Dyne Test Pens Kit for flexo 36, 38 and 40 dyne /cms (4 units for each) are special liquid mixtures that allow assessing the level of adherence of a liquid on a plastic surface. Used mainly in the Laboratory, they allow accurate measuring of the effects of corona treatment. Dyne Test Pens are a convenient alternative to liquid mixtures. They are used by operators that handle the production lines to check if a material has been treated, or not. Kolorguide offer high quality, dyne test pens and Inks, for the film, extrusion and web Converting Industry and other industries.