How to Measure Fluorocarbon Paint Film Gloss?
Fluorocarbon coating is a commonly used paint for building materials. It has many advantages such as weather resistance, salt resistance, strong adhesion, good film flexibility, etc. According to the gloss difference of fluorocarbon coatings, it can be divided into high gloss and matte gloss.
1. Influencing factors of fluorocarbon coating gloss
There are many factors influencing the gloss of the paint film, which are mainly manifested in the following aspects:
(1) Gloss of paint
Different fluorocarbon coatings have different glossiness due to the particle size of the pigment.
(2) Gloss of substrate
Coating fluorocarbon coatings on the surface of different substrates will result in different gloss of the paint film due to the difference in substrate roughness and paint adsorption.
(3) Painting process
Fluorocarbon coating spraying rate and drying time will cause uneven thickness of fluorocarbon coating film, which will affect the surface gloss.
2. How to detect the gloss of fluorocarbon coatings?
The gloss of the fluorocarbon coating film has an aesthetic effect on the overall appearance of the coating. The coating industry is accustomed to the gloss of the film can be divided into full matte, matte, semi-matte and high-gloss. The gloss of the paint film refers to the percentage of the light reflected from the front of the sample surface and the amount of light reflected from the surface of the standard plate under the same conditions. It mainly depends on the illumination and observation angle of the light source. Instrument measurement usually uses 20 °, 45 °, 60 °, or 85 ° illumination and detection signals. Different industries often use instruments with different measurement angles.
The gloss of the fluorocarbon paint film is tested by a gloss tester, which is an instrument for measuring the surface gloss of ceramics, paints, inks, plastics, marble, aluminum, hardware and other materials in accordance with the national inspection regulations JJG 696.
"Measurement angle" refers to the angle between incident light and reflected light. Three measurement angles (20 °, 60 ° and 85 °) can measure the gloss of most coatings. The angle is selected based on the gloss range of the object. We can use 60 degree angle gloss tester to measure the object. If the gloss exceeds 70GU, we can use 20 degree angle gloss tester. If the gloss is less than 20GU, an 85-degree angle gloss tester can be used. If you can't judge the surface gloss of the object you need to measure, you can buy a universal 60 degree angle gloss tester. With the continuous improvement of the gloss tester's resolution, the measurement angle of 60 degrees can meet the measurement requirements of most objects.
Therefore, it is recommended to use Linshang LS192 portable gloss tester for testing fluorocarbon paint film. LS192 is a gloss tester with a measurement range of up to 1000GU. It can be used to test the surface gloss of paints, coatings, inks, plastics, paper, tiles, ceramics, stone, metal and electroplated products.