---
title: Negative doctor blade lines (gravure print)
description: Relatively continuous defects in the printed area, which affect individual rows of cells and always...
image: https://www.tkmgroup.com/hubfs/%5Bv20%5D/Blog/Negative-Rakelstreifen.png
---

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Trouble Shooting in gravure print

# Negative doctor blade lines (gravure print)

In this article we explain how negative doctor blade lines occure in garvure print and how to avoid them.

![](https://www.tkmgroup.com/hubfs/%5Bv20%5D/Blog/Negative-Rakelstreifen.png)

 21.09.2020 [ TKM ](https://www.tkmgroup.com/en/troubleshooting/author/tkm)

## Negative doctor blade lines (gravure print)

Relatively continuous defects in the printed area, which affect individual rows of cells and always occur in the direction of printing. These streaks do not necessarily have to move with the doctor blade oscillation. Often foreign particles trapped under the doctor blades' bevel are responsible for this.

**Solutions to negative doctor blade lines:**

- Check the colour for dirt and foreign particles, replace clogged filters and replace colour if necessary.
- Carefully polish the impression cylinder with fine sandpaper, fold down the doctor blade holder and remove the doctor blade bevel with a cloth and solvent.
- Check and readjust the doctor blades' angle.

TKM recommends TKM CeraPrint and TKM PowerPrint, for filtering the ink TKM Magnet Series 8000

### Relevant articles

- [
  
  
  
  ##### Chattermarks (flexography)
  
  
  
  ](https://www.tkmgroup.com/en/troubleshooting/chattermarks-flexography)
- [
  
  
  
  ##### Positive doctor blade lines (gravure print)
  
  
  
  ](https://www.tkmgroup.com/en/troubleshooting/prositive-doctor-blade-lines-gravure-print)
- [
  
  
  
  ##### Prevent ink spitting (flexography)
  
  
  
  ](https://www.tkmgroup.com/en/troubleshooting/prevent-ink-spitting-flexography)
- [
  
  
  
  ##### Ghosting (flexography)
  
  
  
  ](https://www.tkmgroup.com/en/troubleshooting/ghosting-flexography)

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