
ControlPanel
4. TroubleShooting
4.1.SampleprintedbytheMulti-section InkProofing Press arenotcoherentwiththose from
printer
Reason Examination&Solution Reference Column
Rollerplatens
areunclean.
Examination:stop themachinebeforefilling ink;erasetheplaten
byusingawhiteclothwithsolutiontoexaminewhethertheclothis
dyed.Thecolorof frontalpart isnonuniformfromthehinderpartor
thereissandholesontheplatenaretheunexpectedsituations.
Solution:washtheplatenbyusingabluent,orscouritrepeatedly.
PrimaryCause
Non-uniform
thickness of
ink-layer.
Examination:observebyeyeortestbyinstrument
Solution:controlthequantityofinkduringproofingprocess.
Testthequalitycontrolbarby
spectrophotometerandbyeye.
Inkisnot
dispersed
homogeneously.
Solution:extend thedistributingtimeorimprovethedistributing
method.
Theproofing inkisnotcoherent
withtheinkinduck
Thewaterin
tankisunclean.
Examination:observebyeyewhenitiscontainedbyatransparent
container.
Solution:changewater.
Obviouseffectonthelightor
brightcolor
Inkisoxidized.
Examination:measurepHvaluebyusing pHmeter;measureroller
platentemperaturebyusinginfraredradiationthermometer.
Solution:adjustpHvalue,conductivity,watershortageorroller
platentemperature.
Ingeneral,the() isactive,the
otherinkisinoxidable.
Inkisover
emulsified.
Examination:measureinkemulsifiabilitybyusing emulsification
tester.
Solution:adjustpHvalue,conductivity,watershortage,roller
platentemperatureorchangeappropriateink.
Causedbytheinsufficientwater
sincetheconstantlycontact
betweeninkand fountainsolution.
Generally,thehueisnothugely
affected,buttheinkwillbecome
3%shallower.