The adhesive strength of a surface usually depends on its surface tension. In case the surface tension of a surface is much lower than the surface tension of the used ink, the wetting is disrupted. This results in a poorer adhesion.
The AFS Quick Test Pen allows you to determine if pretreatment of polyethylene or polypropylene films is sufficient for printing with solvent-based inks. If the surface energy value of a treated film is 38 mN / m (= dyn / cm) or higher, the ink remains as a solid line.
Quick and easy proof of surface treatment
Exceptionally easy to handle
Fast drying ink
Very good readability due to particularly strong color
Minimal consumption of test ink