Surface test fluids were introduced to give an accurate measurement of graduated surface tension levels. The fluid is applied to the surface or substrate until a satisfactory dyne level is found.Sherman Test Dyne Pens are designed to indicate film surface treatment levels on polymer based substrates and establish that the material is correctly treated prior to printing. The barrel of the pen is printed with the minimum dyne level that the ink will determine.

Sherman equipment is developed for trouble free, high performance, minimum maintenance and maximum operator convenience. All equipment comes complete with Intrinsically Safe Interlocks, Calibrated Air Gap Adjusters. Close coupled High Tension Transformers with no trailing leads, no danger, no short circuits. Sherman Treater Stations are not gravity dependent and will perform at any angle.