Genuine ACCU DYNE TEST™ Marker Pens are made with our reagent grade dyne testing fluids and employ a spring-loaded valve tip that keeps contaminants on the tip from affecting the accuracy of the test fluid in the test marker's barrel.
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Thus, the ACCU DYNE TEST ™ Marker Pen, which is based on a valve tip applicator. The principle is simple: Keep the testing part of the pen away from the fluid storage part of the pen (in other words, no wicking from the substrate). The diagram (right) demonstrates how that's accomplished; by pressing the tip firmly down, the valve is opened and fresh fluid floods the tip; this flushes it clean, and allows the tester to lightly pass over the sample to accurately determine dyne level. Results are based on how long the test solution takes to form beads on the sample surface.