Why do old photos lose color over time? Is it because they get damaged by air, kind of like metal getting corroded?
In: Chemistry
Not all inks are resistant to fading when exposed to UV light and oxygen. It’s likely that older inks might not have been considered for this quality instead choosing whatever was most convenient to get the process started.
Modern pigments are judged on an absolute scale of how lightfast they are with the information available online. Often the most vibrant inks are also not very lightfast
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