In addition to the visual impression, a 3-angle-glossmeter and a roughness tester are used in mirrorINOX for quality control.

The 3-angle-glossmeter is used to measure high-gloss (20-degree geometry), medium gloss (60-degree geometry) and matt gloss (85-degree geometry). The principle of the gloss measurement is based on the measurement of the specular reflection. For this purpose, the intensity of the reflected light is measured in a narrow range of the reflection angle.

In cases of measurements of roughness (roughness / surface roughness), the unevenness of the surface height is measured and reported in microns. When readings are the mean roughness Ra (arithmetic mean roughness) and the average roughness Rz.

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