Product Description
These specialist dyne pens identify whether substrates are suitable for post-print applications such as hot foil stamping (and/or glues and coatings). In summary, for best adhesion results it is necessary to have a high surface energy on the substrate you’re applying to. Measuring the surface energy is sometimes referred to as corona testing (with corona pens) or surface tension testing.
Profoil offers the optimum pen levels for achieving the best results of surface energy testing within the workability range of hot foil stamping applications on packaging materials.
Dyne Technology pens provided exclusively from Profoil have a unique valve tip applicator, unlike other brands which offer a basic “felt tip” style pen. This in principle provides the best and most accurate results by eliminating wicking from substrates and potential cross contamination of tests, and therefore we recommend Dyne Technology branded pens for consistent, accurate results.
When the foil surface test pen fluid is applied to the substrates surface, the liquid molecules will either form a continuous film on the surface or shrink and breakup to form small droplets. If the test fluid remains as a continuous film for 3-4 seconds, the test concludes that the substrate does have the minimum surface energy of the Dyne ink value which was tested. However, if the fluid instantly contracts and separates into droplets, then the surface energy of the test substrate is lower than that of the Dyne ink value applied. To obtain the exact surface energy (Dyne level) of a substrate, you should use a range of Dyne test pens and increase/decrease in Dyne values.
Testing of substrates for hot foil stamping is an excellent tool for information gathering on problematic scenarios when undertaking repeat or large production runs. Testing both positive and negative substrates can identify changes in materials, inks and pre-manufacturing processes before hot foil blocking production is attempted. Contains Dyne pen levels 32, 34, 36, 38, 40 and 42, with 36-38 being Profoil’s known ideal dyne level for hot foil stamping (always validate independently with positive testing too).