Light in nature can be simply described by wavelength. Under normal circumstances, light below 290 and above 3000 is filtered by the ozone layer and space. In theory, only the light between 290 and 3000 bands is analyzed. We call it analyzable light.
We call the 290---400 analyzable light, which accounts for only 5%, ultraviolet rays, 400 to 800, 40% of the analyzable light, visible light, and 800 to 3,000, 55% of the light, infrared light. It is 290 to 400 ultraviolet rays that the destructive force of the container bag is affected by light.
1) Shield ultraviolet rays, such as childish carbon black
2) Quench ultraviolet rays, use hindered amine light stabilizer
3) Reflect UV
4) Absorb ultraviolet rays.
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