Optical inspection of film quality inspection - "film Gloss Determination Method"

GB1743-79 stipulates that 45 is used. The gloss meter measures the gloss of the coating film. ISO 2813 specifies three angles (20°, 60° and 85°) to suit different measuring objects.

As we all know, the gloss of the same sample is obviously different when viewed from different angles. If the gloss of the coating film is only observed from one angle, it may not be able to correctly reflect the gloss of all coating samples. It seems that we should move closer to international standards in the future. By definition, glossy has two meanings:

One is the brightness of the reflected light,

The second is the clarity of the object image that can be seen from the reflected light.

In the projection Glossmeter (such as the Tu 1-5 type Glossmeter used before), these two aspects can be reflected faithfully. The gloss reading of the photoelectric gloss meter is a comprehensive reflection of these two aspects. In addition, if the model is slightly deformed, the test data will be obviously unstable. Because the natural exposure model is large and easy to warp, it is prone to data instability. In the future, it is worth studying whether natural exposure samples can be tested by projection Glossmeter.