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To make films (especially plastics) printable, their surfaces must often be electrochemically modified and activated using the so-called corona treatment. In this process, the films pass through a high-voltage field in corresponding corona machines. In these machines, the use of high-quality ceramic electrodes is preferable when it comes to the treatment of aluminum-, paper- and metal-backed films. Aluminum oxide-based electrodes have a very long service life and enable corona discharges with a high power density for the treatment of both conductive and non-conductive materials. Available in various different profile shapes (especially square tubes), our aluminum oxide electrodes meet the highest demands for dimensional stability, surface quality and dielectric strength.
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