Testinks - Test Ink Method

These test inks measure the surface tension of polymers. Several inks with different surface tensions are available. Due to their simple use, these inks are often used in a production environment. For laboratories, these inks can be changed by a goniometer.

The test ink is applied quickly to the surface using the integrated brush of the bottle. Start with an ink with a high surface tension (such as 72 mN/m) directly after the pretreatment. If the brush stroke edges are stable for two seconds, the surface is easily wettable. Then, the surface tension of the substrate is at least equal to the value of the test ink. If the brush strokes of the test ink contract, the next lower test ink should be used. This way, you are gradually approaching the surface tension value of your material. The surface tension of the material is equal to the value of the test ink last used that showed good wetting for at least 2 seconds.

  1. Ethanol test inks (C Series)
    Suitable for all common surfaces. Non-toxic, non-harmful.
    Available from 28 to 72 mN/m (in increments of 2 mN/m)
  2. Formamide test inks (A Series)
    Especially suited for warmer surfaces, but not for PVC. Longer reading time. Toxic. Teratogenic.
    Available from 30 to 72 mN/m (in increments of 2 mN/m)
  3. Methanol test inks (B Series)
    Suitable for all common surfaces. Toxic. Available from 28 to 72 mN/m (in increments of 2 mN/m)
  • Non toxic test inks
  • Surface tension can be tested on smooth materials
  • Measuring ranges 34/36/38/40/42/44/46 mN/m
  • Available as a set of 7 bottles

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