Old photographs turn yellow because they get tired from being out in the light for too long.
Photographs are like paper drawings, but with special stuff on them that lets you see colors and faces. When these pictures sit in a sunny room, something happens inside them, it's like when your skin gets sunburned after playing outside all day.
What Makes Them Turn Yellow
When the light hits the photo for a long time, it starts to change the special stuff on the paper. It’s kind of like when you leave a piece of fruit out in the sun, eventually, it goes bad and changes color.
This special stuff used to be white or clear, but over time, it turns yellow, just like how your favorite shirt might fade from bright blue to pale blue after many washes.
Why Some Photos Turn Yellow Faster
Some photos turn yellow faster because they were made with more of that special stuff, kind of like how a bigger cake takes longer to bake. If the photo was in a very sunny place or near a lamp for years, it gets even yellower!
So, every time you look at an old picture and see a yellow tint, you're seeing how much light it has been having fun with over the years!
Examples
- A family photo from the 1970s now looks yellow and faded, like it's been sitting in a sunbeam for decades.
- A child’s portrait from their grandmother turns yellow over time, making them look old and tired.
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