Multi-angle gloss meters are used to measure the gloss of various materials, such as automotive paint, stone, plastic, paper and other products, and are used in many industries. In China, there are many manufacturers of multi-angle gloss meters, with various brands and models. During the purchase process, it is easy to suffer from selection syndrome. The selection of multi-angle gloss instruments needs to refer to the precautions in those aspects. The author lists the following according to his own experience:

Let's take a look at the principle of the Multi-angle gloss meter instrument: under the conditions of the specified light source and receiver opening angle, the ratio of the reflected light flux of the sample in the specular reflection direction to the reflected light flux of the glass standard in the specular reflection direction. Polished black glass with an index of refraction of 1.567 is given a specular gloss value of 100 (gloss units) at a geometric angle of 60 degrees. From the principle, we can see that the multi-angle gloss meter is a comparative test quantity that needs to be compared with the standard plate as a reference. If the standard plate is not accurate, other measurement data will not be discussed. The standard board is easily affected by scratches and dust. In the design of the instrument, it is necessary to consider that the standard board is well protected.

Secondly, the linearity of the measurement data of the Multi-angle gloss meter, from the principle of the multi-angle gloss meter, we can infer that the linearity of the measurement data of the instrument is an important factor related to the quality of the instrument. If the gloss standard plate is accurate, for example, the gloss of the standard plate is 95.5, then the measurement data for materials with a glossiness near 95.5 is generally accurate, but for materials with a gloss far away from the standard plate, the measurement data is accurate, It is necessary to ensure that the linearity of the instrument measurement system is excellent. The linearity of the instrument to measure the acquisition system is a difficulty in the design of multi-angle gloss instruments.