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#34
Subject: Your opinion about the best way to print on metallized BOPP.

We would like to know your opinion about the best way to print on metallized BOPP (metallized side of the film). Is it better to apply a primer before printing or an in-line corona treatment to be sure of a good adhesion of the ink?


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#35

Using a primer as well as an inline corona treatment.


#35
Author: Werner Geitner, HUECK FOLIEN Ges.m.b.H
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Subject: Using a primer as well as an inline corona treatment.

I am answering on behalf of the technical committee of the EMA (European Metallizers Association) and member of the "Ask AIMCAL" group to your question about the best way to print metallized BOPP film.

I would do both - using a primer as well as an inline corona treatment. The treatment is absolutely neccessary to be sure to get an adhesion especially when the metallized film is not absolutely fresh metallized. The primer would be useful because of two reasons: the adhesion of an unpigmented coating/lacquer on a critical substrate is better than the adhesion of a highly pigmented ink.
On the other side, if you are using a white ink in your printing design, you do need a primer to avoid the white ink to appear grey.

I hope this will answer your question. Should you have additional questions, please do not hesitate to contact us again.

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