METHOD AN DEVICE FOR MEASURING COARSENESS OF A PAINT FILM

摘要

A method for analyzing the visual coarseness of a paint film comprising effect pigments by means of a measuring device having a cavity with reflective inner walls and a sample opening, the device further comprising illumination means for illumination of the cavity and a digital imaging device directed from the cavity to the sample opening and arranged at a distance from the centre normal of the sample opening, the method comprising the following steps: presenting a sample of the paint film to the cavity via the sample opening; illuminating the cavity; activating the imaging device to record an image of the sample; communicating the recorded image data to a computer programmed with image analysis software to analyze the recorded image. The optical axis of the imaging device is set at an angle of 3-12 degrees with the centre normal of the sample opening.