Category: Contact Angle Measurement

Water contact angle (WCA) describes the shape a droplet of water forms when placed on a surface. If the water spreads out, the water contact angle is low. If it beads up, the water contact angle is high. This matters because the way a liquid wets a surface strongly affects processes such as adhesive bonding, […]

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 […]

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 […]

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 […]