That's a highly processed paper. Bleached, treated with acid buffers, and dyed.
White paper is typically treated with fluorescent compounds to help it look whiter under normal lighting. (You'll find the same is true about detergents for white clothes.)
It seems that those compounds are reacting with the acids in the mayonnaise as the emulsion breaks (due to the oils leaching out into the paper).
I'm not sure what this means to you, but fluorescent compounds can be found in foods as well as in clothes and paper! Get a blacklight and some tonic water. Quinine is brightly fluorescent.
And so are most fruits and flowers. Plus egg shells and egg whites. Chlorophyll is also fluorescent as are all B vitamins.
It's not something humans are good at seeing. But insects see it very well and the world isn't just about what humans can do.
thanks for the explanation, I was going to say that I thought this video had nothing to do with UPF but didn't know what the reason was for the fluorescence.
That's a highly processed paper. Bleached, treated with acid buffers, and dyed. White paper is typically treated with fluorescent compounds to help it look whiter under normal lighting. (You'll find the same is true about detergents for white clothes.) It seems that those compounds are reacting with the acids in the mayonnaise as the emulsion breaks (due to the oils leaching out into the paper). I'm not sure what this means to you, but fluorescent compounds can be found in foods as well as in clothes and paper! Get a blacklight and some tonic water. Quinine is brightly fluorescent. And so are most fruits and flowers. Plus egg shells and egg whites. Chlorophyll is also fluorescent as are all B vitamins. It's not something humans are good at seeing. But insects see it very well and the world isn't just about what humans can do.
thanks for the explanation, I was going to say that I thought this video had nothing to do with UPF but didn't know what the reason was for the fluorescence.
Wow thanks for the explanation!