Isitshixo kumgangatho woshicilelo lweinki gravure: viscosity

I-Viscosity iphenjelelwa zizinto ezininzi, kubandakanywa i-viscosity yendalo yesisombululo se-binder resin, iimpawu ze-pigment (ezifana nokufunxa ioli, umlinganiselo, ubungakanani bamasuntswana, kunye nokusabalalisa), ukuhambelana phakathi kwee-pigments kunye nezibophelelo, kunye nohlobo kunye nesixa se-solvents. Umkhwa wexesha elizayo we-inki ye-intaglio yeplastiki yindibaniselwano yoxinzelelo oluphezulu kunye ne-viscosity ephantsi.

• I-Viscosity inempembelelo ebalulekileyo kumgangatho wokuprinta: i-viscosity ephezulu inciphisa u-fluidity, okubangela ukuzaliswa okungaphelelanga kweeseli okanye amabala amhlophe; yenza amandla amakhulu kwi-blade kagqirha, ebangela ubunzima bokukrazula kunye ne-blade streaks; kwaye ithintela ukuhanjiswa kwe-inki, okukhokelela ekuvalelekeni. Ngakolunye uhlangothi, i-viscosity ephantsi kakhulu ikhuthaza ukuhamba kwe-inki ngokugqithiseleyo, kubonakala njengee-watermark, ukucaca okuncitshisiweyo, kunye nokwanda kwamathuba okuba nemiba ye-electrostatic, ethintela ukufana kombala.

• I-viscosity yokusebenza ye-inki kufuneka ihlengahlengiswe ngokwesantya sokushicilela kunye neempawu zepleyiti. Ushicilelo olukhawulezayo lufuna i-viscosity ephantsi yokudluliselwa kwe-inki ngokufanelekileyo; nangona kunjalo, ii-inki ezingaphantsi zinokuphuhlisa ii-watermark kwii-viscosities eziphantsi kakhulu, ezingafanelekanga kwiinkqubo zesantya esiphezulu. Iithowuni ezinzulu kunye neendawo eziqinileyo zifuna i-inks ye-viscosity ephezulu yokuvelisa kwakhona, ngelixa imimandla ekhaphukhaphu, ngakumbi leyo inamagqabantshintshi, ixhamla kwii-inki ze-viscosity ezisezantsi. Ii-inki ezikumgangatho ophezulu zibonelela ngoluhlu olubanzi lwee-viscosity eziguquguqukayo, ngelixa ezona zihlwempuzekileyo zinendawo emxinwa kwaye zilinganiselwe ekusebenzeni kwi-viscosity ephezulu.

• Izinto eziphembelela i-inki yokusebenza kwe-viscosity ibandakanya umlinganiselo wokongezwa kwe-solvent, ukusebenza kakuhle kokunyibilikiswa kwe-solvent, i-ambient kunye nobushushu be-inki, ireyithi yokunyuka kwe-solvent, kunye nebhalansi ye-solvent. Ukongeza i-solvents ngokufanelekileyo kunokulungelelanisa i-viscosity, kodwa ukuyigqithisa kunokukhokelela kwiziphene; indibaniselwano ye-solvent eyahlukeneyo yandisa ukunyibilika; ukuguquguquka kweqondo lokushisa kuchaphazela i-viscosity kunye nexesha lokumisa; i-solvent evaporation ifuna ukuzaliswa kwangethuba ukuze kugcinwe i-viscosity ezinzileyo; kunye nokungalingani kwe-solvent kunokubangela i-viscosity anomalies okanye i-resin precipitation, efuna ulungelelaniso lokubunjwa kwe-solvent yokubuyisela ukulingana.