The test inks are fluids of defined surface tension, which are available in bottles of 10, 100, 250, or 1000 ml. The surface energy of a substrate is checked by simply applying the test ink to the surface. The accuracy of the measurement is ± 1 mN/m (dyne/cm).

The test inks are available in a range from 18.4 to 105 mN/m (dyne/cm) at almost any value. In the standard range between 28 and 56 mN/m (dyne/cm), there are different sets offered, consisting of 7 bottles of 10 ml each, with a small brush for the application integrated into the cap.

• Possibility of quick measurements with high accuracy
• Good readability, also on rough or dark surfaces
• No pollution of the ink if a pipette or cotton swabs are used for the application
• Wide range of special surface tensions available on special demand