Chances are good that you already know what viscosity is, but you’ve probably never needed to put the definition into words. Quite simply, viscosity is the measure of the thickness of a liquid. More specifically, viscosity is the resistance offered by a fluid to outside stress placed upon it. More viscous fluids are thought of as “thicker,” while less viscous fluids are usually considered “thinner.” For example, syrup is more viscous than water, and oil is more viscous then vinegar. Absolute, or dynamic, viscosity is the resistance a fluid offers to flow when placed next to another fluid moving at a given speed. Kinematic viscosity is the measure of a fluid’s absolute viscosity when divided by its density.
To a person uneducated about the nuances of commercial painting, measuring coating thickness may seem like a simple and straightforward task. In reality, there are a variety of ways to measure the thickness of an applied paint or coating.
It’s a story familiar to everyone in the painting industry: a small company wins a chance to make a big impression with a new customer only to see their hard work be for naught when they unexpectedly run out of paint. Despite planning meticulously, the team wonders what went wrong and how this costly mistake could have happened. It isn’t hard to imagine this hypothetical. A commercial painting company in Cedar Rapids, Iowa wins a contract from the local school district. The work was straightforward: repainting the classrooms of two elementary schools and one middle-school over a holiday break. The painting company agreed to provide the materials and the work to complete the job before school resumed. The job began without delay with each painter working to do the best work possible, hoping their commitment to excellent service would lead to even more work from the school district.