How important is proper web (film) tension in the corona treating process?
Without the proper tension wrinkles could develop allowing air onto the back-side of the web. Anytime air gets up anywhere behind the web (e.g.; in between the web and the ground roll of the corona treater) back-side treat can occur. With this phenomena occurring, treatment would be seen at a lower dyne level on the primary side and some minor treat on the back-side. This obviously leads to inconsistent ink adhesion and poor printing capability.