Why do old photos lose color over time? Is it because they get damaged by air, kind of like metal getting corroded?
In: Chemistry
This is because the UV light affects the chemical makeup of the picture. The ink that is used to print these photographs contains a light absorbing body called chromophores. When any amount of light is absorbed by these compounds, the UV rays in that light break down the chemical bond of the picture dye, causing the colors to fade away. Various toxins and pollutants in your home and surroundings are not just damaging for your pictures. Household chemicals, second hand smoke and dust can damage the chemical composition of your pictures and cause fading, stains and even abrasions on your photographs. This is why it is important to keep your pictures away from the fireplace or any open windows.
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