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How To Measure Surface Tension Using Dyne Pen?
- The test is carried out by simply marking the line over the substrate/material to be used or processed, if the line remains intact exactly for 4 seconds before peripheral shrinkage takes place, the dyne level of the substrate is same as of dyne value of Mapple Dyne Corona Test Pen
- If the marked line turns into droplets immediately, that means the dyne value of the substrate/material is lesser than the dyne value of the Mapple dyne Corona Test Pen used. (To know the exact dyne value, use lower dyne value of Mapple Corona dyne Pen & so on to reach the exactness.)
- If the marked Line do not breakes into droplets (peripheral Shrinkage) after 4 seconds that means the dyne value of the material of the substrate is higher than the dyne value of the Mapple dyne Corona Test Pen Used. (To know the exact dyne value, use higher dyne value of Mapple Corona dyne Pen & so on to reach the exactness.)
- Do not repeat the test on the same area of material/substrate.
- The correct dyne level will be equal to the marked line that remains exactly intact for 4 Seconds before droplets or Peripheral Shrinkage Occurs.
GENERAL GUIDELINES
- Always place the sample on a clean, leveled surface, always mark from left to right in order to maintain the same consistency.
- Record ambient temperature and relative humidity. If sample temperature differs from ambient, allow it to stabilize
- A minimum of 3 sample points should be tested: 14, ½ and 34 across the film/ substrate section. It is a good practice to test the outer edges as well.
- Use of repetitive marking on the same place of substrate/material to be used or processed will result in false reading.
- Treated Surfaces are time sensitive and are affected by environmental conditions such as temperature and humidity.
- Do not touch or contaminate the surface to be tested, dirty surfaces lose their wetability, therefore clean the test level area.
- Store and use pens at room temperature.
- The Pen should not be exposed to direct light. Therefore keep them closed when not in use. Also repeated ink exposure to air, will alter the dyne levels. Properly Sealed pens prevent this from occurring.
CORONA TREATMENT
Have you ever wondered why it is difficult to write or print on plastic-why the ink is smearing when you rub it.? The reason is the relative energy between the two surfaces, and the only way to solve the problem is to modify the surface of the plastic and increase its adhesive capability. The process capable of this is called Corona treatment.
MAPPLE CORONA DYNE PENS
The use of Mapple Dyne Pen is the Quickest & Easiest way to know that a plastic substrate has sufficient surface tension wetability for Printing, Coating & Laminating Processes.
Our dynes pens are supplied in dyne value range from 30 to 56 dyne/cm in steps of 2 dyne. They can be purchased in a pack of 10 in dyne levels of your choice and come with full instructions.