Tag Archives: contact angle measurments

  • Convex eyeglass lens inspection

    Broadening the Abilities of the Surface Analyst

    The Surface Analyst™ has the unique ability to measure on almost any surface: vertical, horizontal, smooth, rough, mirrored and in an easy, accurate, fast, and non-destructive way. However, until now, measuring on concave and convex surfaces presented an obstacle. Now BTG Labs’ Surface Analyst boasts a new specialized head for measuring on concave and convex surfaces.

    Before, the only way to measure on these surfaces was with a benchtop goniometer which can only measure on flat or convex materials. Goniometers measure contact angle from a horizontal view. However, a concave material prevents visual of the horizon line needed to determine the contact angle. The closest one could get to measuring a concave surface was to use a flat coupon of the same material. While this would offer insight to the surface energy of the material, it would not be exact because it would not be the actual concave part, thus allowing for guesswork. …Read More

  • 5 Primary Uses of the Surface Analyst

    by Emily Walsh August 2016

    The Importance of Surface Cleanliness


    BTG Labs’ Surface Analyst™ is a fast, easy, accurate, nondestructive, handheld device. It uses contact angle to measure the cleanliness level of a surface. Understanding and defining surface cleanliness within manufacturing is necessary. How a manufacturer qualifies a properly prepared surface can differ depending on the surface preparation process and requirements. Measuring and monitoring surfaces applies to many different steps within the manufacturing procedure. Consequently, the Surface Analyst applies to situations like: data collection, process development, supplier verification, identifying present and potential issues, and anticipating possible contaminants.


    Inspecting dish washer with surface analyst

    Surface Analyst taking measurement.

    Surface Preparation and So Much More


    BTG Labs breaks down the 5 Primary Uses of the Surface Analyst. This demonstrates the multifaceted ways in which the Surface Analyst can refine surface preparation processes to reinforce reliable, consistent, and strong adhesive processes.

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  • SAE International

    Society of Automotive Engineers International

    BTG Labs will be attending the SAE (Society of Automotive Engineers) AMS Aerospace Organization Coatings Committee (AMS G-8)’s annual meeting May 3-5. Dr. Giles Dillingham and Lucas Dillingham will present on “An Integrated Approach to Quantification of Contaminant Effects on Surface Sensitive Processes.” The presentation is based on a collaboration with Lockheed Martin Skunkworks under DARPA support about a new approach at studying surface contaminants. This new approach proposes studying contaminants according to their chemical structure rather than the conventional way which studies the effects of complex contaminant mixtures without identifying and studying individual contaminants. G-8, a branch of SAE, studies adhesive bonding of composites and composes the handbook for bonding composites in aircraft, as well as the publication of the CMH-17 Handbook. SAE strives to standardize language relevant to data generation, testing, and reporting of composites. Below is the abstract for Dr. Dillingham’s presentation.


    An Integrated Approach to Quantification of Contaminant Effects on Surface Sensitive Processes ~ Lucas Dillingham, Giles Dillingham / BTG Labs


    The detrimental effects of a contaminant are determined by i) the amount of the contaminant in the environment, ii) the affinity of the contaminant for the critical surface, and iii) the compatibility (i.e. solubility) of the contaminant in the adhesive or coating.  The most common approach for evaluating contaminant effects has been to evaluate the effect of a complex blend of multiple contaminants. Because this approach provides no information as to what makes a given contaminant detrimental, it limits our ability to predict the effect of an untested contaminant.    Developing an understanding of the relationship between contaminant structure and effect can lead to more intelligent design of surface preparation processes, more robust adhesive and coating formulations, and more reliable manufacturing processes.

    …Read More