High quality printed images are a necessity, especially on food packaging. Ink can’t bleed into the product, however, and that ink must bond securely to the packaging. Printed cups, such as for yoghurt or margarine, must be stacked together for transport before they are filled but ink transfers from one printed exterior to the interior of the next cup must be avoided at all cost.
Pretreatment with Openair® plasma can safely prevent this undesired effect. Thanks to plasma activation, bonding of printing inks to the food packaging is substantially improved. Inks will not rub off. The speed of subsequent flat or rotary screen printing can also be significantly increased.