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Ink and Media Troubleshooting logic Oct 2011

Learn the main principles of troubleshooting ink and media issues, including drying/curing problems, low adhesion, UV ink flexibility, color gamut change, overspray, banding, bleeding, and more.

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Ink and Media Troubleshooting logic Oct 2011

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  1. Ink and Media Troubleshooting logicOct 2011 By: Vadim Baliasny

  2. Ink & Media – Troubleshooting Main Principles • First question – GENERIC or LOCAL ? • Second question – MACHINE, INK or MEDIA ?

  3. Ink & Media – Magic triangle INK • Magic triangle • Dual action problem ? PRINTER MEDIA

  4. Ink & Media – Troubleshooting logic • Four types of ink problems • Drying/curing • Media related (adhesion, flexibility, light fastness) • Quality (color gamut, overspray, banding, bleeding) • H/W related (clogging heads, filters)

  5. Drying/Curing Problem Possible Reasons: • Dryer/UV unit is broken • Check if all heating elements/UV lamps are functioning • Check shutter mechanism and UV lamp switching timing • Drying/UV lamp is not sufficient • Check temperature/UV radiation level and uniformity • Clean UV lamp glass Workaround: Use both UV lamps or higher temperature setup, use slower print modes. • Ink is contaminated or damaged • Check other batch of ink • Ink coverage is too high • Check with application specialist ink percentage in dark areas of the file. Reduce if needed. Recommended coverage is not more than 280% • Media related • Use alternative media if all the above is checked and fixed

  6. Media related – Low Adhesion Possible Reasons: • Media related • Use alternative media • Customer application requires higher adhesion lever • Use alternative media • Use coating/varnish/lamination to protect ink layer • Ink is contaminated or damaged • Check other batch of ink • Drying/curing is not sufficient • See drying problem

  7. Media related – UV Ink Low Flexibility Possible Reasons: • Ink limitation • No solution for old ink versions. TJ210 and FB225 improved dramatically ink adhesion and flexibility. • Ink coverage is too high • On file preparation stage reduce ink percentage to the minimum possible level. Especially 4 color Black areas. Workaround: for ink chipping on edges after cutting – printing on pre cut media

  8. Media Related – light fastness – ink fading before 2 years • Media related • Spec is related to specific media only • Zone related • Spec is related to central European zone • Application related • For 90º applications only Possible Reasons:

  9. Quality - Color Gamut Change Possible Reasons: • Ink is out of spec, damaged or expired • Check another ink bottle/batch • HW related • Check possibility to light and dark ink mixing in the system • Check ink supply system setup • Media is affecting by UV system • Print blank file to see the differences. Check another media • Wrong color profiling • Check profiles correctness. Check RIP setup. Create other new profiles.

  10. Quality - Overspray • Site environment conditions (humidity, temperature) are not according to SitePrep • Inform customer and check if fixed • Static electricity • Humidity is too low (see above). Clean media with air gun/wet rug. Check another media. • PH distance to the media is too big • Adjust to minimal • Ink is out of spec, damaged or expired • Check another ink bottle/batch • HW related. PH are clogged, slow ink supply – starvation, electronic noise, data noise • Replace PH • Check ink supply. Compare to other separations • Replace driver/CCB board • Check printing file

  11. Quality – Banding • Clogged PH • Replace PH • Slow ink supply – starvation • Check ink flow interrupters • Check another ink batch • Registration problem • Readjust registration • Media is uneven or damaged • Check another media • HW related. PH uniformity problem. • Replace PH, adjust voltage • White banding • Color banding

  12. Quality – Bleeding • Drying/curing is not sufficient • See above • Media is not suitable • Check another media • Gloss mode is too slow for specific media • Move to faster mode • Ink coverage is too high • Check printing file and reduce ink coverage – see above

  13. HW damaging/clogging • Ink system is not 100% compatible with the ink • Limitation – follow maintenance procedure • In case of ink jellying do not clean metal parts but replace them • Ink is out of spec, damaged or expired • Check another ink bottle/batch • Ink system was exposed to heat, light, air • Eliminate the source, seal possible areas • Ink was contaminated with damaged FF • Use only 1L FF bottle and according to requirements. 1 year shelf life and 3 months after opening. • Ink was contaminated with dust, fibers etc. at customer site • Demand from customer to provide appropriate cleanness and maintenance level

  14. New Ink and Media section in the Support Zone Where to find the new section Content

  15. Thank You

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