How to prevent posters from fading? How can I keep the wedding poster taken by the studio from changing color?

How to avoid fading posters? Only change the location, or use curtains to block the sun, or cover the paper poster with a photo frame and put it in a dry and ventilated place. How can posters never fade? What material has the highest durability? Almost all posters will fade, but at different times. Posters will fade relatively quickly under light. Mineral pigments are often not easy to fade (except lead white and parts). Posters of cellulose (cotton, plants) are durable because they are firm and stable, but they will turn yellow (oxidized) in a few years. If they leave for a few years, this will not be a problem. Seek adoption. How to make the wedding posters taken by the studio not change color should be solved from three aspects: shooting, post-production and printing. Shooting: Shooting is mainly to calibrate the white balance and exposure (overexposure or underexposure can also lead to changes in color saturation). When shooting, it is recommended to use a white balance card to calibrate the white balance (but considering that general wedding photos need to be refined, it is recommended to take RAW photos) and use a gray card to measure light. Post-stage: color cards are needed for post-stage color correction. When taking a group of photos, keep exposure parameters, lighting environment, lens focal length, etc. No change, take a color card, then correct the color of the photo of this color card on the computer, and then apply it to this group of photos, so that the colors of other photos in this group are also calibrated. Considering that general wedding photos need to be refined, artists usually need to make color correction in their presentations. Generally, professional monitors with wide color gamut are used, and tools such as spider or eye-one are used for color correction. Printing: ICC of printing machine (if printing paper is used) must be calibrated (if printing machine is used, the printer also needs to calibrate ICC). In short, in order to restore the color as much as possible, every link is very important in the process of input, processing and output. There is an error in one link, which may lead to color cast.