AFS Quickt test pen corona 38 dyn/cm
Measurement of the surface tension
The adhesion of a surface is usually directly dependent on the surface energy. If the surface energy is substantially lower than that of the printing ink used, the wetting is disturbed, resulting in poor adhesion.
The new 38 dyn/cm quick test pen is used to quickly and easily measure the surface tension of PE or PP films to indicate their printability with solvent based inks.
Is the surface energy value of a treated film 38 dyn/cm or higher, the ink will remain as a solid line. If the value is below that, the ink bubbles.
Thanks to the solvent based ink contained in the pen, the applied line dries in just a few seconds and makes wiping unnecessary.
- Quick and easy proof of surface treatment
- Exceptionally easy to handle
- Fast-drying ink
- Excellent readability due to particularly strong color
- Minimal consumption of test ink
For this reason, plastic surfaces have to be printed, depending on the type of ink used the surface tension required can vary:
- solvent based inks => 38 to 42 mN/m (=Dyn/cm)
- water soluble inks => 40 to 44 mN/m
- UV inks => 44 to 46 mN/m
With the test inks of AFS, which are available from 34 to 56 dyn/cm surface tensions of plastic films can be easily and reproducibly determined according to DIN ISO 8296. Depending on whether the ink sticks or bubbles on the surface it indicated whether the surface tension is above or below the dyne-value of the currently used test ink.
We also offer the test inks in a case with 12 bottles from 34 to 56 dyn/cm.