High quality “class A” surfaces are expected to have a clear and brilliant appearance. Micro structures can cause a milky appearance. This effect is described as milkiness or haze and is often caused by specific parameters in the production process like resin type, degree of dispersion or application process. Haze can be characterized by measuring the diffuse scattered light. BYK-Gardner haze meters are used for years as a reference in the paint and plastic industry to ensure a brilliant quality.