Corona Treating Essentials Quiz

It’s important to know the basics of corona treating when trying to improve adhesion for inks and coatings. The Quiz below tests your knowledge on common misconceptions about the corona treating process. If you have any questions regarding corona treatment, adhesion or specific application issues please contact us. For more in depth coverage of corona treating topics please visit our library of technical articles and webinars.

Good luck with the Quiz.

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TRUE OR FALSE: Dyne levels of treated materials are not permanent. Substrates do not retain their initial treat indefinitely.
- True
  False
TRUE OR FALSE: Using a corona treater always guarantees good ink adhesion.
- True
  False
TRUE OR FALSE: Backside treatment occurs when air is trapped between the substrate and the treater ground roll. To eliminate it, one needs to eliminate wrinkling or air pockets
- True
  False
TRUE OR FALSE: The output power (kilowatts) and watt density values are exactly the same so it doesn’t matter which one is used to control the treater.
- True
  False
TRUE OR FALSE: If the film is pretreated, corona treating prior to printing is never required.
- True
  False
As a rule of thumb, the substrate to be printed should be corona treated to a surface tension value (dyne level) that is ____ dynes/cm2 higher than the surface tension of the ink.
- 1
  5
  10
  20
The best way to run a corona treater:
- Power all the way up regardless of substrate or speed
  Power as low as possible to conserve energy
  With a watt density value of 3.5
  At the minimum power level that results in good ink adhesion
Which of the following is a possible cause of backside treatment?
- Wrinkles in the film
  Dirty ground roll
  Low web tension
  All of the above
Why should you bump treat (treating immediately prior to printing)?
- To eliminate surface energy as a printing variable
  To provide insurance against unexpected fluctuations in your films incoming films dyne level
  Because even pre-treated film may require a boost in surface energy
  All of the above
The most common source of preventable problems for corona treater stations and power supplies:
- Low input voltage
  Dust and dirt build-up on the treater electrodes and ground roll
  Pretreated film
  Lousy corona treater salesmen

Enercon Industries Corporation
W140 N9572 Fountain Blvd. | Menomonee Falls, WI 53051 | 262.255.6070