When used for a long time, acrylic made of coloured acrylic panels will produce fading, which is related to the light resistance of acrylic, oxidation resistance, heat resistance and so on.
Life everywhere visible light, whether it is sunlight, fluorescent lamps or other light, will have an impact on the light resistance of the colourant, if the colourant itself is poor light resistance, that after a long time of irradiation, the colour will slowly become lighter or even faded to nothing. Light resistance is an important indicator of the colourant is good or bad, if you want to use the acrylic board lasting colour, it is recommended to choose a better light-resistant colourant. Some organic pigments in acrylic after oxidation of macromolecular degradation will occur fading phenomenon colorant if not heat-resistant, in the hot summer, or high temperature environment, it is easy to appear not heat-resistant and fading, so if the colour acrylic board with high requirements for colour retention is best to do a good job of high temperature treatment. Colour acrylic plate fading and colorant chemical resistance (acid and alkali resistance, redox resistance) also has a very big relationship. Such as molybdenum chromium red dilute acid resistance, but sensitive to alkali, cadmium yellow is not acid-resistant, these two pigments and phenolic resins play a strong reducing effect on some colouring agents, seriously affecting the heat resistance of the colouring agent, weathering resistance and fading occurs.
So in the choice of coloured acrylic sheet or other coloured acrylic products, we have to choose a good light fastness colorant to extend the service life and slow down the fading time, if you are worried about fading, you can choose other acrylic sheet, such as pmma sheet, non glare acrylic sheet, rainbow acrylic sheet and so on. But if you still like the colour acrylic sheet, try to choose some good, long time with the fading can be replaced in time.
