[China Glass Network] A friend reflected that there was a rainbow spot in the sun room that was installed soon. How can this be good?
Everyone likes the rainbow, but I believe no one likes the rainbow spots on the glass of their home. Today, the door and window madman gives you an analysis of the causes and solutions for the rainbow spots in the glass.
What is a glass rainbow spot?
Strips, blocks and other stripes resembling rainbow colors appear on the glass, called glass rainbow spots. The probability of rainbow spots appearing on tempered glass is usually higher than that of ordinary glass.
Glass rainbow markings are produced in two common situations:
1. Glass rainbow spots caused by uneven stress distribution of tempered glass
The tempered glass will have compressive stress formed on the surface layer of the glass, and the tensile stress formed inside the glass will have a difference in density from the surface to the center and at different positions of the same surface layer. The macroscopically irregular atomic arrangement causes the tempered glass to become an anisotropic material. When a bundle of polarized light passes through the tempered glass, this makes the passage through which the visible light passes a tortuous path. Due to the difference in optical density inside the glass, the light is split into two polarized lights of different propagation speeds. That is, one beam is light that travels relatively fast, and one beam is light that travels relatively slowly. When two beams formed at a certain point intersect with a beam formed at another point, there is a phase difference at the intersection of the beams due to the difference in the speed of light propagation. At this point, the two beams will interfere, when the two beams When the amplitude of the light is in the same direction, the light is reinforced, creating a bright field of view, i.e., rainbow markings. Therefore, the more uneven the stress distribution of the tempered glass, the more obvious the rainbow marking phenomenon on the surface.
For the rainbow spot where the stress distribution of the glass is uneven, the solution is to make the temperature of each area of ​​the glass uniform and uniform before the glass is air-cooled. The cooling rate and the wind speed are uniform during the air cooling process, and the glass can be lowered. The appearance of rainbow markings.
Second, the glass is damp and produces a rainbow spot caused by mildew
In the process of storage and transportation, even in the installation and use of glass, due to the erosion of water vapor or other chemical products in the air, it is easy to appear rainbow spots, white spots, white fog, etc. on the surface, resulting in decreased transparency and decreased finish.
The rainbow spot of the glass produced in this case can be found in time to be cleaned with 8% hydrofluoric acid or with a glass mold remover, and a good removal effect can be achieved. If left untreated for a long time, the glass rainbow spots are difficult to remove.
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