Dyne Pen and Bottle Solutions

 

Dyne Testing

Procedure.

Surface tension is the property of a liquid arising from unbalanced molecular forces at or near the surface. If it is higher than the surface energy of a material, the liquid tends to form droplets rather than spread out. Another name for an ink’s surface tension properties is ‘wettability’. Surface tension is normally measured in energy units called dynes/cm. A dyne is the amount of force required to produce an acceleration of 1 cm/sec2 on a mass of 1g.

The dyne level of a material is called its surface energy. If the liquid has a dyne level lower than the material’s surface energy, then the liquid will spread out over its entire surface in a uniform wet layer. If the ink’s dyne level is equal to or higher than a material’s dyne level, the liquid will become cohesive and tend to remain in droplets.

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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.

In addition to our family of pre-filled dyne test pens, IEEC continues to offer dyne test solutions in bottles. As part of our standard inventory IEEC offers our ASTM D 2578 compliant dyne test inks from 30 to 70 dyne/cm.

 

TESTING PROCEDURE TIPS

    • Spread the test fluid from the felt tip pen or from the Dyne Solution bottle using cotton Swab lightly over an area of approximately 7 cm of the test specimen, noting the time it takes for the continuous film of ink to break into droplets.
    • Breaking of the fluid into droplets in less than 2 seconds indicates a lack of wetting and a lower numbered test fluid should be tried.

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    • If the fluid remains intact for longer than 2 seconds, a higher numbered test fluid should be tried.
    • The aim is to establish the lowest reading at an optimum dwell time of 2 seconds.
    • Extreme care must be taken to ensure the film surface is not touched or contaminated in the areas in which the tests are to be made.
    • We recommend the replacement of the inks regularly if the bottled inks are frequently opened to atmosphere.
    • If bottled inks are exposed to the air on a daily basis: dispose of remaining inks after 3 months

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  • If bottled inks are exposed to the air on a weekly basis: dispose of remaining inks after 6 months.
  • If bottled inks are exposed to the air on a monthly basis: dispose of remaining inks after 6 months.

NOTE:

Disposal of dyne solutions is typically a locally regulated function. We recommend you contact your local municipality, or disposal service to learn how to properly dispose of any expired dyne solution.

While PBJ – Industrial Electronics Pvt. Ltd. believes the information contained herein is factual and the options expressed are those of qualified experts, this information is not to be taken as a warranty for which PBJ – Industrial Electronics Pvt Ltd assumes legal responsibility. It is provided solely for consideration, investigation, and verification.