Category: Surface Tension

We supply two chemically different types of Dyne Test Inks or Dyne Test Fluids, both covering the full surface energy range from 23 to 72 mN/m. The right choice for you depends on health and safety considerations, material compatibility, and accuracy. Type 1 – ISO Type Dyne Test Inks These inks are formulated to comply […]

In 1774, Benjamin Franklin did something quietly brilliant. Standing beside a blustery pond on Clapham Common in London, he poured some oil (reportedly from his cane) onto the water. Within moments, ripples vanished. A choppy surface turned mirror-smooth. It was one of the earliest recorded observations of surface tension. Franklin wasn’t thinking about surface tension […]

As medical device designers and manufacturers, you often depend on the property wetting, which can lie at the heart of your product’s reliability. Wetting determines two critical things: How well your adhesives, inks, or coatings adhere – ensuring structural integrity and compliance How effectively your coatings perform – from hydrophilic lubricity to hydrophobic protection In […]

A sessile drop refers to a liquid droplet that’s placed on a solid surface. The term stems from Latin sessilis, meaning “sitting,” emphasising that the drop remains stationary on the substrate. It’s literally attached at its base, offering a stable configuration for optical analysis. The sessile drop method is a technique we very commonly use for […]

 In previous posts we’ve discussed What is a du Noüy ring and What is a Wilhelmy plate.  However, when measuring surface tension or interfacial tension with a force tensiometer, how do you choose which probe is best? When measuring interfacial tension (i.e. between two immiscible liquids such as oil and water) the du Noüy ring […]

Our partners Biolin Scientific are hosting a webinar about surfactants, led by surfaces expert Susanna Laurén. Taking place on 4 June, you will learn about the different roles of surfactants in industrial processes and products. Susanna will look at how surface tension measurements can help you optimise your product performance and what type of surface […]

A Wilhelmy plate is a thin plate used to measure the surface tension or interfacial tension of a liquid. The plate’s dimensions are usually on the order of a few square centimetres, with a thickness of ~0.1 mm – very thin to minimize buoyancy effects and to ensure high sensitivity. It is made from an […]

We have added a Technical Bulletin to the website entitled How to clean and store a du Noüy ring. We get asked this question a great deal, so it’s knowledge worth spreading around. Please download and share with your colleagues.

Our latest white paper is from Conor Kelly, who answers the question What’s the difference between surface tension and surface energy? In an application where adhesion is required (printing, bonding, sealing, painting, coating, etc), understanding the surface tension and the surface energy of the components – and, crucially, the difference between them – can be […]

A force tensiometer measures surface tension by determining the force required to detach a probe or ring from the liquid’s surface, that force being directly related to the liquid’s surface tension. Sigma 702 Force Tensiometer has a motorised sample stage, and an ultra-sensitive balance. The integral control screen allows you to simply set parameters and press […]

Since Dyne Testing Ltd was acquired by Intertronics, our interest in – and understanding of – surface science has expanded past surface measurement to adhesion, adhesive performance and surface treatment. We’ve combined all of our aspects on surface treatment, surface measurement, and surface preparation into one place, alongside some relevant products. Have a look at […]

The du Noüy ring is a piece of scientific apparatus used to measure the surface tension of liquids. Named after the French physicist Pierre Lecomte du Noüy, it is a key component in the ring detachment method. It is typically made of platinum or platinum-iridium alloy to ensure cleanliness and avoid contamination, and is usually […]

A tensiometer is an instrument used to measure the surface tension of liquids. It can also measure other properties, like contact angle. Surface tension comes from the cohesive forces between the molecules of a liquid. At the surface of a liquid, the molecules predominantly experience forces pointing inward, leading to the formation of a ‘skin’ […]

Earlier this year we acquired Dyne Testing Ltd, a supplier of surface measurement products. Here Peter Swanson, (PS) Founder and Executive Chair of Intertronics, sits down with Alison Fox (AF), Brand Manager of Dyne Testing, to discuss trends in the UK’s surface measurement market. PS: Can you give me an overview the surface measurement equipment user base in the […]

OneAttension software for the Theta and Theta Lite Optical Tensiometers and the Sigma 700/701 Force Tensiometers combines the most intuitive user interface with a high level of functionality. The all-inclusive software supplied with the instruments enables immediate access to all measurement capabilities with no need to purchase and install separate software modules. It features an intuitive user interface, live […]