Flexographic Printing Blog by Luminite Products Corp

Flexographic Printing Blog by Luminite Products Corp

Flexo Printing Defects Diagnostic Chart & Troubleshooting Guide

There’s an equation for printing success. Too much press downtime while troubleshooting defects isn’t a part of it. Wasted time is wasted money.

This diagnostic chart helps you quickly hone in on your flexo printing defects and their likely causes, so you can get your machines back in business.

Luminite flexographic printing defects grid

Click here to download the grid and accompanying guide. For more detailed instructions on how to use the chart and interpret results, download the full Printing Defects Troubleshooting Guide below.

How to Read the Flexo Printing Defects Diagnostic Chart

Vertical Axis: Types of Flexo Printing Defects

We generally recognize 12 common defects in flexographic printing. As you can see from the checklist, they are:

  • Dot gain
  • Gear marks
  • Halo
  • Feathering
  • Doughnuts
  • Skip out
  • Misregister
  • Mottled image
  • Filling in
  • Bridging
  • Pinholing
  • Dirty print

In our experience, they stem from 10 common causes.

Horizontal Axis: Causes of Flexo Print Defects

  • Pressure
  • Press mechanics
  • Anilox
  • Cell volume
  • Ink transfer
  • Ink viscosity
  • Ink pH level
  • Contamination
  • Plate swelling
  • Drying speed

On this grid, printing defects are listed down the left column with their potential causes on the top row.


Get the Full Flexo Printing Defects Troubleshooting Kit to Identify & Fix Your Printing Issues

The full guide contains details about each defect, explanations of the causes, and instructions on how to fix each one. Depending on the severity of your issues, troubleshooting may involve:

If you have any further questions, request a free printing defects consultation, email sales@luminite.com, or call 1 (888) 545-2270.

Ready to move forward with a solution? Request a quote here.  


Flexo Printing: Ink Transfer


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Flexo Printing: Ink Transfer

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