi ane yakakwirira fluidity uye yakaderera viscosity, bepa achatora ingi layer zvibatanidza. Kana iyo dhayamita yepores yakakura kudarika dhayamita ye pigment particles, kunyange iyo pigment ichabatwa, iyo inoderedza kuzara kwemafungiro. Iyo inki layer ukobvu inoda kunyatsowedzerwa.
Nekudaro, kuwedzera kukora kweiyo inki layer kuchakonzera "kupararira" panguva yekutsikisa, izvo zvinokanganisa mhedzisiro yekukopa. Iri bepa rine kunyura kwakaderera rinogona kuita kuti yakawanda yeingi firimu ionekwe pabepa, kuitira kuti iyo yakadhindwa inki layer ive nani..
3.Permeability yepepa
Kupinda kwakanyanya kwebepa kunoderedza ukobvu hweinki layer, uye maburi mahombe ari pamusoro pepepa achaitawo kuti dzimwe pigment zvidimbu zvipinde mubepa panguva imwe chete, saka ruvara ruchava nekunzwa kupera. Nechikonzero ichi, shandisa bepa rine rough surface uye yakasununguka manyorerwo, uye bepa ine ingi yakakura fluidity, teerera discoloration.
Kupisa kupisa kwe pigment
Mukuita kuomesa ingi, kupenya uye nekukurumidza kuomesa adhesive inki inodhinda inonyanya oxidized conjunctiva drying. Pane danho rekugadzirisa kusati kwaoma kwe offset kudhinda inki. Iyo oxidation polymerization yeinki ndeye exothermic reaction. Kana kuomeswa kwakakurumidza, kupisa kwakawanda kuchabudiswa. Kana kupisa kuchibudiswa zvishoma nezvishoma, pigment isingadziviriri inopisa inoshandura ruvara.
Semuenzaniso, ingi yegoridhe inosviba uye inorasikirwa nekupenya kwayo kwepakutanga.
Pakudhinda, mapepa anorongedzerwa mumirwi patafura yekugamuchira mapepa. Nekuda kwekuwanda kwekuturikidzana, iyo shizha ingi iri pakati iine oxidized, polymerized uye exothermic, uye kupisa hakusi nyore kudzima. Kana kutonhora kwakanyanya, chikamu chepakati chichachinja ruvara zvakanyanya.
Mhedzisiro yeOiri Yakaomeswa
Chiedza chemavara ingi ndechemavara anotonhora, mwenje yero, emerald girini, dziva rebhuruu uye mamwe epakati ruvara ingi, usashandise tsvuku yakaoma mafuta, nekuti iyo tsvuku yakaoma mafuta pachayo ine yakadzika magenta, iyo ichakanganisa ruvara rwemainki emavara.
Mafuta machena akaoma anotaridzika akachena, asi anoshanduka akajeka mushure mekunge conjunctiva yakasvibiswa. Kana huwandu hwemafuta machena akaomeswa akakura, kudhindwa kwakaoma kunogona kunge kwakatsvuka tsvuku, nepo ruvara rwemafuta matsvuku akaomeswa eingi dzakasviba sebhuruu, dema nepepuru hazvizokanganisike zvakanyanya.
Pesvedzero yealkali kuramba kweinki yekudhinda
Iyo pH kukosha kwepepa rakadhindwa ndeye 7, uye pepa rakarerekera ndiro rakanakisa. Kazhinji, iyo inki yakagadzirwa ne inorganic pigment haina kusimba mu acid uye alkali resistance, nepo organic pigments yakanaka mu acid uye alkali resistance. Kunyanya, iyo yepakati yebhuruu uye yakasviba yebhuruu inki inopera kana yasangana nealkali.
Kana iri alkali, iyo yepakati yero ruvara inoshanduka kuita tsvuku, uye inopisa inodhinda anodized aruminiyamu foil uye kudhinda goridhe inoshanduka kune yekare yeyero kana ikasangana nealkaline zvinhu, isina kupenya. Bepa rinowanzo kushaya simba uye alkaline, uye binder ine alkaline inosangana muchikamu chekupedzisira chekudhinda nekusunga. Kana iyo yekurongedza uye yekushongedza kudhinda zvigadzirwa zviri kurongedza alkaline zvinhu, sesipo, sipo, washing poda, nezvimwe, iyo alkali kuramba uye saponification kuramba inki inofanirwa kutariswa.
Impact yenzvimbo yekuchengetedza
Pane zvikonzero zvakati kuti nei zvigadzirwa zvakawanda zvakadhindwa zvichizoita yero kana zvachengetwa kwenguva yakareba.
Mafibisi ari mupepa ane zvakawanda lignin uye discolor. Semuyenzaniso, mapepanhau akadhindwa pabepanhau anowanzoita yero uye ari brittle.
Zvizhinji zvezvigadzirwa zvekudhinda mavara zvakadhindwa neoffset mana mavara dot printing anodzima kana kupera nekuda kwekushomeka kwechiedza chekudzivirira uye kupisa kwepigment pasi pezuva, mazuva marefu, mhepo nemvura, kunze kwekupisa kwekushisa kwekunze, nezvimwe.
Iyo ingi Hongze inosarudza haisi yepamusoro chete, asiwo inochengetedza maitiro akasimba kana ichienzanisa ruvara rwechigadzirwa chakapedzwa munguva inotevera. Ingotipa chigadzirwa, uye isu tichatarisa nhanho yega yega zvinodiwa kwauri.
Kuti uwane rumwe ruzivo, ndapota taura nesu:
Nguva yekutumira: Oct-21-2022
