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wilkinson-pic.jpgWelcome to 'Ask The Expert'. This page is moderated by industry consultant, Steve Wilkinson.This page featuresthe answers to your questions.Our visitorscan also post comments to these questions/answers as well. You can learn more about Steve's background and our 'Ask The Expert' pageby Clicking Here.

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September 1, 2010
Can you please explain the basics of corona treatment, how it works and how long the treatment will last, where are they best positioned, and finally what can be treated.

   Corona treating is a method of increasing the surface tension of most types of materials. Although you cannot see the treatment effect with you eye, after treatment the surface of the material will have become receptive to a wide range of inks, adhesives and other coatings.

   Corona treatment works by exposing the surface of a material to an electrical discharge, often called a corona. It is in the discharge area that oxygen molecules break up into their atomic form and bond to the ends of the molecules in the material being treated. It is this process that chemically activates the surface of the material. It should be understood that the treatment is not permanent and will degrade over time depending on the material and storage conditions. The best places for installation are in-line on your press and if blown film on the extruder itself, as fresh material is much more receptive to being treated. Virtually any material can be treated such as foils, paper, polyethylene, vinyl, paperboard, pvc and many more.

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