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Příčiny

Accordingtoexperienceandanalysisofnewspapers,ghostimagesaremainlycausedbythefollowingreasons:

1) Špatné seřízení tlaku

Theprintingpressureandthecontactpressurebetweenthevariousinkrollersarenotinthebestprintingstate,causingpartialinkshortageandforming"ghostimages".Theinkrollersarerequiredtohavegoodcontactwitheachothertoensurethenormaltransmissionoftheink,andthecontactshouldnotbetoolightortooheavy.Accordingtocommonsense,thethinsolidlinesonthelayoutarenoteasytoproduce"ghostimages",butduetoimproperadjustmentofthepressurebetweentheinkrollers,thenormalinktransferandwatersupplywillbeaffected,andthephenomenonof"ghostimages"willalsooccur.Aslongasthepressureisre-adjustedtoensurethesmoothandeventransferoftheink,the"ghostimage"phenomenoncanbeeliminated.However,iftheprintingpressureistoolight,therewillbepartialblurringintheprintedproduct,andwaterrippleswillalsoappearinseverecases.

2)Válcové a ložisková kola jsou opotřebovaná

Thejournalofthecylindershaftoftheprintingpressisequippedwithhelicalgearsforpowertransmissionandprecisepositioning.Duetothefastrunningspeedandlongworkinghoursofthepress,thewearisnaturallyserious,anditiseasytocausethegearmeshinggaptobetoolarge,causingthecombinedpressurebetweenthelongitudinalrollerstoslip,andthecontactbetweenthegearsisslightlymisaligned,causing"ghosting".Thesolutiontothisproblemistoreplacegearsandbearings;reducethecenterdistanceoftherollerstoreducethegapbetweentherollers.

3)Délka a tisková deska nejsou utaženy

Theblanketisnotstretchedtightly,causingtheblanketcylindertonotberesetintimeafterbeingpressedortheblanketisskewedduringcutting,Resultingin"ghosting".Theprintingplatecanalsocause"ghostshadows"duetoinadequateworkandnotightening.Carefullycheckatwork,thesefaultscanbasicallybeeliminated.

4)Návrh rozvržení novin je třeba zlepšit

Usingthicksolidlines,regionalisolationlinesordecorativelinestodesignthelayout,theselinesareperpendiculartothedirectionoftheinkrolleroftheprinter,andTherearepicturesonbothsidesofthelineortherearelightermeshdecorativestripsperpendiculartotheinkroller,so"ghostimages"arelikelytooccuronthesemeshdecorativestrips.Thereasonisthatthickandsolidlinesconsumelargeamountsofinklocallyinprinting,andthereareoftenblankpartsonbothsidesoftheline.Duetothestructuralcharacteristicsoftheprinter,theinkrollercannotbefilledwiththerequiredinkintime,causingthephenomenonof"ghostimaging".Aslongaswearefamiliarwiththeaboveprinciplesandperformcorrectoperations,wecanreducetheoccurrenceof"ghostimages".

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