BYK-Gardner’s BYK-mac is an instrument used to objectively characterize the total color impression of effect coatings in automotive applications. The portable device measures flake characterization with a camera and thereby detects the visual impression of sparkling and graininess, simulating effect changes under direct and diffuse lighting conditions. The BYK-mac also measures multi-angle color to give more information about the color travel of special-effect finishes. The device uses an illumination system that guarantees stable, long-term, and temperature-independent readings, according to the company. To guarantee stable readings on flat and curved samples, the device is equipped with trigger pins on the bottom plate of the instrument.