What stays longer on paper when it's exposed to water

Pencil on paper will not fade or blur normally when exposed to water drops or water.
-The right hardness (H) can be important or just HB can also be right
But if all papers stick together it's stil a problem. Though if written with a pencil more can be saved.

A normal pen's ink on paper will blur and or fade completely when exposed to water or even simple water drops.
But there are waterproof pens.

And waterproof notebooks, exist.

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