Glass haze refers to the size of water droplets or fog formed on the surface of glass under certain conditions, which is generally expressed as a percentage. It reflects the wetness and microstructure of the glass surface, and is one of the important indicators to measure the quality of glass.
The measurement of glass haze is very important for the production and use of glass products. In the production process, if there is a problem of large haze on the glass surface, it will affect the quality and aesthetics of the product. In the process of use, if there is a large haze on the glass surface, it will not only affect the transparency and line of sight of the glass, but also cause water droplets to remain on the glass surface, which will cause bacterial breeding and corrosion.
There are several ways to measure glass haze, the most commonly used of which is the drip method. In this method, a certain volume of water droplets is placed on the glass surface and the shape and size of the water droplets are observed, so as to evaluate the wetness and haze of the glass surface. In addition, there are other methods such as haze meter method, gloss meter method, etc., but these methods have certain limitations when measuring glass haze.
1. Haze meter method.
The haze meter method is a method of measuring transparency by using the degree to which light is scattered through the sample. This method is suitable for measuring samples with high transparency, such as glass, plastics, etc.
1.Measuring principle.
The measuring principle of the haze meter method is based on the principle of light scattering. When light passes through a sample, it interacts with particles, molecules, etc., resulting in scattering and refraction of light. The higher the transparency of the sample, the less light is scattered and refracted, and the higher the opacity of the sample, the more light is scattered and refracted severely. Therefore, by measuring the intensity of the scattered light of the sample, the transparency of the sample can be determined.
2.Measurement steps.
1) Place the sample on the sample stage of the foggimeter to ensure that the surface of the sample is flat and free of bubbles and impurities.
2) Turn on the power of the haze meter, warm it up for a few minutes, and put the sample into the measurement area after the instrument is stable.
3) Adjust the measurement angle of the haze meter and the brightness of the light source so that the light fully shines on the sample.
4) Observe the intensity of scattered light in the measurement area and record the data. It is often necessary to measure samples at multiple different locations, averaging them.
3.Advantages and limitations.
1) Advantages: The fog meter method has the advantages of high measurement accuracy, easy operation and fast speed, and is suitable for sample measurement with high transparency.
2) Limitations: For some opaque samples, the fog meter method cannot accurately measure their transparency. In addition, the haze meter method can only measure the overall transparency of the sample and cannot provide local transparency information of the sample.
Second, the gloss meter.
Glossmeter is a method of measuring surface gloss, the principle of which is to use the principle of light reflection and scattering to determine the surface gloss of a sample. This method is suitable for measuring the surface gloss of various materials, such as metals, plastics, glass, etc.
100 Families Help Plan 1Measuring principle.
The measuring principle of the gloss meter method is based on the principle of light reflection and scattering. When light hits the surface of a sample, some of the light is reflected back from the sample surface and the other part is scattered from the sample surface. The higher the glossiness of the surface of the sample, the greater the proportion of light reflection and the smaller the proportion of light scattering. Therefore, the surface gloss of the sample can be determined by measuring the intensity of the reflected light and the intensity of the scattered light of the sample.
2.Measurement steps.
1) Place the sample on the sample stage of the gloss meter to ensure that the surface of the sample is flat and free of scratches and impurities.
2) Turn on the power of the gloss meter, preheat it for a few minutes, and put the sample into the measurement area after the instrument is stable.
3) Adjust the light source angle and measurement angle of the gloss meter so that the light fully shines on the sample.