Quick-Test pen in Detail
The adhesion of a surface is usually directly dependent on its surface energy. If the surface energy of a surface is significantly lower than that of the printing ink used, wetting is disrupted, resulting in poor adhesion.
For this reason, plastic surfaces to be printed must have certain surface tensions, depending on the type of ink used:
- Solvent-based inks => 38 to 42 mN/m (=dyne/cm)
- Water-soluble inks => 40 to 44 mN/m
- UV inks => 44 to 46 mN/m
Quick-Test pen, 38 mN/m
The Quick Test pen from AFS allows you to determine whether the 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 will remain as a continuous line. If the value is lower, the ink will bead. The effects described can be illustrated as follows:
Pre-treatment good
Pre-treatment bad
The solvent-based ink contained in the pen dries within seconds, making it impossible to wipe off.
Benefits of the AFS Quick-Test pen
- Quick and easy verification of surface treatment
- Exceptionally easy to use
- Quickly drying ink
- Excellent readability thanks to particularly strong color tone
- Minimal consumption of test ink
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