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A quick and easy way of measuring surface wetting or surface energy.
When the Dyne level test pen is applied to the surface, the liquid will either form a continuous film on the surface or pull back into small droplets.
If the Dyne test fluid remains as a film for 3 seconds, the substrate will have a minimum surface energy of that ink value, expressed in mN/m (Dynes).

The Dyne Pen experts Dyne Testing Ltd explain simply what is a Dyne Pen and more importantly, how does it measure surface energy?

Dyne Pen Test Kit

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Dyne Pen Test Method
Dyne Test Pen

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Call us: +44 (0) 1543 411 460

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Call us: +44(0) 1543 411 460

Call us: +44(0) 1543 411 460

Call us: +44(0) 1543 411 460

Call Us: +44(0) 1543 411 460

Why measure surface energy?

In general, the ability of a substrate to anchor inks, coatings, or adhesives is directly related to its surface energy. If the substrate surface energy does not significantly exceed the surface tension of the fluid which is to cover it, wetting will be impeded and a poor bond will result.  Therefore, assessing surface energy before printing, coating or laminating is attempted is an important part of many industries' manufacturing processes.

 

It is important to note that while surface energy is critically important to many converting operations, it is not the sole determinant of product suitability. Factors such as the surface topography, coating rheology and chemical incompatibility must also be considered. This is why broad-based communication with vendors and customers is so important but by systematically measuring surface energy, you will have a sound starting point from which to resolve other problems should they arise.

What is a Dyne?

The unit of measurement of Surface Energy is Dyne/cm² this can also be expressed in mN/m. Dyne = Unit of force equal to the force that imparts an acceleration of 1cm/sec/sec to a mass of 1 gram.   1 Dyne = 0.00001 Newtons. 

What materials can Dyne Pens be used on?

Dyne test marker pens perform well on most non-absorbent materials. It is critical that the test fluid does not alter the surface properties of the substrate. For example, if the test fluid permeates a fibre substrate (e.g. paper) and causes swelling, results will indicate unrealistically easy wetting. A chemical reaction between the test fluid and the substrate invalidates results altogether. 

Standard Dyne Pen Sets

Standard Pack (6 Pens):         36, 40, 44, 48, 52 & 56 mN/m

Self Select Pack (6 Pens):      Even numbers between 30 & 60 mN/m

Converter Pack (6 Pens):       38, 38, 42, 42, 44 & 44 mN/m

Blown Film Pack (6 Pens):    34, 34, 38, 38, 42 & 42 mN/m

QA Pack (9 Pens):                    30, 34, 38, 40, 42, 46, 50, 54 & 58 mN/m

QA+ Pack (12 Pens):               30, 34, 36, 38, 40, 42, 44, 46, 48, 50, 54 & 58 mN/m

Maxi Pack (16 Pens):              30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 58, 58 & 60 mN/m 

All you need to know...